Merge pull request 'v1.4.0' (#44) from dev into main

Reviewed-on: #44

.claude/settings.local.json

@@ -1,7 +1,9 @@
 {
   "permissions": {
     "allow": [
-      "Bash(npm test:*)"
+      "Bash(npm test:*)",
+      "Bash(npm install:*)",
+      "Bash(find /c/Users/josh1/Documents/Code/Catalyst -type f \\\\\\(-name *.test.js -o -name *.spec.js -o -name .env* -o -name *.config.js \\\\\\))"
     ]
   }
 }

.dockerignore

@@ -1,8 +1,10 @@
 .git
 .gitea
+.gitignore
 Dockerfile
 .dockerignore
 docker-compose.yml
 node_modules
 tests
 vitest.config.js
+data

.gitea/workflows/build.yml

@@ -1,84 +0,0 @@
-name: Build
-
-on:
-  push:
-    branches: [main]
-    tags:
-      - 'v*'
-
-env:
-  IMAGE: ${{ vars.REGISTRY_HOST }}/${{ gitea.repository_owner }}/catalyst
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: lts/*
-          cache: npm
-
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Run tests
-        run: npm test
-
-  build:
-    runs-on: ubuntu-latest
-    needs: test
-    if: startsWith(gitea.ref, 'refs/tags/v')
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Docker metadata
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.IMAGE }}
-          tags: |
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=sha,prefix=,format=short
-            type=raw,value=latest,enable={{is_default_branch}}
-
-      - name: Log in to Gitea registry
-        uses: docker/login-action@v3
-        with:
-          registry: ${{ vars.REGISTRY_HOST }}
-          username: ${{ gitea.actor }}
-          password: ${{ secrets.TOKEN }}
-
-      - name: Build and push
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-
-  release:
-    runs-on: ubuntu-latest
-    needs: build
-    if: startsWith(gitea.ref, 'refs/tags/v')
-
-    steps:
-      - name: Create release
-        run: |
-          curl -sf -X POST \
-            -H "Authorization: token ${{ secrets.TOKEN }}" \
-            -H "Content-Type: application/json" \
-            "${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}/releases" \
-            -d "{
-              \"tag_name\": \"${{ gitea.ref_name }}\",
-              \"name\": \"Catalyst ${{ gitea.ref_name }}\",
-              \"body\": \"### Image\n\n\`${{ env.IMAGE }}:${{ gitea.ref_name }}\`\",
-              \"draft\": false,
-              \"prerelease\": false
-            }"

.gitea/workflows/ci.yml

@@ -0,0 +1,53 @@
+name: CI
+
+on:
+  push:
+    branches: [dev, main]
+  pull_request:
+    branches: [dev, main]
+
+env:
+  IMAGE: ${{ vars.REGISTRY_HOST }}/${{ gitea.repository_owner }}/catalyst
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 'lts/*'
+
+      - run: npm ci
+
+      - run: npm test
+
+  build-dev:
+    runs-on: ubuntu-latest
+    needs: test
+    if: github.event_name == 'push' && github.ref == 'refs/heads/dev'
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Log in to registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ vars.REGISTRY_HOST }}
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.TOKEN }}
+
+      - name: Compute short SHA
+        run: echo "SHORT_SHA=$(git rev-parse --short HEAD)" >> $GITEA_ENV
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          build-args: BUILD_VERSION=dev-${{ env.SHORT_SHA }}
+          tags: |
+            ${{ env.IMAGE }}:dev
+            ${{ env.IMAGE }}:dev-${{ gitea.sha }}

.gitea/workflows/release.yml

@@ -0,0 +1,109 @@
+name: Release
+
+on:
+  push:
+    branches: [main]
+
+env:
+  IMAGE: ${{ vars.REGISTRY_HOST }}/${{ gitea.repository_owner }}/catalyst
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 'lts/*'
+
+      - run: npm ci
+      - run: npm test
+
+      - name: Read version
+        run: |
+          VERSION=$(node -p "require('./package.json').version")
+          echo "VERSION=${VERSION}" >> $GITEA_ENV
+
+      - name: Assert tag does not exist
+        run: |
+          if git ls-remote --tags origin "refs/tags/v${{ env.VERSION }}" | grep -q .; then
+            echo "ERROR: tag v${{ env.VERSION }} already exists — bump version in package.json before merging to main."
+            exit 1
+          fi
+
+      - name: Create and push tag
+        run: |
+          git config user.name "gitea-actions"
+          git config user.email "actions@gitea"
+          git tag "v${{ env.VERSION }}"
+          git push origin "v${{ env.VERSION }}"
+
+      - name: Generate release notes
+        run: |
+          LAST_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
+          if [ -n "$LAST_TAG" ]; then
+            git log "${LAST_TAG}..HEAD" --pretty=format:"- %s" --no-merges > /tmp/release_notes.txt
+          else
+            git log --pretty=format:"- %s" --no-merges > /tmp/release_notes.txt
+          fi
+
+      - name: Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE }}
+          tags: |
+            type=semver,pattern={{version}},value=v${{ env.VERSION }}
+            type=semver,pattern={{major}}.{{minor}},value=v${{ env.VERSION }}
+            type=sha,prefix=,format=short
+            type=raw,value=latest
+
+      - name: Log in to registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ vars.REGISTRY_HOST }}
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+
+      - name: Create Gitea release
+        run: |
+          cat > /tmp/make_release.py << 'PYEOF'
+          import json, os
+          v   = os.environ['VERSION']
+          img = os.environ['IMAGE']
+          raw = open('/tmp/release_notes.txt').read().strip()
+          feats, fixes = [], []
+          for line in raw.splitlines():
+              msg = line.lstrip('- ').strip()
+              if msg.startswith('feat:'):
+                  feats.append('- ' + msg[5:].strip())
+              elif msg.startswith('fix:'):
+                  fixes.append('- ' + msg[4:].strip())
+          sections = []
+          if feats:
+              sections.append('### New Features\n\n' + '\n'.join(feats))
+          if fixes:
+              sections.append('### Bug Fixes\n\n' + '\n'.join(fixes))
+          notes = '\n\n'.join(sections) or '_No changes_'
+          body  = notes + '\n\n### Image\n\n`' + img + ':' + v + '`'
+          payload = {'tag_name': 'v'+v, 'name': 'Catalyst v'+v, 'body': body, 'draft': False, 'prerelease': False}
+          open('/tmp/release_body.json', 'w').write(json.dumps(payload))
+          PYEOF
+          python3 /tmp/make_release.py
+          curl -sf -X POST \
+            -H "Authorization: token ${{ secrets.TOKEN }}" \
+            -H "Content-Type: application/json" \
+            "${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}/releases" \
+            --data @/tmp/release_body.json

.gitignore

@@ -1,2 +1,4 @@
 node_modules/
-js/version.js
+data/*.db
+data/*.db-shm
+data/*.db-wal

Dockerfile

@@ -1,6 +1,22 @@
-FROM nginx:alpine
-COPY nginx.conf /etc/nginx/conf.d/default.conf
-COPY . /usr/share/nginx/html
-RUN awk -F'"' '/"version"/{printf "const VERSION = \"%s\";\n", $4; exit}' \
-    /usr/share/nginx/html/package.json \
-    > /usr/share/nginx/html/js/version.js
+FROM node:lts-alpine
+RUN addgroup -S app && adduser -S app -G app
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci --omit=dev
+
+COPY . .
+ARG BUILD_VERSION=""
+RUN if [ -n "$BUILD_VERSION" ]; then \
+      printf 'const VERSION = "%s";\n' "$BUILD_VERSION" > js/version.js; \
+    else \
+      awk -F'"' '/"version"/{printf "const VERSION = \"%s\";\n", $4; exit}' \
+          package.json > js/version.js; \
+    fi
+
+RUN mkdir -p /app/data && chown -R app:app /app
+USER app
+
+EXPOSE 3000
+CMD ["node", "server/server.js"]

README.md

@@ -1,134 +1,243 @@
 # Catalyst
 
-A lightweight instance registry for tracking self-hosted infrastructure. No backend, no framework — just a browser, a SQLite database compiled to WebAssembly, and a static file server. :)
-
-## Structure
-
-```
-index.html        Entry point
-css/app.css       Styles
-js/
-  config.js       Service definitions and seed data
-  db.js           Data layer
-  ui.js           Rendering, modals, notifications
-  app.js          Router
-```
-
-## Data layer
-
-All reads and writes go through five functions in `js/db.js`. This is the boundary that would be replaced when wiring Catalyst to a real backend — nothing else in the codebase touches data directly.
-
-### `getInstances(filters?)`
-
-Returns an array of instances, sorted by name. All filters are optional.
-
-```js
-getInstances()
-getInstances({ search: 'plex' })
-getInstances({ state: 'degraded' })
-getInstances({ stack: 'production' })
-getInstances({ search: 'home', state: 'deployed', stack: 'production' })
-```
-
-`search` matches against `name`, `vmid`, and `stack`.
-
-### `getInstance(vmid)`
-
-Returns a single instance by VMID, or `null` if not found.
-
-```js
-getInstance(137) // → { id, name, vmid, state, stack, ...services, createdAt, updatedAt }
-```
-
-### `getDistinctStacks()`
-
-Returns a sorted array of unique stack names present in the registry. Used to populate the stack filter dynamically.
-
-```js
-getDistinctStacks() // → ['development', 'production']
-```
-
-### `createInstance(data)`
-
-Inserts a new instance. Returns `{ ok: true }` on success or `{ ok: false, error }` on failure (e.g. duplicate VMID).
-
-```js
-createInstance({
-  name: 'plex',
-  vmid: 117,
-  state: 'deployed',        // 'deployed' | 'testing' | 'degraded'
-  stack: 'production',
-  tailscale_ip: '100.64.0.1',
-  atlas: 1,
-  argus: 1,
-  semaphore: 0,
-  patchmon: 1,
-  tailscale: 1,
-  andromeda: 0,
-  hardware_acceleration: 1,
-})
-```
-
-### `updateInstance(id, data)`
-
-Updates an existing instance by internal `id`. Accepts the same shape as `createInstance`. Returns `{ ok: true }` or `{ ok: false, error }`.
-
-### `deleteInstance(id)`
-
-Deletes an instance by internal `id`. Only instances on the `development` stack can be deleted — this is enforced in the UI before `deleteInstance` is ever called.
+A self-hosted infrastructure registry for homelab Proxmox environments. Track virtual machines across stacks, monitor service health, and maintain a full audit log of every configuration change.
 
 ---
 
-## Instance shape
+## Features
 
-| Field | Type | Notes |
+- **Dashboard** — filterable, searchable instance list with state and stack badges
+- **Detail pages** — per-instance view with service flags, Tailscale IP, and a full change timeline
+- **Audit log** — every field change is recorded with before/after values and a timestamp
+- **Full CRUD** — add, edit, and delete instances via a clean modal interface
+- **Production safeguard** — only development instances can be deleted; production instances must be demoted first
+- **Export / import** — JSON backup and restore via the settings modal
+- **REST API** — every operation is a plain HTTP call
+- **Persistent storage** — SQLite on a Docker named volume; survives restarts and upgrades
+- **Zero native dependencies** — SQLite via Node's built-in `node:sqlite`; no compilation, no binaries
+
+---
+
+## Quick start
+
+```bash
+docker compose up -d
+```
+
+Open [http://localhost:3000](http://localhost:3000).
+
+### Environment variables
+
+| Variable | Default | Description |
 |---|---|---|
-| `id` | integer | Internal autoincrement ID |
-| `vmid` | integer | Unique. Used as the public identifier and in URLs (`/instance/137`) |
-| `name` | string | Display name |
-| `state` | string | `deployed`, `testing`, or `degraded` |
-| `stack` | string | `production` or `development` |
-| `tailscale_ip` | string | Optional |
-| `atlas` | 0 \| 1 | |
-| `argus` | 0 \| 1 | |
-| `semaphore` | 0 \| 1 | |
-| `patchmon` | 0 \| 1 | |
-| `tailscale` | 0 \| 1 | |
-| `andromeda` | 0 \| 1 | |
-| `hardware_acceleration` | 0 \| 1 | |
-| `createdAt` | ISO string | Set on insert |
-| `updatedAt` | ISO string | Updated on every write |
+| `PORT` | `3000` | HTTP port the server binds to |
+| `DB_PATH` | `data/catalyst.db` | Path to the SQLite database file |
+
+---
+
+## REST API
+
+All endpoints are under `/api`. Request and response bodies are JSON.
+
+### Instances
+
+#### `GET /api/instances`
+
+Returns all instances sorted by name. All query parameters are optional.
+
+| Parameter | Type | Description |
+|---|---|---|
+| `search` | string | Partial match on `name`, `vmid`, or `stack` |
+| `state` | string | Exact match: `deployed`, `testing`, `degraded` |
+| `stack` | string | Exact match: `production`, `development` |
+
+```
+GET /api/instances?search=plex&state=deployed
+```
+
+```json
+[
+  {
+    "vmid": 117,
+    "name": "plex",
+    "state": "deployed",
+    "stack": "production",
+    "tailscale_ip": "100.64.0.1",
+    "atlas": 1, "argus": 1, "semaphore": 0,
+    "patchmon": 1, "tailscale": 1, "andromeda": 0,
+    "hardware_acceleration": 1,
+    "created_at": "2024-01-15T10:30:00",
+    "updated_at": "2024-03-10T14:22:00"
+  }
+]
+```
+
+---
+
+#### `GET /api/instances/stacks`
+
+Returns a sorted array of distinct stack names present in the registry.
+
+```
+GET /api/instances/stacks
+→ ["development", "production"]
+```
+
+---
+
+#### `GET /api/instances/:vmid`
+
+Returns a single instance by VMID.
+
+| Status | Condition |
+|---|---|
+| `200` | Instance found |
+| `400` | VMID is not a valid integer |
+| `404` | No instance with that VMID |
+
+---
+
+#### `GET /api/instances/:vmid/history`
+
+Returns the audit log for an instance — newest events first.
+
+| Status | Condition |
+|---|---|
+| `200` | History returned (may be empty array) |
+| `400` | VMID is not a valid integer |
+| `404` | No instance with that VMID |
+
+```json
+[
+  {
+    "id": 3,
+    "vmid": 117,
+    "field": "state",
+    "old_value": "testing",
+    "new_value": "deployed",
+    "changed_at": "2024-03-10T14:22:00"
+  },
+  {
+    "id": 1,
+    "vmid": 117,
+    "field": "created",
+    "old_value": null,
+    "new_value": null,
+    "changed_at": "2024-01-15T10:30:00"
+  }
+]
+```
+
+---
+
+#### `POST /api/instances`
+
+Creates a new instance. Returns the created record.
+
+| Status | Condition |
+|---|---|
+| `201` | Created successfully |
+| `400` | Validation error — see `errors` array in response |
+| `409` | VMID already exists |
+
+**Request body:**
+
+| Field | Type | Required | Notes |
+|---|---|---|---|
+| `name` | string | yes | |
+| `vmid` | integer | yes | Must be > 0 and unique |
+| `state` | string | yes | `deployed`, `testing`, or `degraded` |
+| `stack` | string | yes | `production` or `development` |
+| `tailscale_ip` | string | no | Valid IPv4 or empty string |
+| `atlas` | 0\|1 | no | |
+| `argus` | 0\|1 | no | |
+| `semaphore` | 0\|1 | no | |
+| `patchmon` | 0\|1 | no | |
+| `tailscale` | 0\|1 | no | |
+| `andromeda` | 0\|1 | no | |
+| `hardware_acceleration` | 0\|1 | no | |
+
+---
+
+#### `PUT /api/instances/:vmid`
+
+Replaces all fields on an existing instance. Accepts the same body shape as `POST`. The `vmid` in the body may differ from the URL — this is how you change a VMID.
+
+| Status | Condition |
+|---|---|
+| `200` | Updated successfully |
+| `400` | Validation error |
+| `404` | No instance with that VMID |
+| `409` | New VMID conflicts with an existing instance |
+
+---
+
+#### `DELETE /api/instances/:vmid`
+
+Deletes an instance. Only instances on the `development` stack may be deleted.
+
+| Status | Condition |
+|---|---|
+| `204` | Deleted successfully |
+| `400` | VMID is not a valid integer |
+| `404` | No instance with that VMID |
+| `422` | Instance is on the `production` stack |
+
+---
+
+### Backup
+
+#### `GET /api/export`
+
+Downloads a JSON backup of all instances as a file attachment.
+
+```json
+{
+  "version": 1,
+  "exported_at": "2024-03-10T14:22:00.000Z",
+  "instances": [ ... ]
+}
+```
+
+#### `POST /api/import`
+
+Replaces all instances from a JSON backup. Validates every row before committing — if any row is invalid the entire import is rejected.
+
+| Status | Condition |
+|---|---|
+| `200` | Import successful — returns `{ "imported": N }` |
+| `400` | Body missing `instances` array, or validation errors |
+
+---
+
+## Development
+
+```bash
+npm install
+npm test            # run all tests once
+npm run test:watch  # watch mode
+npm start           # start the server on :3000
+```
+
+Tests are split across three files:
+
+| File | What it covers |
+|---|---|
+| `tests/db.test.js` | SQLite data layer — CRUD, constraints, filters, history logging |
+| `tests/api.test.js` | HTTP API — all endpoints, status codes, error cases |
+| `tests/helpers.test.js` | UI helpers — `esc()` XSS contract, date formatting, history formatters |
 
 ---
 
 ## Versioning
 
-Catalyst uses [semantic versioning](https://semver.org). The version in `package.json` is the source of truth and must match the release tag.
+Catalyst uses [semantic versioning](https://semver.org). `package.json` is the single source of truth.
 
-| Change | Bump | Example |
-|---|---|---|
-| Bug fix | patch | `1.0.0` → `1.0.1` |
-| New feature, backward compatible | minor | `1.0.0` → `1.1.0` |
-| Breaking change | major | `1.0.0` → `2.0.0` |
+| Change | Bump |
+|---|---|
+| Bug fix | patch |
+| New feature, backward compatible | minor |
+| Breaking change | major |
 
-### Cutting a release
-
-**1. Bump the version in `package.json`**
-```json
-"version": "1.1.0"
-```
-
-**2. Commit, tag, and push**
-```bash
-git add package.json
-git commit -m "chore: release v1.1.0"
-git tag v1.1.0
-git push && git push --tags
-```
-
-Pushing the tag triggers the full pipeline: tests → build → release.
-
-- The image is tagged `:1.1.0`, `:1.1`, and `:latest` in the Gitea registry
-- A Gitea release is created at `v1.1.0` with the image reference in the release notes
-
-Pushes to `main` without a tag still run tests and build a `:latest` image — no release is created.
+Pushing a tag triggers the CI pipeline: **test → build → release**.
+Docker images are tagged `:x.y.z`, `:x.y`, and `:latest`.

css/app.css

@@ -25,6 +25,10 @@
   --mono: 'JetBrains Mono', 'IBM Plex Mono', monospace;
 }
 
+html {
+  zoom: 1.1;
+}
+
 html, body {
   height: 100%;
   background: var(--bg);
@@ -70,6 +74,19 @@ nav {
 
 .nav-sep { flex: 1; }
 
+.nav-btn {
+  background: none;
+  border: 1px solid var(--border2);
+  color: var(--text2);
+  border-radius: 6px;
+  padding: 4px 8px;
+  font-size: 14px;
+  cursor: pointer;
+  margin-left: 10px;
+  line-height: 1;
+}
+.nav-btn:hover { border-color: var(--accent); color: var(--accent); }
+
 .nav-divider { color: var(--border2); }
 
 .nav-status {
@@ -289,6 +306,7 @@ select:focus { border-color: var(--accent); }
   border-radius: 3px;
   letter-spacing: 0.08em;
   text-transform: uppercase;
+  text-align: center;
 }
 
 .badge.deployed    { background: var(--accent2); color: var(--accent); }
@@ -360,16 +378,25 @@ select:focus { border-color: var(--accent); }
 }
 
 .detail-sub {
-  font-size: 12px;
-  color: var(--text3);
-  margin-top: 6px;
+  font-size: 13px;
+  margin-top: 8px;
   display: flex;
-  gap: 16px;
+  align-items: center;
+  gap: 0;
 }
 
-.detail-sub span { display: flex; gap: 4px; }
-.detail-sub .lbl { color: var(--text3); }
-.detail-sub .val { color: var(--text2); }
+.detail-sub > span {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+.detail-sub > span + span {
+  margin-left: 12px;
+  padding-left: 12px;
+  border-left: 1px solid var(--border);
+}
+.detail-sub .lbl { color: var(--text3); font-size: 11px; }
+.detail-sub .val { color: var(--text); }
 
 .detail-actions { display: flex; gap: 8px; }
 
@@ -614,6 +641,58 @@ select:focus { border-color: var(--accent); }
 
 .confirm-actions { display: flex; justify-content: flex-end; gap: 10px; }
 
+/* ── HISTORY TIMELINE ── */
+.tl-item {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 24px;
+  padding: 9px 0;
+  border-bottom: 1px solid var(--border);
+}
+.tl-item:last-child { border-bottom: none; }
+.tl-event  { display: flex; align-items: center; gap: 7px; font-size: 13px; min-width: 0; }
+.tl-label  { color: var(--text2); }
+.tl-sep    { color: var(--text3); user-select: none; }
+.tl-old    { color: var(--text3); text-decoration: line-through; font-size: 12px; }
+.tl-arrow  { color: var(--text3); font-size: 11px; }
+.tl-new    { color: var(--text); font-weight: 500; }
+.tl-time   { color: var(--text3); font-size: 11px; white-space: nowrap; flex-shrink: 0; }
+.tl-deployed { color: var(--accent); }
+.tl-testing  { color: var(--amber); }
+.tl-degraded { color: var(--red); }
+.tl-created .tl-event { color: var(--accent); font-weight: 500; }
+.tl-empty  { color: var(--text3); font-size: 12px; padding: 8px 0; }
+
+/* ── SETTINGS MODAL ── */
+#settings-modal .modal-body { padding-top: 0; }
+.settings-section { padding: 16px 0; border-bottom: 1px solid var(--border); }
+.settings-section:last-child { border-bottom: none; padding-bottom: 0; }
+.settings-section-title {
+  font-size: 10px;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.1em;
+  color: var(--text3);
+  margin-bottom: 8px;
+}
+.settings-desc { font-size: 12px; color: var(--text2); margin: 0 0 14px; line-height: 1.6; }
+.settings-row { display: flex; align-items: center; gap: 12px; }
+.settings-label { font-size: 13px; color: var(--text2); white-space: nowrap; min-width: 80px; }
+.settings-select { flex: 1; }
+.import-row { display: flex; gap: 10px; align-items: center; }
+.import-file-input { flex: 1; }
+
+.btn-secondary {
+  background: var(--bg3);
+  border-color: var(--border2);
+  color: var(--text);
+}
+.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
+
+.btn-danger { background: var(--red2); border-color: var(--red); color: var(--text); }
+.btn-danger:hover { background: var(--red); }
+
 /* ── SCROLLBAR ── */
 ::-webkit-scrollbar       { width: 6px; }
 ::-webkit-scrollbar-track { background: var(--bg); }
@@ -633,3 +712,55 @@ select:focus { border-color: var(--accent); }
   0%, 100% { opacity: 1; }
   50%       { opacity: 0; }
 }
+
+/* ── MOBILE ── */
+@media (max-width: 640px) {
+  /* Reset desktop zoom — mobile browsers handle scaling themselves */
+  html { zoom: 1; }
+
+  /* Nav */
+  nav { padding: 0 16px; }
+
+  /* Dashboard header */
+  .dash-header { padding: 18px 16px 14px; }
+
+  /* Stats bar */
+  .stat-cell { padding: 10px 16px; }
+
+  /* Toolbar — search full-width on first row, filters + button below */
+  .toolbar    { flex-wrap: wrap; padding: 10px 16px; gap: 8px; }
+  .search-wrap { max-width: 100%; }
+  .toolbar-right { margin-left: 0; width: 100%; justify-content: flex-end; }
+
+  /* Instance grid — single column */
+  .instance-grid {
+    grid-template-columns: 1fr;
+    padding: 12px 16px;
+    gap: 8px;
+  }
+
+  /* Detail page */
+  .detail-page { padding: 16px; }
+
+  /* Detail header — stack title block above actions */
+  .detail-header { flex-direction: column; align-items: flex-start; gap: 14px; }
+
+  /* Detail sub — wrap items when they don't fit */
+  .detail-sub { flex-wrap: wrap; row-gap: 4px; }
+
+  /* Detail grid — single column */
+  .detail-grid { grid-template-columns: 1fr; }
+
+  /* Toggle grid — 2 columns instead of 3 */
+  .toggle-grid { grid-template-columns: 1fr 1fr; }
+
+  /* Confirm box — no fixed width on mobile */
+  .confirm-box { width: auto; max-width: calc(100vw - 32px); padding: 18px; }
+
+  /* History timeline — stack timestamp above event */
+  .tl-item  { flex-direction: column; align-items: flex-start; gap: 3px; }
+  .tl-time  { order: -1; }
+
+  /* Toast — stretch across bottom */
+  .toast { right: 16px; left: 16px; bottom: 16px; }
+}

docker-compose.yml

@@ -3,4 +3,11 @@ services:
     image: ${REGISTRY:-gitea.thewrightserver.net/josh}/catalyst:${TAG:-latest}
     restart: unless-stopped
     ports:
-      - "${PORT:-3000}:80"
+      - "${PORT:-3000}:3000"
+    volumes:
+      - catalyst-data:/app/data
+    environment:
+      - NODE_ENV=production
+
+volumes:
+  catalyst-data:

index.html

@@ -3,6 +3,7 @@
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <base href="/">
   <title>Catalyst</title>
   <link rel="preconnect" href="https://fonts.googleapis.com">
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
@@ -21,6 +22,7 @@
       <span class="nav-divider">·</span>
       <span id="nav-version"></span>
     </div>
+    <button class="nav-btn" onclick="openSettingsModal()" title="Settings">&#9881;</button>
   </nav>
 
   <main>
@@ -90,7 +92,7 @@
             <div class="services-grid" id="detail-services"></div>
           </div>
           <div class="detail-section full">
-            <div class="section-title">timestamps</div>
+            <div class="section-title">history</div>
             <div id="detail-timestamps"></div>
           </div>
         </div>
@@ -170,13 +172,44 @@
   </div>
 </div>
 
+<!-- SETTINGS MODAL -->
+<div id="settings-modal" class="modal-overlay">
+  <div class="modal">
+    <div class="modal-header">
+      <span class="modal-title">Settings</span>
+      <button class="modal-close" onclick="closeSettingsModal()">&#x2715;</button>
+    </div>
+    <div class="modal-body">
+      <div class="settings-section">
+        <div class="settings-section-title">Display</div>
+        <div class="settings-row">
+          <label class="settings-label" for="tz-select">Timezone</label>
+          <select id="tz-select" class="form-input settings-select"></select>
+        </div>
+      </div>
+      <div class="settings-section">
+        <div class="settings-section-title">Export</div>
+        <p class="settings-desc">Download all instance data as a JSON backup file.</p>
+        <button class="btn btn-secondary" onclick="exportDB()">Export Database</button>
+      </div>
+      <div class="settings-section">
+        <div class="settings-section-title">Import</div>
+        <p class="settings-desc">Restore from a backup file. This replaces all current instances.</p>
+        <div class="import-row">
+          <input type="file" id="import-file" accept=".json" class="form-input import-file-input">
+          <button class="btn btn-danger" onclick="importDB()">Import</button>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+
 <!-- TOAST -->
 <div class="toast" id="toast">
   <div class="toast-dot"></div>
   <span id="toast-msg"></span>
 </div>
 
-<script src="https://cdnjs.cloudflare.com/ajax/libs/sql.js/1.10.2/sql-wasm.js"></script>
 <script src="js/version.js" onerror="window.VERSION=null"></script>
 <script src="js/config.js"></script>
 <script src="js/db.js"></script>

js/app.js

@@ -21,6 +21,7 @@ function handleRoute() {
     renderDetailPage(parseInt(m[1], 10));
   } else {
     document.getElementById('page-dashboard').classList.add('active');
+    renderDashboard();
   }
 }
 
@@ -37,9 +38,9 @@ window.addEventListener('popstate', e => {
 
 // ── Bootstrap ─────────────────────────────────────────────────────────────────
 
-if (VERSION) document.getElementById('nav-version').textContent = `v${VERSION}`;
+if (VERSION) {
+  const label = /^\d/.test(VERSION) ? `v${VERSION}` : VERSION;
+  document.getElementById('nav-version').textContent = label;
+}
 
-initDB().then(() => {
-  renderDashboard();
 handleRoute();
-});

js/config.js

@@ -1,21 +1,6 @@
-// Services shown as dots on instance cards (all tracked services)
+// Services shown as dots on instance cards
 const CARD_SERVICES = ['atlas', 'argus', 'semaphore', 'patchmon', 'tailscale', 'andromeda'];
 
 // Services shown in the detail page service grid
-// (tailscale is shown separately under "network" alongside its IP)
+// (tailscale lives in the network section alongside its IP)
 const DETAIL_SERVICES = ['atlas', 'argus', 'semaphore', 'patchmon', 'andromeda'];
-
-const SQL_JS_CDN = 'https://cdnjs.cloudflare.com/ajax/libs/sql.js/1.10.2/';
-
-const STORAGE_KEY = 'catalyst_db';
-
-const SEED = [
-  { name: 'plex',             state: 'deployed',  stack: 'production',  vmid: 117, atlas: true,  argus: true,  semaphore: false, patchmon: true,  tailscale: true,  andromeda: false, tailscale_ip: '100.64.0.1',  hardware_acceleration: true  },
-  { name: 'foldergram',       state: 'testing',   stack: 'development', vmid: 137, atlas: false, argus: false, semaphore: false, patchmon: false, tailscale: false, andromeda: false, tailscale_ip: '',            hardware_acceleration: false },
-  { name: 'homeassistant',    state: 'deployed',  stack: 'production',  vmid: 102, atlas: true,  argus: true,  semaphore: true,  patchmon: true,  tailscale: true,  andromeda: false, tailscale_ip: '100.64.0.5',  hardware_acceleration: false },
-  { name: 'gitea',            state: 'deployed',  stack: 'production',  vmid: 110, atlas: true,  argus: false, semaphore: true,  patchmon: true,  tailscale: true,  andromeda: false, tailscale_ip: '100.64.0.8',  hardware_acceleration: false },
-  { name: 'postgres-primary', state: 'degraded',  stack: 'production',  vmid: 201, atlas: true,  argus: true,  semaphore: false, patchmon: true,  tailscale: false, andromeda: true,  tailscale_ip: '',            hardware_acceleration: false },
-  { name: 'nextcloud',        state: 'testing',   stack: 'development', vmid: 144, atlas: false, argus: false, semaphore: false, patchmon: false, tailscale: true,  andromeda: false, tailscale_ip: '100.64.0.12', hardware_acceleration: false },
-  { name: 'traefik',          state: 'deployed',  stack: 'production',  vmid: 100, atlas: true,  argus: true,  semaphore: false, patchmon: true,  tailscale: true,  andromeda: false, tailscale_ip: '100.64.0.2',  hardware_acceleration: false },
-  { name: 'monitoring-stack', state: 'testing',   stack: 'development', vmid: 155, atlas: false, argus: false, semaphore: true,  patchmon: false, tailscale: false, andromeda: false, tailscale_ip: '',            hardware_acceleration: false },
-];

js/db.js

@@ -1,159 +1,62 @@
-let db = null;
+// API client — replaces the sql.js database layer.
+// Swap these fetch() calls for any other transport when needed.
 
-// ── Persistence ──────────────────────────────────────────────────────────────
+const BASE = '/api';
 
-function saveToStorage() {
-  try {
-    const data = db.export(); // Uint8Array
-    let binary = '';
-    const chunk = 8192;
-    for (let i = 0; i < data.length; i += chunk) {
-      binary += String.fromCharCode(...data.subarray(i, i + chunk));
-    }
-    localStorage.setItem(STORAGE_KEY, btoa(binary));
-  } catch (e) {
-    console.warn('catalyst: failed to persist database', e);
-  }
+async function api(path, options = {}) {
+  const res = await fetch(BASE + path, options);
+  if (res.status === 204) return null;
+  return res.json().then(data => ({ ok: res.ok, status: res.status, data }));
 }
 
-function loadFromStorage() {
-  try {
-    const stored = localStorage.getItem(STORAGE_KEY);
-    if (!stored) return null;
-    const binary = atob(stored);
-    const buf = new Uint8Array(binary.length);
-    for (let i = 0; i < binary.length; i++) buf[i] = binary.charCodeAt(i);
-    return buf;
-  } catch (e) {
-    console.warn('catalyst: failed to load database from storage', e);
-    return null;
-  }
+// ── Queries ───────────────────────────────────────────────────────────────────
+
+async function getInstances(filters = {}) {
+  const params = new URLSearchParams(
+    Object.entries(filters).filter(([, v]) => v)
+  );
+  const res = await fetch(`${BASE}/instances?${params}`);
+  return res.json();
 }
 
-// ── Init ─────────────────────────────────────────────────────────────────────
-
-async function initDB() {
-  const SQL = await initSqlJs({ locateFile: f => SQL_JS_CDN + f });
-
-  const saved = loadFromStorage();
-  if (saved) {
-    db = new SQL.Database(saved);
-    return;
+async function getInstance(vmid) {
+  const res = await fetch(`${BASE}/instances/${vmid}`);
+  if (res.status === 404) return null;
+  return res.json();
 }
 
-  db = new SQL.Database();
-  db.run(`
-    CREATE TABLE instances (
-      id                   INTEGER PRIMARY KEY AUTOINCREMENT,
-      name                 TEXT    NOT NULL,
-      state                TEXT    DEFAULT 'deployed',
-      stack                TEXT    DEFAULT '',
-      vmid                 INTEGER UNIQUE NOT NULL,
-      atlas                INTEGER DEFAULT 0,
-      argus                INTEGER DEFAULT 0,
-      semaphore            INTEGER DEFAULT 0,
-      patchmon             INTEGER DEFAULT 0,
-      tailscale            INTEGER DEFAULT 0,
-      andromeda            INTEGER DEFAULT 0,
-      tailscale_ip         TEXT    DEFAULT '',
-      hardware_acceleration INTEGER DEFAULT 0,
-      createdAt            TEXT    DEFAULT (datetime('now')),
-      updatedAt            TEXT    DEFAULT (datetime('now'))
-    )
-  `);
-
-  const stmt = db.prepare(`
-    INSERT INTO instances
-      (name, state, stack, vmid, atlas, argus, semaphore, patchmon, tailscale, andromeda, tailscale_ip, hardware_acceleration)
-    VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
-  `);
-
-  SEED.forEach(s => stmt.run([
-    s.name, s.state, s.stack, s.vmid,
-    +s.atlas, +s.argus, +s.semaphore, +s.patchmon,
-    +s.tailscale, +s.andromeda, s.tailscale_ip, +s.hardware_acceleration,
-  ]));
-
-  stmt.free();
-  saveToStorage();
-}
-
-// ── Queries ──────────────────────────────────────────────────────────────────
-
-function getInstances(filters = {}) {
-  let sql = 'SELECT * FROM instances WHERE 1=1';
-  const params = [];
-
-  if (filters.search) {
-    sql += ' AND (name LIKE ? OR CAST(vmid AS TEXT) LIKE ? OR stack LIKE ?)';
-    const s = `%${filters.search}%`;
-    params.push(s, s, s);
-  }
-  if (filters.state) { sql += ' AND state = ?'; params.push(filters.state); }
-  if (filters.stack) { sql += ' AND stack = ?'; params.push(filters.stack); }
-
-  sql += ' ORDER BY name ASC';
-
-  const res = db.exec(sql, params);
-  if (!res.length) return [];
-  const cols = res[0].columns;
-  return res[0].values.map(row => Object.fromEntries(cols.map((c, i) => [c, row[i]])));
-}
-
-function getInstance(vmid) {
-  const res = db.exec('SELECT * FROM instances WHERE vmid = ?', [vmid]);
-  if (!res.length) return null;
-  const cols = res[0].columns;
-  return Object.fromEntries(cols.map((c, i) => [c, res[0].values[0][i]]));
-}
-
-function getDistinctStacks() {
-  const res = db.exec(`SELECT DISTINCT stack FROM instances WHERE stack != '' ORDER BY stack`);
-  if (!res.length) return [];
-  return res[0].values.map(row => row[0]);
+async function getDistinctStacks() {
+  const res = await fetch(`${BASE}/instances/stacks`);
+  return res.json();
 }
 
 // ── Mutations ─────────────────────────────────────────────────────────────────
 
-function createInstance(data) {
-  try {
-    db.run(
-      `INSERT INTO instances
-        (name, state, stack, vmid, atlas, argus, semaphore, patchmon, tailscale, andromeda, tailscale_ip, hardware_acceleration)
-       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
-      [data.name, data.state, data.stack, data.vmid,
-       data.atlas, data.argus, data.semaphore, data.patchmon,
-       data.tailscale, data.andromeda, data.tailscale_ip, data.hardware_acceleration]
-    );
-    saveToStorage();
+async function createInstance(data) {
+  const { ok, data: body } = await api('/instances', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+  });
+  if (!ok) return { ok: false, error: body.error ?? body.errors?.[0] ?? 'error creating instance' };
   return { ok: true };
-  } catch (e) {
-    return { ok: false, error: e.message };
-  }
 }
 
-function updateInstance(id, data) {
-  try {
-    db.run(
-      `UPDATE instances SET
-        name=?, state=?, stack=?, vmid=?,
-        atlas=?, argus=?, semaphore=?, patchmon=?,
-        tailscale=?, andromeda=?, tailscale_ip=?, hardware_acceleration=?,
-        updatedAt=datetime('now')
-       WHERE id=?`,
-      [data.name, data.state, data.stack, data.vmid,
-       data.atlas, data.argus, data.semaphore, data.patchmon,
-       data.tailscale, data.andromeda, data.tailscale_ip, data.hardware_acceleration,
-       id]
-    );
-    saveToStorage();
+async function updateInstance(vmid, data) {
+  const { ok, data: body } = await api(`/instances/${vmid}`, {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+  });
+  if (!ok) return { ok: false, error: body.error ?? body.errors?.[0] ?? 'error updating instance' };
   return { ok: true };
-  } catch (e) {
-    return { ok: false, error: e.message };
-  }
 }
 
-function deleteInstance(id) {
-  db.run('DELETE FROM instances WHERE id = ?', [id]);
-  saveToStorage();
+async function deleteInstance(vmid) {
+  await api(`/instances/${vmid}`, { method: 'DELETE' });
+}
+
+async function getInstanceHistory(vmid) {
+  const res = await fetch(`${BASE}/instances/${vmid}/history`);
+  return res.json();
 }

js/ui.js

@@ -1,8 +1,36 @@
 // Module-level UI state
-let editingId  = null;
+let editingVmid = null;
 let currentVmid = null;
 let toastTimer  = null;
 
+// ── Timezone ──────────────────────────────────────────────────────────────────
+
+const TIMEZONES = [
+  { label: 'UTC',                      tz: 'UTC' },
+  { label: 'Hawaii (HST)',             tz: 'Pacific/Honolulu' },
+  { label: 'Alaska (AKT)',             tz: 'America/Anchorage' },
+  { label: 'Pacific (PT)',             tz: 'America/Los_Angeles' },
+  { label: 'Mountain (MT)',            tz: 'America/Denver' },
+  { label: 'Central (CT)',             tz: 'America/Chicago' },
+  { label: 'Eastern (ET)',             tz: 'America/New_York' },
+  { label: 'Atlantic (AT)',            tz: 'America/Halifax' },
+  { label: 'London (GMT/BST)',         tz: 'Europe/London' },
+  { label: 'Paris / Berlin (CET)',     tz: 'Europe/Paris' },
+  { label: 'Helsinki (EET)',           tz: 'Europe/Helsinki' },
+  { label: 'Istanbul (TRT)',           tz: 'Europe/Istanbul' },
+  { label: 'Dubai (GST)',              tz: 'Asia/Dubai' },
+  { label: 'India (IST)',              tz: 'Asia/Kolkata' },
+  { label: 'Singapore (SGT)',          tz: 'Asia/Singapore' },
+  { label: 'China (CST)',              tz: 'Asia/Shanghai' },
+  { label: 'Japan / Korea (JST/KST)', tz: 'Asia/Tokyo' },
+  { label: 'Sydney (AEST)',            tz: 'Australia/Sydney' },
+  { label: 'Auckland (NZST)',          tz: 'Pacific/Auckland' },
+];
+
+function getTimezone() {
+  return localStorage.getItem('catalyst_tz') || 'UTC';
+}
+
 // ── Helpers ───────────────────────────────────────────────────────────────────
 
 function esc(str) {
@@ -11,24 +39,32 @@ function esc(str) {
   return d.innerHTML;
 }
 
+// SQLite datetime('now') → 'YYYY-MM-DD HH:MM:SS' (UTC, no timezone marker).
+// Appending 'Z' tells JS to parse it as UTC rather than local time.
+function parseUtc(d) {
+  if (typeof d !== 'string') return new Date(d);
+  const hasZone = d.endsWith('Z') || /[+-]\d{2}:\d{2}$/.test(d);
+  return new Date(hasZone ? d : d.replace(' ', 'T') + 'Z');
+}
+
 function fmtDate(d) {
   if (!d) return '—';
   try {
-    return new Date(d).toLocaleDateString('en-US', { year: 'numeric', month: 'short', day: 'numeric' });
+    return parseUtc(d).toLocaleDateString('en-US', { year: 'numeric', month: 'short', day: 'numeric', timeZone: getTimezone() });
   } catch (e) { return d; }
 }
 
 function fmtDateFull(d) {
   if (!d) return '—';
   try {
-    return new Date(d).toLocaleString('en-US', { year: 'numeric', month: 'short', day: 'numeric', hour: '2-digit', minute: '2-digit' });
+    return parseUtc(d).toLocaleString('en-US', { year: 'numeric', month: 'short', day: 'numeric', hour: '2-digit', minute: '2-digit', timeZone: getTimezone(), timeZoneName: 'short' });
   } catch (e) { return d; }
 }
 
 // ── Dashboard ─────────────────────────────────────────────────────────────────
 
-function renderDashboard() {
-  const all = getInstances();
+async function renderDashboard() {
+  const all = await getInstances();
   document.getElementById('nav-count').textContent = `${all.length} instance${all.length !== 1 ? 's' : ''}`;
 
   const states = {};
@@ -39,18 +75,18 @@ function renderDashboard() {
     <div class="stat-cell"><div class="stat-label">deployed</div><div class="stat-value">${states['deployed'] || 0}</div></div>
     <div class="stat-cell"><div class="stat-label">testing</div><div class="stat-value amber">${states['testing'] || 0}</div></div>
     <div class="stat-cell"><div class="stat-label">degraded</div><div class="stat-value red">${states['degraded'] || 0}</div></div>
-    <div class="stat-cell"><div class="stat-label">stacks</div><div class="stat-value">${getDistinctStacks().length}</div></div>
   `;
 
-  populateStackFilter();
-  filterInstances();
+  await populateStackFilter();
+  await filterInstances();
 }
 
-function populateStackFilter() {
+async function populateStackFilter() {
   const select = document.getElementById('filter-stack');
   const current = select.value;
   select.innerHTML = '<option value="">all stacks</option>';
-  getDistinctStacks().forEach(s => {
+  const stacks = await getDistinctStacks();
+  stacks.forEach(s => {
     const opt = document.createElement('option');
     opt.value = s;
     opt.textContent = s;
@@ -59,11 +95,11 @@ function populateStackFilter() {
   });
 }
 
-function filterInstances() {
+async function filterInstances() {
   const search = document.getElementById('search-input').value;
   const state  = document.getElementById('filter-state').value;
   const stack  = document.getElementById('filter-stack').value;
-  const instances = getInstances({ search, state, stack });
+  const instances = await getInstances({ search, state, stack });
   const grid = document.getElementById('instance-grid');
 
   if (!instances.length) {
@@ -76,7 +112,6 @@ function filterInstances() {
       `<div class="svc-dot ${inst[s] ? 'on' : ''}" title="${s}"></div>`
     ).join('');
     const activeCount = CARD_SERVICES.filter(s => inst[s]).length;
-
     return `
       <div class="instance-card state-${esc(inst.state)}" onclick="navigate('instance', ${inst.vmid})">
         <div class="card-top">
@@ -100,21 +135,50 @@ function filterInstances() {
 
 // ── Detail Page ───────────────────────────────────────────────────────────────
 
-function renderDetailPage(vmid) {
-  const inst = getInstance(vmid);
+const BOOL_FIELDS = ['atlas','argus','semaphore','patchmon','tailscale','andromeda','hardware_acceleration'];
+
+const FIELD_LABELS = {
+  name:                  'name',
+  state:                 'state',
+  stack:                 'stack',
+  vmid:                  'vmid',
+  tailscale_ip:          'tailscale ip',
+  atlas:                 'atlas',
+  argus:                 'argus',
+  semaphore:             'semaphore',
+  patchmon:              'patchmon',
+  tailscale:             'tailscale',
+  andromeda:             'andromeda',
+  hardware_acceleration: 'hw acceleration',
+};
+
+function stateClass(field, val) {
+  if (field !== 'state') return '';
+  return { deployed: 'tl-deployed', testing: 'tl-testing', degraded: 'tl-degraded' }[val] ?? '';
+}
+
+function fmtHistVal(field, val) {
+  if (val == null || val === '') return '—';
+  if (BOOL_FIELDS.includes(field)) return val === '1' ? 'on' : 'off';
+  return esc(val);
+}
+
+async function renderDetailPage(vmid) {
+  const [inst, history, all] = await Promise.all([getInstance(vmid), getInstanceHistory(vmid), getInstances()]);
   if (!inst) { navigate('dashboard'); return; }
   currentVmid = vmid;
+  document.getElementById('nav-count').textContent = `${all.length} instance${all.length !== 1 ? 's' : ''}`;
 
   document.getElementById('detail-vmid-crumb').textContent  = vmid;
   document.getElementById('detail-name').textContent        = inst.name;
   document.getElementById('detail-vmid-sub').textContent    = inst.vmid;
   document.getElementById('detail-id-sub').textContent      = inst.id;
-  document.getElementById('detail-created-sub').textContent = fmtDate(inst.createdAt);
+  document.getElementById('detail-created-sub').textContent = fmtDate(inst.created_at);
 
   document.getElementById('detail-identity').innerHTML = `
     <div class="kv-row"><span class="kv-key">name</span><span class="kv-val highlight">${esc(inst.name)}</span></div>
     <div class="kv-row"><span class="kv-key">state</span><span class="kv-val"><span class="badge ${esc(inst.state)}">${esc(inst.state)}</span></span></div>
-    <div class="kv-row"><span class="kv-key">stack</span><span class="kv-val highlight">${esc(inst.stack) || '—'}</span></div>
+    <div class="kv-row"><span class="kv-key">stack</span><span class="kv-val"><span class="badge ${esc(inst.stack)}">${esc(inst.stack) || '—'}</span></span></div>
     <div class="kv-row"><span class="kv-key">vmid</span><span class="kv-val highlight">${inst.vmid}</span></div>
     <div class="kv-row"><span class="kv-key">internal id</span><span class="kv-val">${inst.id}</span></div>
   `;
@@ -134,10 +198,30 @@ function renderDetailPage(vmid) {
     </div>
   `).join('');
 
-  document.getElementById('detail-timestamps').innerHTML = `
-    <div class="kv-row"><span class="kv-key">created</span><span class="kv-val">${fmtDateFull(inst.createdAt)}</span></div>
-    <div class="kv-row"><span class="kv-key">updated</span><span class="kv-val">${fmtDateFull(inst.updatedAt)}</span></div>
-  `;
+  document.getElementById('detail-timestamps').innerHTML = history.length
+    ? history.map(e => {
+        if (e.field === 'created') return `
+          <div class="tl-item tl-created">
+            <span class="tl-event">instance created</span>
+            <span class="tl-time">${fmtDateFull(e.changed_at)}</span>
+          </div>`;
+        const label = FIELD_LABELS[e.field] ?? esc(e.field);
+        const newCls = (e.field === 'state' || e.field === 'stack')
+          ? `badge ${esc(e.new_value)}`
+          : `tl-new ${stateClass(e.field, e.new_value)}`;
+        return `
+          <div class="tl-item">
+            <div class="tl-event">
+              <span class="tl-label">${label}</span>
+              <span class="tl-sep">·</span>
+              <span class="tl-old">${fmtHistVal(e.field, e.old_value)}</span>
+              <span class="tl-arrow">→</span>
+              <span class="${newCls}">${fmtHistVal(e.field, e.new_value)}</span>
+            </div>
+            <span class="tl-time">${fmtDateFull(e.changed_at)}</span>
+          </div>`;
+      }).join('')
+    : '<div class="tl-empty">no history yet</div>';
 
   document.getElementById('detail-edit-btn').onclick   = () => openEditModal(inst.vmid);
   document.getElementById('detail-delete-btn').onclick = () => confirmDeleteDialog(inst);
@@ -146,16 +230,16 @@ function renderDetailPage(vmid) {
 // ── Modal ─────────────────────────────────────────────────────────────────────
 
 function openNewModal() {
-  editingId = null;
+  editingVmid = null;
   document.getElementById('modal-title').textContent = 'new instance';
   clearForm();
   document.getElementById('instance-modal').classList.add('open');
 }
 
-function openEditModal(vmid) {
-  const inst = getInstance(vmid);
+async function openEditModal(vmid) {
+  const inst = await getInstance(vmid);
   if (!inst) return;
-  editingId = inst.id;
+  editingVmid = inst.vmid;
   document.getElementById('modal-title').textContent    = `edit / ${inst.name}`;
   document.getElementById('f-name').value               = inst.name;
   document.getElementById('f-vmid').value               = inst.vmid;
@@ -186,19 +270,18 @@ function clearForm() {
     .forEach(id => { document.getElementById(id).checked = false; });
 }
 
-function saveInstance() {
+async function saveInstance() {
   const name  = document.getElementById('f-name').value.trim();
   const vmid  = parseInt(document.getElementById('f-vmid').value, 10);
   const state = document.getElementById('f-state').value;
   const stack = document.getElementById('f-stack').value;
-  const tip   = document.getElementById('f-tailscale-ip').value.trim();
 
   if (!name)        { showToast('name is required', 'error'); return; }
   if (!vmid || vmid < 1) { showToast('a valid vmid is required', 'error'); return; }
 
   const data = {
     name, state, stack, vmid,
-    tailscale_ip:          tip,
+    tailscale_ip:          document.getElementById('f-tailscale-ip').value.trim(),
     atlas:                 +document.getElementById('f-atlas').checked,
     argus:                 +document.getElementById('f-argus').checked,
     semaphore:             +document.getElementById('f-semaphore').checked,
@@ -208,20 +291,19 @@ function saveInstance() {
     hardware_acceleration: +document.getElementById('f-hardware-accel').checked,
   };
 
-  const result = editingId ? updateInstance(editingId, data) : createInstance(data);
+  const result = editingVmid
+    ? await updateInstance(editingVmid, data)
+    : await createInstance(data);
 
-  if (!result.ok) {
-    showToast(result.error.includes('UNIQUE') ? 'vmid already exists' : 'error saving instance', 'error');
-    return;
-  }
+  if (!result.ok) { showToast(result.error, 'error'); return; }
 
-  showToast(`${name} ${editingId ? 'updated' : 'created'}`, 'success');
+  showToast(`${name} ${editingVmid ? 'updated' : 'created'}`, 'success');
   closeModal();
 
   if (currentVmid && document.getElementById('page-detail').classList.contains('active')) {
-    renderDetailPage(vmid);
+    await renderDetailPage(vmid);
   } else {
-    renderDashboard();
+    await renderDashboard();
   }
 }
 
@@ -232,11 +314,10 @@ function confirmDeleteDialog(inst) {
     showToast(`demote ${inst.name} to development before deleting`, 'error');
     return;
   }
-
   document.getElementById('confirm-title').textContent = `delete ${inst.name}?`;
   document.getElementById('confirm-msg').textContent   =
     `This will permanently remove instance "${inst.name}" (vmid: ${inst.vmid}) from Catalyst. This action cannot be undone.`;
-  document.getElementById('confirm-ok').onclick = () => doDelete(inst.id, inst.name);
+  document.getElementById('confirm-ok').onclick = () => doDelete(inst.vmid, inst.name);
   document.getElementById('confirm-overlay').classList.add('open');
 }
 
@@ -244,9 +325,9 @@ function closeConfirm() {
   document.getElementById('confirm-overlay').classList.remove('open');
 }
 
-function doDelete(id, name) {
-  deleteInstance(id);
+async function doDelete(vmid, name) {
   closeConfirm();
+  await deleteInstance(vmid);
   showToast(`${name} deleted`, 'success');
   navigate('dashboard');
 }
@@ -261,18 +342,87 @@ function showToast(msg, type = 'success') {
   toastTimer = setTimeout(() => t.classList.remove('show'), 3000);
 }
 
-// ── Global keyboard handler ───────────────────────────────────────────────────
+// ── Settings Modal ────────────────────────────────────────────────────────────
+
+function openSettingsModal() {
+  const sel = document.getElementById('tz-select');
+  if (!sel.options.length) {
+    for (const { label, tz } of TIMEZONES) {
+      const opt = document.createElement('option');
+      opt.value = tz;
+      opt.textContent = label;
+      sel.appendChild(opt);
+    }
+  }
+  sel.value = getTimezone();
+  document.getElementById('settings-modal').classList.add('open');
+}
+
+function closeSettingsModal() {
+  document.getElementById('settings-modal').classList.remove('open');
+  document.getElementById('import-file').value = '';
+}
+
+async function exportDB() {
+  const res = await fetch('/api/export');
+  const blob = await res.blob();
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = `catalyst-backup-${new Date().toISOString().slice(0, 10)}.json`;
+  a.click();
+  URL.revokeObjectURL(url);
+}
+
+async function importDB() {
+  const file = document.getElementById('import-file').files[0];
+  if (!file) { showToast('Select a backup file first', 'error'); return; }
+  document.getElementById('confirm-title').textContent = 'Replace all instances?';
+  document.getElementById('confirm-msg').textContent =
+    `This will delete all current instances and replace them with the contents of "${file.name}". This cannot be undone.`;
+  document.getElementById('confirm-overlay').classList.add('open');
+  document.getElementById('confirm-ok').onclick = async () => {
+    closeConfirm();
+    try {
+      const { instances, history = [] } = JSON.parse(await file.text());
+      const res = await fetch('/api/import', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ instances, history }),
+      });
+      const data = await res.json();
+      if (!res.ok) { showToast(data.error ?? 'Import failed', 'error'); return; }
+      showToast(`Imported ${data.imported} instance${data.imported !== 1 ? 's' : ''}`, 'success');
+      closeSettingsModal();
+      renderDashboard();
+    } catch {
+      showToast('Invalid backup file', 'error');
+    }
+  };
+}
+
+// ── Keyboard / backdrop ───────────────────────────────────────────────────────
 
 document.addEventListener('keydown', e => {
   if (e.key !== 'Escape') return;
   if (document.getElementById('instance-modal').classList.contains('open'))  { closeModal();         return; }
   if (document.getElementById('confirm-overlay').classList.contains('open')) { closeConfirm();       return; }
+  if (document.getElementById('settings-modal').classList.contains('open'))  { closeSettingsModal(); return; }
 });
 
-// Close modals on backdrop click
 document.getElementById('instance-modal').addEventListener('click', e => {
   if (e.target === document.getElementById('instance-modal')) closeModal();
 });
 document.getElementById('confirm-overlay').addEventListener('click', e => {
   if (e.target === document.getElementById('confirm-overlay')) closeConfirm();
 });
+document.getElementById('settings-modal').addEventListener('click', e => {
+  if (e.target === document.getElementById('settings-modal')) closeSettingsModal();
+});
+
+document.getElementById('tz-select').addEventListener('change', e => {
+  localStorage.setItem('catalyst_tz', e.target.value);
+  const m = window.location.pathname.match(/^\/instance\/(\d+)/);
+  if (m) renderDetailPage(parseInt(m[1], 10));
+  else renderDashboard();
+});

js/version.js

@@ -0,0 +1 @@
+const VERSION = "1.4.0";

nginx.conf

@@ -1,19 +0,0 @@
-server {
-    listen 80;
-    root /usr/share/nginx/html;
-    index index.html;
-
-    # SPA fallback for client-side routing
-    location / {
-        try_files $uri $uri/ /index.html;
-    }
-
-    location ~* \.(css|js)$ {
-        expires 1y;
-        add_header Cache-Control "public, immutable";
-    }
-
-    location = /index.html {
-        add_header Cache-Control "no-store";
-    }
-}

package.json

@@ -1,15 +1,20 @@
 {
   "name": "catalyst",
-  "version": "1.0.3",
+  "version": "1.4.0",
   "type": "module",
   "scripts": {
+    "start": "node server/server.js",
     "test": "vitest run",
     "test:watch": "vitest",
     "version:write": "node -e \"const {version}=JSON.parse(require('fs').readFileSync('package.json','utf8'));require('fs').writeFileSync('js/version.js','const VERSION = \\\"'+version+'\\\";\\n');\""
   },
+  "dependencies": {
+    "express": "^4.18.0",
+    "helmet": "^8.1.0"
+  },
   "devDependencies": {
-    "vitest": "^2.0.0",
-    "sql.js": "^1.10.2",
-    "jsdom": "^25.0.0"
+    "jsdom": "^25.0.0",
+    "supertest": "^7.0.0",
+    "vitest": "^3.2.4"
   }
 }

server/db.js

@@ -0,0 +1,212 @@
+import { DatabaseSync } from 'node:sqlite';
+import { mkdirSync } from 'fs';
+import { dirname, join } from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const DEFAULT_PATH = join(__dirname, '../data/catalyst.db');
+
+let db;
+
+function init(path) {
+  if (path !== ':memory:') {
+    mkdirSync(dirname(path), { recursive: true });
+  }
+  db = new DatabaseSync(path);
+  db.exec('PRAGMA journal_mode = WAL');
+  db.exec('PRAGMA foreign_keys = ON');
+  db.exec('PRAGMA synchronous = NORMAL');
+  createSchema();
+  if (path !== ':memory:') seed();
+}
+
+function createSchema() {
+  db.exec(`
+    CREATE TABLE IF NOT EXISTS instances (
+      id                    INTEGER PRIMARY KEY AUTOINCREMENT,
+      name                  TEXT    NOT NULL CHECK(length(name) BETWEEN 1 AND 100),
+      state                 TEXT    NOT NULL DEFAULT 'deployed'
+                                    CHECK(state IN ('deployed','testing','degraded')),
+      stack                 TEXT    NOT NULL DEFAULT 'development'
+                                    CHECK(stack IN ('production','development')),
+      vmid                  INTEGER NOT NULL UNIQUE CHECK(vmid > 0),
+      atlas                 INTEGER NOT NULL DEFAULT 0 CHECK(atlas IN (0,1)),
+      argus                 INTEGER NOT NULL DEFAULT 0 CHECK(argus IN (0,1)),
+      semaphore             INTEGER NOT NULL DEFAULT 0 CHECK(semaphore IN (0,1)),
+      patchmon              INTEGER NOT NULL DEFAULT 0 CHECK(patchmon IN (0,1)),
+      tailscale             INTEGER NOT NULL DEFAULT 0 CHECK(tailscale IN (0,1)),
+      andromeda             INTEGER NOT NULL DEFAULT 0 CHECK(andromeda IN (0,1)),
+      tailscale_ip          TEXT    NOT NULL DEFAULT '',
+      hardware_acceleration INTEGER NOT NULL DEFAULT 0 CHECK(hardware_acceleration IN (0,1)),
+      created_at            TEXT    NOT NULL DEFAULT (datetime('now')),
+      updated_at            TEXT    NOT NULL DEFAULT (datetime('now'))
+    );
+    CREATE INDEX IF NOT EXISTS idx_instances_state ON instances(state);
+    CREATE INDEX IF NOT EXISTS idx_instances_stack ON instances(stack);
+
+    CREATE TABLE IF NOT EXISTS instance_history (
+      id         INTEGER PRIMARY KEY AUTOINCREMENT,
+      vmid       INTEGER NOT NULL,
+      field      TEXT    NOT NULL,
+      old_value  TEXT,
+      new_value  TEXT,
+      changed_at TEXT    NOT NULL DEFAULT (datetime('now'))
+    );
+    CREATE INDEX IF NOT EXISTS idx_history_vmid ON instance_history(vmid);
+  `);
+}
+
+const SEED = [
+  { name: 'plex',             state: 'deployed',  stack: 'production',  vmid: 117, atlas: 1, argus: 1, semaphore: 0, patchmon: 1, tailscale: 1, andromeda: 0, tailscale_ip: '100.64.0.1',  hardware_acceleration: 1 },
+  { name: 'foldergram',       state: 'testing',   stack: 'development', vmid: 137, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '',            hardware_acceleration: 0 },
+  { name: 'homeassistant',    state: 'deployed',  stack: 'production',  vmid: 102, atlas: 1, argus: 1, semaphore: 1, patchmon: 1, tailscale: 1, andromeda: 0, tailscale_ip: '100.64.0.5',  hardware_acceleration: 0 },
+  { name: 'gitea',            state: 'deployed',  stack: 'production',  vmid: 110, atlas: 1, argus: 0, semaphore: 1, patchmon: 1, tailscale: 1, andromeda: 0, tailscale_ip: '100.64.0.8',  hardware_acceleration: 0 },
+  { name: 'postgres-primary', state: 'degraded',  stack: 'production',  vmid: 201, atlas: 1, argus: 1, semaphore: 0, patchmon: 1, tailscale: 0, andromeda: 1, tailscale_ip: '',            hardware_acceleration: 0 },
+  { name: 'nextcloud',        state: 'testing',   stack: 'development', vmid: 144, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 1, andromeda: 0, tailscale_ip: '100.64.0.12', hardware_acceleration: 0 },
+  { name: 'traefik',          state: 'deployed',  stack: 'production',  vmid: 100, atlas: 1, argus: 1, semaphore: 0, patchmon: 1, tailscale: 1, andromeda: 0, tailscale_ip: '100.64.0.2',  hardware_acceleration: 0 },
+  { name: 'monitoring-stack', state: 'testing',   stack: 'development', vmid: 155, atlas: 0, argus: 0, semaphore: 1, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '',            hardware_acceleration: 0 },
+];
+
+function seed() {
+  const count = db.prepare('SELECT COUNT(*) as n FROM instances').get().n;
+  if (count > 0) return;
+  const insert = db.prepare(`
+    INSERT INTO instances
+      (name, state, stack, vmid, atlas, argus, semaphore, patchmon,
+       tailscale, andromeda, tailscale_ip, hardware_acceleration)
+    VALUES
+      (@name, @state, @stack, @vmid, @atlas, @argus, @semaphore, @patchmon,
+       @tailscale, @andromeda, @tailscale_ip, @hardware_acceleration)
+  `);
+  db.exec('BEGIN');
+  for (const s of SEED) insert.run(s);
+  db.exec('COMMIT');
+}
+
+// ── Queries ───────────────────────────────────────────────────────────────────
+
+export function getInstances(filters = {}) {
+  const parts = ['SELECT * FROM instances WHERE 1=1'];
+  const params = {};
+  if (filters.search) {
+    parts.push('AND (name LIKE @search OR CAST(vmid AS TEXT) LIKE @search OR stack LIKE @search)');
+    params.search = `%${filters.search}%`;
+  }
+  if (filters.state) { parts.push('AND state = @state'); params.state = filters.state; }
+  if (filters.stack) { parts.push('AND stack = @stack'); params.stack = filters.stack; }
+  parts.push('ORDER BY name ASC');
+  return db.prepare(parts.join(' ')).all(params);
+}
+
+export function getInstance(vmid) {
+  return db.prepare('SELECT * FROM instances WHERE vmid = ?').get(vmid) ?? null;
+}
+
+export function getDistinctStacks() {
+  return db.prepare(`SELECT DISTINCT stack FROM instances WHERE stack != '' ORDER BY stack`)
+    .all().map(r => r.stack);
+}
+
+// ── Mutations ─────────────────────────────────────────────────────────────────
+
+const HISTORY_FIELDS = [
+  'name', 'state', 'stack', 'vmid', 'tailscale_ip',
+  'atlas', 'argus', 'semaphore', 'patchmon', 'tailscale', 'andromeda',
+  'hardware_acceleration',
+];
+
+export function createInstance(data) {
+  db.prepare(`
+    INSERT INTO instances
+      (name, state, stack, vmid, atlas, argus, semaphore, patchmon,
+       tailscale, andromeda, tailscale_ip, hardware_acceleration)
+    VALUES
+      (@name, @state, @stack, @vmid, @atlas, @argus, @semaphore, @patchmon,
+       @tailscale, @andromeda, @tailscale_ip, @hardware_acceleration)
+  `).run(data);
+  db.prepare(
+    `INSERT INTO instance_history (vmid, field, old_value, new_value) VALUES (?, 'created', NULL, NULL)`
+  ).run(data.vmid);
+}
+
+export function updateInstance(vmid, data) {
+  const old = getInstance(vmid);
+  db.prepare(`
+    UPDATE instances SET
+      name=@name, state=@state, stack=@stack, vmid=@newVmid,
+      atlas=@atlas, argus=@argus, semaphore=@semaphore, patchmon=@patchmon,
+      tailscale=@tailscale, andromeda=@andromeda, tailscale_ip=@tailscale_ip,
+      hardware_acceleration=@hardware_acceleration, updated_at=datetime('now')
+    WHERE vmid=@vmid
+  `).run({ ...data, newVmid: data.vmid, vmid });
+  const newVmid = data.vmid;
+  const insertEvt = db.prepare(
+    `INSERT INTO instance_history (vmid, field, old_value, new_value) VALUES (?, ?, ?, ?)`
+  );
+  for (const field of HISTORY_FIELDS) {
+    const oldVal = String(old[field] ?? '');
+    const newVal = String(field === 'vmid' ? newVmid : (data[field] ?? ''));
+    if (oldVal !== newVal) insertEvt.run(newVmid, field, oldVal, newVal);
+  }
+}
+
+export function deleteInstance(vmid) {
+  db.prepare('DELETE FROM instance_history WHERE vmid = ?').run(vmid);
+  db.prepare('DELETE FROM instances WHERE vmid = ?').run(vmid);
+}
+
+export function importInstances(rows, historyRows = []) {
+  db.exec('BEGIN');
+  db.exec('DELETE FROM instance_history');
+  db.exec('DELETE FROM instances');
+  const insert = db.prepare(`
+    INSERT INTO instances
+      (name, state, stack, vmid, atlas, argus, semaphore, patchmon,
+       tailscale, andromeda, tailscale_ip, hardware_acceleration)
+    VALUES
+      (@name, @state, @stack, @vmid, @atlas, @argus, @semaphore, @patchmon,
+       @tailscale, @andromeda, @tailscale_ip, @hardware_acceleration)
+  `);
+  for (const row of rows) insert.run(row);
+  if (historyRows.length) {
+    const insertHist = db.prepare(
+      `INSERT INTO instance_history (vmid, field, old_value, new_value, changed_at) VALUES (?, ?, ?, ?, ?)`
+    );
+    for (const h of historyRows) insertHist.run(h.vmid, h.field, h.old_value ?? null, h.new_value ?? null, h.changed_at);
+  }
+  db.exec('COMMIT');
+}
+
+export function getInstanceHistory(vmid) {
+  return db.prepare(
+    'SELECT * FROM instance_history WHERE vmid = ? ORDER BY changed_at DESC'
+  ).all(vmid);
+}
+
+export function getAllHistory() {
+  return db.prepare('SELECT * FROM instance_history ORDER BY vmid, changed_at').all();
+}
+
+// ── Test helpers ──────────────────────────────────────────────────────────────
+
+export function _resetForTest() {
+  if (db) db.close();
+  init(':memory:');
+}
+
+// ── Boot ──────────────────────────────────────────────────────────────────────
+// Skipped in test environment — parallel Vitest workers would race to open
+// the same file, causing "database is locked". _resetForTest() in beforeEach
+// handles initialisation for every test worker using :memory: instead.
+
+if (process.env.NODE_ENV !== 'test') {
+  const DB_PATH = process.env.DB_PATH ?? DEFAULT_PATH;
+  try {
+    init(DB_PATH);
+  } catch (e) {
+    console.error('[catalyst] fatal: could not open database at', DB_PATH);
+    console.error('[catalyst] ensure the data directory exists and is writable by the server process.');
+    console.error(e);
+    process.exit(1);
+  }
+}

server/routes.js

@@ -0,0 +1,162 @@
+import { Router } from 'express';
+import {
+  getInstances, getInstance, getDistinctStacks,
+  createInstance, updateInstance, deleteInstance, importInstances, getInstanceHistory, getAllHistory,
+} from './db.js';
+
+export const router = Router();
+
+// ── Validation ────────────────────────────────────────────────────────────────
+
+const VALID_STATES  = ['deployed', 'testing', 'degraded'];
+const VALID_STACKS  = ['production', 'development'];
+const SERVICE_KEYS  = ['atlas', 'argus', 'semaphore', 'patchmon', 'tailscale', 'andromeda'];
+
+function validate(body) {
+  const errors = [];
+  if (!body.name || typeof body.name !== 'string' || !body.name.trim())
+    errors.push('name is required');
+  if (!Number.isInteger(body.vmid) || body.vmid < 1)
+    errors.push('vmid must be a positive integer');
+  if (!VALID_STATES.includes(body.state))
+    errors.push(`state must be one of: ${VALID_STATES.join(', ')}`);
+  if (!VALID_STACKS.includes(body.stack))
+    errors.push(`stack must be one of: ${VALID_STACKS.join(', ')}`);
+  const ip = (body.tailscale_ip ?? '').trim();
+  if (ip && !/^(\d{1,3}\.){3}\d{1,3}$/.test(ip))
+    errors.push('tailscale_ip must be a valid IPv4 address or empty');
+  return errors;
+}
+
+function handleDbError(context, e, res) {
+  if (e.message.includes('UNIQUE')) return res.status(409).json({ error: 'vmid already exists' });
+  if (e.message.includes('CHECK'))  return res.status(400).json({ error: 'invalid field value' });
+  console.error(context, e);
+  res.status(500).json({ error: 'internal server error' });
+}
+
+function normalise(body) {
+  const row = {
+    name:                  (body.name ?? '').trim(),
+    state:                 body.state,
+    stack:                 body.stack,
+    vmid:                  body.vmid,
+    tailscale_ip:          (body.tailscale_ip ?? '').trim(),
+    hardware_acceleration: body.hardware_acceleration ? 1 : 0,
+  };
+  for (const svc of SERVICE_KEYS) row[svc] = body[svc] ? 1 : 0;
+  return row;
+}
+
+// ── Routes ────────────────────────────────────────────────────────────────────
+
+// GET /api/instances/stacks — must be declared before /:vmid
+router.get('/instances/stacks', (_req, res) => {
+  res.json(getDistinctStacks());
+});
+
+// GET /api/instances
+router.get('/instances', (req, res) => {
+  const { search, state, stack } = req.query;
+  res.json(getInstances({ search, state, stack }));
+});
+
+// GET /api/instances/:vmid/history
+router.get('/instances/:vmid/history', (req, res) => {
+  const vmid = parseInt(req.params.vmid, 10);
+  if (!vmid) return res.status(400).json({ error: 'invalid vmid' });
+  if (!getInstance(vmid)) return res.status(404).json({ error: 'instance not found' });
+  res.json(getInstanceHistory(vmid));
+});
+
+// GET /api/instances/:vmid
+router.get('/instances/:vmid', (req, res) => {
+  const vmid = parseInt(req.params.vmid, 10);
+  if (!vmid) return res.status(400).json({ error: 'invalid vmid' });
+
+  const instance = getInstance(vmid);
+  if (!instance) return res.status(404).json({ error: 'instance not found' });
+
+  res.json(instance);
+});
+
+// POST /api/instances
+router.post('/instances', (req, res) => {
+  const errors = validate(req.body);
+  if (errors.length) return res.status(400).json({ errors });
+
+  try {
+    const data = normalise(req.body);
+    createInstance(data);
+    const created = getInstance(data.vmid);
+    res.status(201).json(created);
+  } catch (e) {
+    handleDbError('POST /api/instances', e, res);
+  }
+});
+
+// PUT /api/instances/:vmid
+router.put('/instances/:vmid', (req, res) => {
+  const vmid = parseInt(req.params.vmid, 10);
+  if (!vmid) return res.status(400).json({ error: 'invalid vmid' });
+  if (!getInstance(vmid)) return res.status(404).json({ error: 'instance not found' });
+
+  const errors = validate(req.body);
+  if (errors.length) return res.status(400).json({ errors });
+
+  try {
+    const data = normalise(req.body);
+    updateInstance(vmid, data);
+    res.json(getInstance(data.vmid));
+  } catch (e) {
+    handleDbError('PUT /api/instances/:vmid', e, res);
+  }
+});
+
+// GET /api/export
+router.get('/export', (_req, res) => {
+  const instances = getInstances();
+  const history = getAllHistory();
+  const date = new Date().toISOString().slice(0, 10);
+  res.setHeader('Content-Disposition', `attachment; filename="catalyst-backup-${date}.json"`);
+  res.json({ version: 2, exported_at: new Date().toISOString(), instances, history });
+});
+
+// POST /api/import
+router.post('/import', (req, res) => {
+  const { instances, history = [] } = req.body ?? {};
+  if (!Array.isArray(instances)) {
+    return res.status(400).json({ error: 'body must contain an instances array' });
+  }
+  const errors = [];
+  for (const [i, row] of instances.entries()) {
+    const errs = validate(normalise(row));
+    if (errs.length) errors.push({ index: i, errors: errs });
+  }
+  if (errors.length) return res.status(400).json({ errors });
+  try {
+    importInstances(instances.map(normalise), Array.isArray(history) ? history : []);
+    res.json({ imported: instances.length });
+  } catch (e) {
+    console.error('POST /api/import', e);
+    res.status(500).json({ error: 'internal server error' });
+  }
+});
+
+// DELETE /api/instances/:vmid
+router.delete('/instances/:vmid', (req, res) => {
+  const vmid = parseInt(req.params.vmid, 10);
+  if (!vmid) return res.status(400).json({ error: 'invalid vmid' });
+
+  const instance = getInstance(vmid);
+  if (!instance) return res.status(404).json({ error: 'instance not found' });
+  if (instance.stack !== 'development')
+    return res.status(422).json({ error: 'only development instances can be deleted' });
+
+  try {
+    deleteInstance(vmid);
+    res.status(204).end();
+  } catch (e) {
+    handleDbError('DELETE /api/instances/:vmid', e, res);
+  }
+});

server/server.js

@@ -0,0 +1,51 @@
+import express from 'express';
+import helmet from 'helmet';
+import { fileURLToPath } from 'url';
+import { dirname, join } from 'path';
+import { router } from './routes.js';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const PORT = process.env.PORT ?? 3000;
+
+export const app = express();
+
+app.use(helmet({
+  contentSecurityPolicy: {
+    useDefaults: false, // explicit — upgrade-insecure-requests breaks HTTP deployments
+    directives: {
+      'default-src':     ["'self'"],
+      'base-uri':        ["'self'"],
+      'font-src':        ["'self'", 'https://fonts.gstatic.com'],
+      'form-action':     ["'self'"],
+      'frame-ancestors': ["'self'"],
+      'img-src':         ["'self'", 'data:'],
+      'object-src':      ["'none'"],
+      'script-src':      ["'self'"],
+      'script-src-attr': ["'unsafe-inline'"], // allow onclick handlers
+      'style-src':       ["'self'", 'https://fonts.googleapis.com'],
+    },
+  },
+}));
+app.use(express.json());
+
+// API
+app.use('/api', router);
+
+// Static files
+app.use(express.static(join(__dirname, '..')));
+
+// SPA fallback — all non-API, non-asset routes serve index.html
+app.get('*', (req, res) => {
+  res.sendFile(join(__dirname, '../index.html'));
+});
+
+// Error handler
+app.use((err, _req, res, _next) => {
+  console.error(err);
+  res.status(500).json({ error: 'internal server error' });
+});
+
+// Boot — only when run directly, not when imported by tests
+if (process.argv[1] === fileURLToPath(import.meta.url)) {
+  app.listen(PORT, () => console.log(`catalyst on :${PORT}`));
+}

tests/api.test.js

@@ -0,0 +1,455 @@
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
+import request from 'supertest'
+import { app } from '../server/server.js'
+import { _resetForTest } from '../server/db.js'
+import * as dbModule from '../server/db.js'
+
+beforeEach(() => _resetForTest())
+
+const base = {
+  name: 'traefik',
+  vmid: 100,
+  state: 'deployed',
+  stack: 'production',
+  atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0,
+  tailscale_ip: '',
+  hardware_acceleration: 0,
+}
+
+// ── GET /api/instances ────────────────────────────────────────────────────────
+
+describe('GET /api/instances', () => {
+  it('returns empty array when no instances exist', async () => {
+    const res = await request(app).get('/api/instances')
+    expect(res.status).toBe(200)
+    expect(res.body).toEqual([])
+  })
+
+  it('returns all instances sorted by name', async () => {
+    await request(app).post('/api/instances').send({ ...base, vmid: 1, name: 'zebra' })
+    await request(app).post('/api/instances').send({ ...base, vmid: 2, name: 'alpha' })
+    const res = await request(app).get('/api/instances')
+    expect(res.status).toBe(200)
+    expect(res.body).toHaveLength(2)
+    expect(res.body[0].name).toBe('alpha')
+    expect(res.body[1].name).toBe('zebra')
+  })
+
+  it('filters by state', async () => {
+    await request(app).post('/api/instances').send({ ...base, vmid: 1, name: 'a', state: 'deployed' })
+    await request(app).post('/api/instances').send({ ...base, vmid: 2, name: 'b', state: 'degraded' })
+    const res = await request(app).get('/api/instances?state=deployed')
+    expect(res.body).toHaveLength(1)
+    expect(res.body[0].name).toBe('a')
+  })
+
+  it('filters by stack', async () => {
+    await request(app).post('/api/instances').send({ ...base, vmid: 1, name: 'a', stack: 'production' })
+    await request(app).post('/api/instances').send({ ...base, vmid: 2, name: 'b', stack: 'development', state: 'testing' })
+    const res = await request(app).get('/api/instances?stack=development')
+    expect(res.body).toHaveLength(1)
+    expect(res.body[0].name).toBe('b')
+  })
+
+  it('searches by name substring', async () => {
+    await request(app).post('/api/instances').send({ ...base, vmid: 1, name: 'plex' })
+    await request(app).post('/api/instances').send({ ...base, vmid: 2, name: 'gitea' })
+    const res = await request(app).get('/api/instances?search=ple')
+    expect(res.body).toHaveLength(1)
+    expect(res.body[0].name).toBe('plex')
+  })
+
+  it('searches by vmid', async () => {
+    await request(app).post('/api/instances').send({ ...base, vmid: 137, name: 'a' })
+    await request(app).post('/api/instances').send({ ...base, vmid: 200, name: 'b' })
+    const res = await request(app).get('/api/instances?search=137')
+    expect(res.body).toHaveLength(1)
+    expect(res.body[0].vmid).toBe(137)
+  })
+
+  it('combines search and state filters', async () => {
+    await request(app).post('/api/instances').send({ ...base, vmid: 1, name: 'plex', state: 'deployed' })
+    await request(app).post('/api/instances').send({ ...base, vmid: 2, name: 'plex2', state: 'degraded' })
+    const res = await request(app).get('/api/instances?search=plex&state=deployed')
+    expect(res.body).toHaveLength(1)
+    expect(res.body[0].name).toBe('plex')
+  })
+})
+
+// ── GET /api/instances/stacks ─────────────────────────────────────────────────
+
+describe('GET /api/instances/stacks', () => {
+  it('returns empty array when no instances exist', async () => {
+    const res = await request(app).get('/api/instances/stacks')
+    expect(res.status).toBe(200)
+    expect(res.body).toEqual([])
+  })
+
+  it('returns unique stacks sorted alphabetically', async () => {
+    await request(app).post('/api/instances').send({ ...base, vmid: 1, name: 'a', stack: 'production' })
+    await request(app).post('/api/instances').send({ ...base, vmid: 2, name: 'b', stack: 'development', state: 'testing' })
+    await request(app).post('/api/instances').send({ ...base, vmid: 3, name: 'c', stack: 'production' })
+    const res = await request(app).get('/api/instances/stacks')
+    expect(res.body).toEqual(['development', 'production'])
+  })
+})
+
+// ── GET /api/instances/:vmid ──────────────────────────────────────────────────
+
+describe('GET /api/instances/:vmid', () => {
+  it('returns the instance for a known vmid', async () => {
+    await request(app).post('/api/instances').send({ ...base, vmid: 117, name: 'plex' })
+    const res = await request(app).get('/api/instances/117')
+    expect(res.status).toBe(200)
+    expect(res.body.name).toBe('plex')
+    expect(res.body.vmid).toBe(117)
+  })
+
+  it('returns 404 for unknown vmid', async () => {
+    const res = await request(app).get('/api/instances/999')
+    expect(res.status).toBe(404)
+    expect(res.body.error).toBeDefined()
+  })
+
+  it('returns 400 for non-numeric vmid', async () => {
+    const res = await request(app).get('/api/instances/abc')
+    expect(res.status).toBe(400)
+  })
+})
+
+// ── POST /api/instances ───────────────────────────────────────────────────────
+
+describe('POST /api/instances', () => {
+  it('creates an instance and returns 201 with the created record', async () => {
+    const res = await request(app).post('/api/instances').send(base)
+    expect(res.status).toBe(201)
+    expect(res.body.name).toBe('traefik')
+    expect(res.body.vmid).toBe(100)
+    expect(res.body.created_at).not.toBeNull()
+    expect(res.body.updated_at).not.toBeNull()
+  })
+
+  it('stores service flags correctly', async () => {
+    const res = await request(app).post('/api/instances').send({ ...base, atlas: 1, tailscale: 1, hardware_acceleration: 1 })
+    expect(res.body.atlas).toBe(1)
+    expect(res.body.tailscale).toBe(1)
+    expect(res.body.hardware_acceleration).toBe(1)
+    expect(res.body.argus).toBe(0)
+  })
+
+  it('returns 409 for duplicate vmid', async () => {
+    await request(app).post('/api/instances').send(base)
+    const res = await request(app).post('/api/instances').send({ ...base, name: 'other' })
+    expect(res.status).toBe(409)
+    expect(res.body.error).toMatch(/vmid/)
+  })
+
+  it('returns 400 when name is missing', async () => {
+    const res = await request(app).post('/api/instances').send({ ...base, name: '' })
+    expect(res.status).toBe(400)
+    expect(res.body.errors).toBeInstanceOf(Array)
+  })
+
+  it('returns 400 for vmid less than 1', async () => {
+    const res = await request(app).post('/api/instances').send({ ...base, vmid: 0 })
+    expect(res.status).toBe(400)
+    expect(res.body.errors).toBeInstanceOf(Array)
+  })
+
+  it('returns 400 for invalid state', async () => {
+    const res = await request(app).post('/api/instances').send({ ...base, state: 'invalid' })
+    expect(res.status).toBe(400)
+  })
+
+  it('returns 400 for invalid stack', async () => {
+    const res = await request(app).post('/api/instances').send({ ...base, stack: 'invalid' })
+    expect(res.status).toBe(400)
+  })
+
+  it('trims whitespace from name', async () => {
+    const res = await request(app).post('/api/instances').send({ ...base, name: '  plex  ' })
+    expect(res.status).toBe(201)
+    expect(res.body.name).toBe('plex')
+  })
+})
+
+// ── PUT /api/instances/:vmid ──────────────────────────────────────────────────
+
+describe('PUT /api/instances/:vmid', () => {
+  it('updates fields and returns the updated record', async () => {
+    await request(app).post('/api/instances').send(base)
+    const res = await request(app).put('/api/instances/100').send({ ...base, name: 'updated', state: 'degraded' })
+    expect(res.status).toBe(200)
+    expect(res.body.name).toBe('updated')
+    expect(res.body.state).toBe('degraded')
+  })
+
+  it('can change the vmid', async () => {
+    await request(app).post('/api/instances').send(base)
+    await request(app).put('/api/instances/100').send({ ...base, vmid: 200 })
+    expect((await request(app).get('/api/instances/100')).status).toBe(404)
+    expect((await request(app).get('/api/instances/200')).status).toBe(200)
+  })
+
+  it('returns 404 for unknown vmid', async () => {
+    const res = await request(app).put('/api/instances/999').send(base)
+    expect(res.status).toBe(404)
+  })
+
+  it('returns 400 for validation errors', async () => {
+    await request(app).post('/api/instances').send(base)
+    const res = await request(app).put('/api/instances/100').send({ ...base, name: '' })
+    expect(res.status).toBe(400)
+    expect(res.body.errors).toBeInstanceOf(Array)
+  })
+
+  it('returns 409 when new vmid conflicts with an existing instance', async () => {
+    await request(app).post('/api/instances').send({ ...base, vmid: 100, name: 'a' })
+    await request(app).post('/api/instances').send({ ...base, vmid: 200, name: 'b' })
+    const res = await request(app).put('/api/instances/100').send({ ...base, vmid: 200 })
+    expect(res.status).toBe(409)
+  })
+})
+
+// ── DELETE /api/instances/:vmid ───────────────────────────────────────────────
+
+describe('DELETE /api/instances/:vmid', () => {
+  it('deletes a development instance and returns 204', async () => {
+    await request(app).post('/api/instances').send({ ...base, stack: 'development', state: 'testing' })
+    const res = await request(app).delete('/api/instances/100')
+    expect(res.status).toBe(204)
+    expect((await request(app).get('/api/instances/100')).status).toBe(404)
+  })
+
+  it('returns 422 when attempting to delete a production instance', async () => {
+    await request(app).post('/api/instances').send({ ...base, stack: 'production' })
+    const res = await request(app).delete('/api/instances/100')
+    expect(res.status).toBe(422)
+    expect(res.body.error).toMatch(/development/)
+  })
+
+  it('returns 404 for unknown vmid', async () => {
+    const res = await request(app).delete('/api/instances/999')
+    expect(res.status).toBe(404)
+  })
+
+  it('returns 400 for non-numeric vmid', async () => {
+    const res = await request(app).delete('/api/instances/abc')
+    expect(res.status).toBe(400)
+  })
+})
+
+// ── GET /api/instances/:vmid/history ─────────────────────────────────────────
+
+describe('GET /api/instances/:vmid/history', () => {
+  it('returns history events for a known vmid', async () => {
+    await request(app).post('/api/instances').send(base)
+    const res = await request(app).get('/api/instances/100/history')
+    expect(res.status).toBe(200)
+    expect(res.body).toBeInstanceOf(Array)
+    expect(res.body[0].field).toBe('created')
+  })
+
+  it('returns 404 for unknown vmid', async () => {
+    expect((await request(app).get('/api/instances/999/history')).status).toBe(404)
+  })
+
+  it('returns 400 for non-numeric vmid', async () => {
+    expect((await request(app).get('/api/instances/abc/history')).status).toBe(400)
+  })
+})
+
+// ── GET /api/export ───────────────────────────────────────────────────────────
+
+describe('GET /api/export', () => {
+  it('returns 200 with instances array and attachment header', async () => {
+    await request(app).post('/api/instances').send(base)
+    const res = await request(app).get('/api/export')
+    expect(res.status).toBe(200)
+    expect(res.headers['content-disposition']).toMatch(/attachment/)
+    expect(res.body.instances).toHaveLength(1)
+    expect(res.body.instances[0].name).toBe('traefik')
+  })
+
+  it('returns empty instances array when no data', async () => {
+    const res = await request(app).get('/api/export')
+    expect(res.body.instances).toEqual([])
+  })
+
+  it('returns version 2', async () => {
+    const res = await request(app).get('/api/export')
+    expect(res.body.version).toBe(2)
+  })
+
+  it('includes a history array', async () => {
+    await request(app).post('/api/instances').send(base)
+    const res = await request(app).get('/api/export')
+    expect(res.body.history).toBeInstanceOf(Array)
+    expect(res.body.history.some(e => e.field === 'created')).toBe(true)
+  })
+})
+
+// ── POST /api/import ──────────────────────────────────────────────────────────
+
+describe('POST /api/import', () => {
+  it('replaces all instances and returns imported count', async () => {
+    await request(app).post('/api/instances').send(base)
+    const res = await request(app).post('/api/import')
+      .send({ instances: [{ ...base, vmid: 999, name: 'imported' }] })
+    expect(res.status).toBe(200)
+    expect(res.body.imported).toBe(1)
+    expect((await request(app).get('/api/instances')).body[0].name).toBe('imported')
+  })
+
+  it('returns 400 if instances is not an array', async () => {
+    expect((await request(app).post('/api/import').send({ instances: 'bad' })).status).toBe(400)
+  })
+
+  it('returns 400 with per-row errors for invalid rows', async () => {
+    const res = await request(app).post('/api/import')
+      .send({ instances: [{ ...base, name: '', vmid: 1 }] })
+    expect(res.status).toBe(400)
+    expect(res.body.errors[0].index).toBe(0)
+  })
+
+  it('returns 400 if body has no instances key', async () => {
+    expect((await request(app).post('/api/import').send({})).status).toBe(400)
+  })
+
+  it('returns 400 (not 500) when a row is missing name', async () => {
+    const res = await request(app).post('/api/import')
+      .send({ instances: [{ ...base, name: undefined, vmid: 1 }] })
+    expect(res.status).toBe(400)
+  })
+
+  it('restores history when history array is provided', async () => {
+    await request(app).post('/api/instances').send(base)
+    const exp = await request(app).get('/api/export')
+    await request(app).post('/api/instances').send({ ...base, vmid: 999, name: 'other' })
+    const res = await request(app).post('/api/import').send({
+      instances: exp.body.instances,
+      history: exp.body.history,
+    })
+    expect(res.status).toBe(200)
+    const hist = await request(app).get('/api/instances/100/history')
+    expect(hist.body.some(e => e.field === 'created')).toBe(true)
+  })
+
+  it('succeeds with a v1 backup that has no history key', async () => {
+    const res = await request(app).post('/api/import')
+      .send({ instances: [{ ...base, vmid: 1, name: 'legacy' }] })
+    expect(res.status).toBe(200)
+    expect(res.body.imported).toBe(1)
+  })
+})
+
+// ── Static assets & SPA routing ───────────────────────────────────────────────
+
+describe('static assets and SPA routing', () => {
+  it('serves index.html at root', async () => {
+    const res = await request(app).get('/')
+    expect(res.status).toBe(200)
+    expect(res.headers['content-type']).toMatch(/html/)
+  })
+
+  it('serves index.html for deep SPA routes (e.g. /instance/117)', async () => {
+    const res = await request(app).get('/instance/117')
+    expect(res.status).toBe(200)
+    expect(res.headers['content-type']).toMatch(/html/)
+  })
+
+  it('serves CSS with correct content-type (not sniffed as HTML)', async () => {
+    const res = await request(app).get('/css/app.css')
+    expect(res.status).toBe(200)
+    expect(res.headers['content-type']).toMatch(/text\/css/)
+  })
+
+  it('does not set upgrade-insecure-requests in CSP (HTTP deployments must work)', async () => {
+    const res = await request(app).get('/')
+    const csp = res.headers['content-security-policy'] ?? ''
+    expect(csp).not.toContain('upgrade-insecure-requests')
+  })
+
+  it('allows inline event handlers in CSP (onclick attributes)', async () => {
+    const res = await request(app).get('/')
+    const csp = res.headers['content-security-policy'] ?? ''
+    // script-src-attr must not be 'none' — that blocks onclick handlers
+    expect(csp).not.toContain("script-src-attr 'none'")
+  })
+
+  it('index.html contains base href / for correct asset resolution on deep routes', async () => {
+    const res = await request(app).get('/')
+    expect(res.text).toContain('<base href="/">')
+  })
+})
+
+// ── Error handling — unexpected DB failures ───────────────────────────────────
+
+const dbError = () => Object.assign(
+  new Error('attempt to write a readonly database'),
+  { code: 'ERR_SQLITE_ERROR', errcode: 8 }
+)
+
+describe('error handling — unexpected DB failures', () => {
+  let consoleSpy
+
+  beforeEach(() => {
+    consoleSpy = vi.spyOn(console, 'error').mockImplementation(() => {})
+  })
+
+  afterEach(() => {
+    vi.restoreAllMocks()
+  })
+
+  it('POST returns 500 with friendly message when DB throws unexpectedly', async () => {
+    vi.spyOn(dbModule, 'createInstance').mockImplementationOnce(() => { throw dbError() })
+    const res = await request(app).post('/api/instances').send(base)
+    expect(res.status).toBe(500)
+    expect(res.body).toEqual({ error: 'internal server error' })
+  })
+
+  it('POST logs the error with route context when DB throws unexpectedly', async () => {
+    vi.spyOn(dbModule, 'createInstance').mockImplementationOnce(() => { throw dbError() })
+    await request(app).post('/api/instances').send(base)
+    expect(consoleSpy).toHaveBeenCalledWith(
+      expect.stringContaining('POST /api/instances'),
+      expect.any(Error)
+    )
+  })
+
+  it('PUT returns 500 with friendly message when DB throws unexpectedly', async () => {
+    await request(app).post('/api/instances').send(base)
+    vi.spyOn(dbModule, 'updateInstance').mockImplementationOnce(() => { throw dbError() })
+    const res = await request(app).put('/api/instances/100').send(base)
+    expect(res.status).toBe(500)
+    expect(res.body).toEqual({ error: 'internal server error' })
+  })
+
+  it('PUT logs the error with route context when DB throws unexpectedly', async () => {
+    await request(app).post('/api/instances').send(base)
+    vi.spyOn(dbModule, 'updateInstance').mockImplementationOnce(() => { throw dbError() })
+    await request(app).put('/api/instances/100').send(base)
+    expect(consoleSpy).toHaveBeenCalledWith(
+      expect.stringContaining('PUT /api/instances/:vmid'),
+      expect.any(Error)
+    )
+  })
+
+  it('DELETE returns 500 with friendly message when DB throws unexpectedly', async () => {
+    await request(app).post('/api/instances').send({ ...base, stack: 'development', state: 'testing' })
+    vi.spyOn(dbModule, 'deleteInstance').mockImplementationOnce(() => { throw dbError() })
+    const res = await request(app).delete('/api/instances/100')
+    expect(res.status).toBe(500)
+    expect(res.body).toEqual({ error: 'internal server error' })
+  })
+
+  it('DELETE logs the error with route context when DB throws unexpectedly', async () => {
+    await request(app).post('/api/instances').send({ ...base, stack: 'development', state: 'testing' })
+    vi.spyOn(dbModule, 'deleteInstance').mockImplementationOnce(() => { throw dbError() })
+    await request(app).delete('/api/instances/100')
+    expect(consoleSpy).toHaveBeenCalledWith(
+      expect.stringContaining('DELETE /api/instances/:vmid'),
+      expect.any(Error)
+    )
+  })
+})

tests/db.test.js

@@ -1,250 +1,271 @@
 import { describe, it, expect, beforeEach } from 'vitest'
-import initSqlJs from 'sql.js'
+import {
+  _resetForTest,
+  getInstances, getInstance, getDistinctStacks,
+  createInstance, updateInstance, deleteInstance, importInstances, getInstanceHistory,
+} from '../server/db.js'
 
-// ── Schema (mirrors db.js) ────────────────────────────────────────────────────
+beforeEach(() => _resetForTest());
 
-const SCHEMA = `
-  CREATE TABLE instances (
-    id                    INTEGER PRIMARY KEY AUTOINCREMENT,
-    name                  TEXT    NOT NULL,
-    state                 TEXT    DEFAULT 'deployed',
-    stack                 TEXT    DEFAULT '',
-    vmid                  INTEGER UNIQUE NOT NULL,
-    atlas                 INTEGER DEFAULT 0,
-    argus                 INTEGER DEFAULT 0,
-    semaphore             INTEGER DEFAULT 0,
-    patchmon              INTEGER DEFAULT 0,
-    tailscale             INTEGER DEFAULT 0,
-    andromeda             INTEGER DEFAULT 0,
-    tailscale_ip          TEXT    DEFAULT '',
-    hardware_acceleration INTEGER DEFAULT 0,
-    createdAt             TEXT    DEFAULT (datetime('now')),
-    updatedAt             TEXT    DEFAULT (datetime('now'))
-  )
-`
-
-// ── Helpers ───────────────────────────────────────────────────────────────────
-
-let db
-
-beforeEach(async () => {
-  const SQL = await initSqlJs()
-  db = new SQL.Database()
-  db.run(SCHEMA)
-})
-
-function rows(res) {
-  if (!res.length) return []
-  const cols = res[0].columns
-  return res[0].values.map(row => Object.fromEntries(cols.map((c, i) => [c, row[i]])))
-}
-
-function insert(overrides = {}) {
-  const defaults = {
-    name: 'test-instance', state: 'deployed', stack: 'production', vmid: 100,
-    atlas: 0, argus: 0, semaphore: 0, patchmon: 0,
-    tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0,
-  }
-  const d = { ...defaults, ...overrides }
-  db.run(
-    `INSERT INTO instances
-      (name, state, stack, vmid, atlas, argus, semaphore, patchmon, tailscale, andromeda, tailscale_ip, hardware_acceleration)
-     VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
-    [d.name, d.state, d.stack, d.vmid, d.atlas, d.argus, d.semaphore,
-     d.patchmon, d.tailscale, d.andromeda, d.tailscale_ip, d.hardware_acceleration]
-  )
-  return d
-}
-
-function getInstances(filters = {}) {
-  let sql = 'SELECT * FROM instances WHERE 1=1'
-  const params = []
-  if (filters.search) {
-    sql += ' AND (name LIKE ? OR CAST(vmid AS TEXT) LIKE ? OR stack LIKE ?)'
-    const s = `%${filters.search}%`
-    params.push(s, s, s)
-  }
-  if (filters.state) { sql += ' AND state = ?'; params.push(filters.state) }
-  if (filters.stack) { sql += ' AND stack = ?'; params.push(filters.stack) }
-  sql += ' ORDER BY name ASC'
-  return rows(db.exec(sql, params))
-}
-
-function getInstance(vmid) {
-  const res = rows(db.exec('SELECT * FROM instances WHERE vmid = ?', [vmid]))
-  return res[0] ?? null
-}
-
-function getDistinctStacks() {
-  const res = db.exec(`SELECT DISTINCT stack FROM instances WHERE stack != '' ORDER BY stack`)
-  if (!res.length) return []
-  return res[0].values.map(r => r[0])
-}
-
-// ── Tests ─────────────────────────────────────────────────────────────────────
+// ── getInstances ──────────────────────────────────────────────────────────────
 
 describe('getInstances', () => {
-  it('returns empty array when no instances exist', () => {
-    expect(getInstances()).toEqual([])
-  })
+  it('returns empty array when table is empty', () => {
+    expect(getInstances()).toEqual([]);
+  });
 
   it('returns all instances sorted by name', () => {
-    insert({ name: 'zebra', vmid: 1 })
-    insert({ name: 'alpha', vmid: 2 })
-    const result = getInstances()
-    expect(result).toHaveLength(2)
-    expect(result[0].name).toBe('alpha')
-    expect(result[1].name).toBe('zebra')
-  })
+    createInstance({ name: 'zebra', state: 'deployed', stack: 'production', vmid: 1, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    createInstance({ name: 'alpha', state: 'deployed', stack: 'production', vmid: 2, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    const result = getInstances();
+    expect(result[0].name).toBe('alpha');
+    expect(result[1].name).toBe('zebra');
+  });
 
   it('filters by state', () => {
-    insert({ name: 'a', vmid: 1, state: 'deployed' })
-    insert({ name: 'b', vmid: 2, state: 'degraded' })
-    insert({ name: 'c', vmid: 3, state: 'testing' })
-    expect(getInstances({ state: 'deployed' })).toHaveLength(1)
-    expect(getInstances({ state: 'degraded' })).toHaveLength(1)
-    expect(getInstances({ state: 'testing' })).toHaveLength(1)
-  })
+    createInstance({ name: 'a', state: 'deployed',  stack: 'production',  vmid: 1, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    createInstance({ name: 'b', state: 'degraded',  stack: 'production',  vmid: 2, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    createInstance({ name: 'c', state: 'testing',   stack: 'development', vmid: 3, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    expect(getInstances({ state: 'deployed' })).toHaveLength(1);
+    expect(getInstances({ state: 'degraded' })).toHaveLength(1);
+    expect(getInstances({ state: 'testing'  })).toHaveLength(1);
+  });
 
   it('filters by stack', () => {
-    insert({ name: 'a', vmid: 1, stack: 'production' })
-    insert({ name: 'b', vmid: 2, stack: 'development' })
-    expect(getInstances({ stack: 'production' })).toHaveLength(1)
-    expect(getInstances({ stack: 'development' })).toHaveLength(1)
-  })
+    createInstance({ name: 'a', state: 'deployed', stack: 'production',  vmid: 1, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    createInstance({ name: 'b', state: 'testing',  stack: 'development', vmid: 2, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    expect(getInstances({ stack: 'production'  })).toHaveLength(1);
+    expect(getInstances({ stack: 'development' })).toHaveLength(1);
+  });
 
   it('searches by name', () => {
-    insert({ name: 'plex', vmid: 1 })
-    insert({ name: 'gitea', vmid: 2 })
-    expect(getInstances({ search: 'ple' })).toHaveLength(1)
-    expect(getInstances({ search: 'ple' })[0].name).toBe('plex')
-  })
+    createInstance({ name: 'plex',  state: 'deployed', stack: 'production', vmid: 1, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    createInstance({ name: 'gitea', state: 'deployed', stack: 'production', vmid: 2, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    expect(getInstances({ search: 'ple' })).toHaveLength(1);
+    expect(getInstances({ search: 'ple' })[0].name).toBe('plex');
+  });
 
   it('searches by vmid', () => {
-    insert({ name: 'a', vmid: 137 })
-    insert({ name: 'b', vmid: 200 })
-    expect(getInstances({ search: '137' })).toHaveLength(1)
-  })
+    createInstance({ name: 'a', state: 'deployed', stack: 'production', vmid: 137, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    createInstance({ name: 'b', state: 'deployed', stack: 'production', vmid: 200, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    expect(getInstances({ search: '137' })).toHaveLength(1);
+  });
 
-  it('searches by stack', () => {
-    insert({ name: 'a', vmid: 1, stack: 'production' })
-    insert({ name: 'b', vmid: 2, stack: 'development' })
-    expect(getInstances({ search: 'prod' })).toHaveLength(1)
-  })
+  it('combines filters', () => {
+    createInstance({ name: 'plex',  state: 'deployed', stack: 'production', vmid: 1, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    createInstance({ name: 'plex2', state: 'degraded', stack: 'production', vmid: 2, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    expect(getInstances({ search: 'plex', state: 'deployed' })).toHaveLength(1);
+  });
+});
 
-  it('combines search and state filters', () => {
-    insert({ name: 'plex',  vmid: 1, state: 'deployed' })
-    insert({ name: 'plex2', vmid: 2, state: 'degraded' })
-    expect(getInstances({ search: 'plex', state: 'deployed' })).toHaveLength(1)
-  })
-
-  it('returns empty array when no results match', () => {
-    insert({ name: 'plex', vmid: 1 })
-    expect(getInstances({ search: 'zzz' })).toEqual([])
-  })
-})
+// ── getInstance ───────────────────────────────────────────────────────────────
 
 describe('getInstance', () => {
   it('returns the instance with the given vmid', () => {
-    insert({ name: 'plex', vmid: 117 })
-    const inst = getInstance(117)
-    expect(inst).not.toBeNull()
-    expect(inst.name).toBe('plex')
-    expect(inst.vmid).toBe(117)
-  })
+    createInstance({ name: 'plex', state: 'deployed', stack: 'production', vmid: 117, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    const inst = getInstance(117);
+    expect(inst).not.toBeNull();
+    expect(inst.name).toBe('plex');
+    expect(inst.vmid).toBe(117);
+  });
 
-  it('returns null for an unknown vmid', () => {
-    expect(getInstance(999)).toBeNull()
-  })
-})
+  it('returns null for unknown vmid', () => {
+    expect(getInstance(999)).toBeNull();
+  });
+});
+
+// ── getDistinctStacks ─────────────────────────────────────────────────────────
 
 describe('getDistinctStacks', () => {
-  it('returns empty array when no instances exist', () => {
-    expect(getDistinctStacks()).toEqual([])
-  })
+  it('returns empty array when table is empty', () => {
+    expect(getDistinctStacks()).toEqual([]);
+  });
 
   it('returns unique stacks sorted alphabetically', () => {
-    insert({ vmid: 1, stack: 'production' })
-    insert({ vmid: 2, stack: 'development' })
-    insert({ vmid: 3, stack: 'production' })
-    expect(getDistinctStacks()).toEqual(['development', 'production'])
-  })
+    createInstance({ name: 'a', state: 'deployed', stack: 'production',  vmid: 1, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    createInstance({ name: 'b', state: 'testing',  stack: 'development', vmid: 2, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    createInstance({ name: 'c', state: 'deployed', stack: 'production',  vmid: 3, atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 });
+    expect(getDistinctStacks()).toEqual(['development', 'production']);
+  });
+});
 
-  it('excludes blank stack values', () => {
-    insert({ vmid: 1, stack: '' })
-    insert({ vmid: 2, stack: 'production' })
-    expect(getDistinctStacks()).toEqual(['production'])
-  })
-})
+// ── createInstance ────────────────────────────────────────────────────────────
 
 describe('createInstance', () => {
-  it('inserts a new instance', () => {
-    insert({ name: 'traefik', vmid: 100, stack: 'production', state: 'deployed' })
-    const inst = getInstance(100)
-    expect(inst.name).toBe('traefik')
-    expect(inst.stack).toBe('production')
-    expect(inst.state).toBe('deployed')
-  })
+  const base = { state: 'deployed', stack: 'production', atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 };
+
+  it('inserts a new instance and sets timestamps', () => {
+    createInstance({ ...base, name: 'traefik', vmid: 100 });
+    const inst = getInstance(100);
+    expect(inst.name).toBe('traefik');
+    expect(inst.created_at).not.toBeNull();
+    expect(inst.updated_at).not.toBeNull();
+  });
 
   it('stores service flags correctly', () => {
-    insert({ vmid: 1, atlas: 1, argus: 0, tailscale: 1, hardware_acceleration: 1 })
-    const inst = getInstance(1)
-    expect(inst.atlas).toBe(1)
-    expect(inst.argus).toBe(0)
-    expect(inst.tailscale).toBe(1)
-    expect(inst.hardware_acceleration).toBe(1)
-  })
+    createInstance({ ...base, name: 'plex', vmid: 1, atlas: 1, tailscale: 1, hardware_acceleration: 1 });
+    const inst = getInstance(1);
+    expect(inst.atlas).toBe(1);
+    expect(inst.argus).toBe(0);
+    expect(inst.tailscale).toBe(1);
+    expect(inst.hardware_acceleration).toBe(1);
+  });
 
   it('rejects duplicate vmid', () => {
-    insert({ vmid: 100 })
-    expect(() => insert({ name: 'other', vmid: 100 })).toThrow()
-  })
+    createInstance({ ...base, name: 'a', vmid: 100 });
+    expect(() => createInstance({ ...base, name: 'b', vmid: 100 })).toThrow();
+  });
 
-  it('sets createdAt and updatedAt on insert', () => {
-    insert({ vmid: 1 })
-    const inst = getInstance(1)
-    expect(inst.createdAt).not.toBeNull()
-    expect(inst.updatedAt).not.toBeNull()
-  })
-})
+  it('rejects invalid state', () => {
+    expect(() => createInstance({ ...base, name: 'a', vmid: 1, state: 'invalid' })).toThrow();
+  });
+
+  it('rejects invalid stack', () => {
+    expect(() => createInstance({ ...base, name: 'a', vmid: 1, stack: 'invalid' })).toThrow();
+  });
+});
+
+// ── updateInstance ────────────────────────────────────────────────────────────
 
 describe('updateInstance', () => {
-  it('updates fields on an existing instance', () => {
-    insert({ name: 'old-name', vmid: 100, state: 'testing', stack: 'development' })
-    const before = getInstance(100)
-    db.run(
-      `UPDATE instances SET name=?, state=?, stack=?, updatedAt=datetime('now') WHERE id=?`,
-      ['new-name', 'deployed', 'production', before.id]
-    )
-    const after = getInstance(100)
-    expect(after.name).toBe('new-name')
-    expect(after.state).toBe('deployed')
-    expect(after.stack).toBe('production')
-  })
+  const base = { state: 'deployed', stack: 'production', atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 };
 
-  it('updates updatedAt on write', () => {
-    insert({ vmid: 1 })
-    const before = getInstance(1)
-    db.run(`UPDATE instances SET name=?, updatedAt=datetime('now') WHERE id=?`, ['updated', before.id])
-    const after = getInstance(1)
-    expect(after.updatedAt).not.toBeNull()
-  })
-})
+  it('updates fields and refreshes updated_at', () => {
+    createInstance({ ...base, name: 'old', vmid: 100 });
+    updateInstance(100, { ...base, name: 'new', vmid: 100, state: 'degraded' });
+    const inst = getInstance(100);
+    expect(inst.name).toBe('new');
+    expect(inst.state).toBe('degraded');
+  });
+
+  it('can change vmid', () => {
+    createInstance({ ...base, name: 'a', vmid: 100 });
+    updateInstance(100, { ...base, name: 'a', vmid: 200 });
+    expect(getInstance(100)).toBeNull();
+    expect(getInstance(200)).not.toBeNull();
+  });
+});
+
+// ── deleteInstance ────────────────────────────────────────────────────────────
 
 describe('deleteInstance', () => {
+  const base = { state: 'deployed', stack: 'production', atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 };
+
   it('removes the instance', () => {
-    insert({ vmid: 1 })
-    const inst = getInstance(1)
-    db.run('DELETE FROM instances WHERE id = ?', [inst.id])
-    expect(getInstance(1)).toBeNull()
-  })
+    createInstance({ ...base, name: 'a', vmid: 1 });
+    deleteInstance(1);
+    expect(getInstance(1)).toBeNull();
+  });
 
   it('only removes the targeted instance', () => {
-    insert({ name: 'a', vmid: 1 })
-    insert({ name: 'b', vmid: 2 })
-    const inst = getInstance(1)
-    db.run('DELETE FROM instances WHERE id = ?', [inst.id])
-    expect(getInstance(1)).toBeNull()
-    expect(getInstance(2)).not.toBeNull()
-  })
-})
+    createInstance({ ...base, name: 'a', vmid: 1 });
+    createInstance({ ...base, name: 'b', vmid: 2 });
+    deleteInstance(1);
+    expect(getInstance(1)).toBeNull();
+    expect(getInstance(2)).not.toBeNull();
+  });
+
+  it('clears history for the deleted instance', () => {
+    createInstance({ ...base, name: 'a', vmid: 1 });
+    deleteInstance(1);
+    expect(getInstanceHistory(1)).toHaveLength(0);
+  });
+
+  it('does not clear history for other instances', () => {
+    createInstance({ ...base, name: 'a', vmid: 1 });
+    createInstance({ ...base, name: 'b', vmid: 2 });
+    deleteInstance(1);
+    expect(getInstanceHistory(2).length).toBeGreaterThan(0);
+  });
+});
+
+// ── importInstances ───────────────────────────────────────────────────────────
+
+describe('importInstances', () => {
+  const base = { state: 'deployed', stack: 'production', atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 };
+
+  it('replaces all existing instances with the imported set', () => {
+    createInstance({ ...base, name: 'old', vmid: 1 });
+    importInstances([{ ...base, name: 'new', vmid: 2 }]);
+    expect(getInstance(1)).toBeNull();
+    expect(getInstance(2)).not.toBeNull();
+  });
+
+  it('clears all instances when passed an empty array', () => {
+    createInstance({ ...base, name: 'a', vmid: 1 });
+    importInstances([]);
+    expect(getInstances()).toEqual([]);
+  });
+
+  it('clears history for all replaced instances', () => {
+    createInstance({ ...base, name: 'old', vmid: 1 });
+    importInstances([{ ...base, name: 'new', vmid: 2 }]);
+    expect(getInstanceHistory(1)).toHaveLength(0);
+  });
+
+  it('restores history rows when provided', () => {
+    importInstances(
+      [{ ...base, name: 'a', vmid: 1 }],
+      [{ vmid: 1, field: 'created', old_value: null, new_value: null, changed_at: '2026-01-01 00:00:00' }]
+    );
+    const h = getInstanceHistory(1);
+    expect(h.some(e => e.field === 'created')).toBe(true);
+  });
+});
+
+// ── instance history ─────────────────────────────────────────────────────────
+
+describe('instance history', () => {
+  const base = { state: 'deployed', stack: 'production', atlas: 0, argus: 0, semaphore: 0, patchmon: 0, tailscale: 0, andromeda: 0, tailscale_ip: '', hardware_acceleration: 0 };
+
+  it('logs a created event when an instance is created', () => {
+    createInstance({ ...base, name: 'a', vmid: 1 });
+    const h = getInstanceHistory(1);
+    expect(h).toHaveLength(1);
+    expect(h[0].field).toBe('created');
+  });
+
+  it('logs changed fields when an instance is updated', () => {
+    createInstance({ ...base, name: 'a', vmid: 1 });
+    updateInstance(1, { ...base, name: 'a', vmid: 1, state: 'degraded' });
+    const h = getInstanceHistory(1);
+    const stateEvt = h.find(e => e.field === 'state');
+    expect(stateEvt).toBeDefined();
+    expect(stateEvt.old_value).toBe('deployed');
+    expect(stateEvt.new_value).toBe('degraded');
+  });
+
+  it('logs no events when nothing changes on update', () => {
+    createInstance({ ...base, name: 'a', vmid: 1 });
+    updateInstance(1, { ...base, name: 'a', vmid: 1 });
+    const h = getInstanceHistory(1).filter(e => e.field !== 'created');
+    expect(h).toHaveLength(0);
+  });
+
+  it('records history under the new vmid when vmid changes', () => {
+    createInstance({ ...base, name: 'a', vmid: 1 });
+    updateInstance(1, { ...base, name: 'a', vmid: 2 });
+    expect(getInstanceHistory(2).some(e => e.field === 'vmid')).toBe(true);
+    expect(getInstanceHistory(1).filter(e => e.field !== 'created')).toHaveLength(0);
+  });
+});
+
+// ── Test environment boot isolation ───────────────────────────────────────────
+
+describe('test environment boot isolation', () => {
+  it('vitest runs with NODE_ENV=test', () => {
+    // Vitest sets NODE_ENV=test automatically. This is the guard condition
+    // that prevents the boot init() from opening the real database file.
+    expect(process.env.NODE_ENV).toBe('test');
+  });
+
+  it('db module loads cleanly in parallel workers without locking the real db file', () => {
+    // Regression: the module-level init(DEFAULT_PATH) used to run unconditionally,
+    // causing "database is locked" when multiple test workers imported db.js at
+    // the same time. process.exit(1) then killed the worker mid-suite.
+    // Fix: boot init is skipped when NODE_ENV=test. _resetForTest() handles setup.
+    // Reaching this line proves the module loaded without calling process.exit.
+    expect(() => _resetForTest()).not.toThrow();
+    expect(getInstances()).toEqual([]);
+  });
+});

tests/helpers.test.js

@@ -1,4 +1,7 @@
+// @vitest-environment jsdom
 import { describe, it, expect } from 'vitest'
+import { readFileSync } from 'fs'
+import { join } from 'path'
 
 // ── esc() ─────────────────────────────────────────────────────────────────────
 // Mirrors the implementation in ui.js exactly (DOM-based).
@@ -55,16 +58,22 @@ describe('esc', () => {
 
 // ── fmtDate() ─────────────────────────────────────────────────────────────────
 
-function fmtDate(d) {
+function parseUtc(d) {
+  if (typeof d !== 'string') return new Date(d)
+  const hasZone = d.endsWith('Z') || /[+-]\d{2}:\d{2}$/.test(d)
+  return new Date(hasZone ? d : d.replace(' ', 'T') + 'Z')
+}
+
+function fmtDate(d, tz = 'UTC') {
   if (!d) return '—'
   try {
-    return new Date(d).toLocaleDateString('en-US', { year: 'numeric', month: 'short', day: 'numeric' })
+    return parseUtc(d).toLocaleDateString('en-US', { year: 'numeric', month: 'short', day: 'numeric', timeZone: tz })
   } catch (e) { return d }
 }
 
 describe('fmtDate', () => {
   it('formats a valid ISO date string', () => {
-    const result = fmtDate('2024-03-15T00:00:00')
+    const result = fmtDate('2024-03-15T12:00:00Z')
     expect(result).toMatch(/Mar/)
     expect(result).toMatch(/15/)
     expect(result).toMatch(/2024/)
@@ -85,24 +94,42 @@ describe('fmtDate', () => {
 
 // ── fmtDateFull() ─────────────────────────────────────────────────────────────
 
-function fmtDateFull(d) {
+function fmtDateFull(d, tz = 'UTC') {
   if (!d) return '—'
   try {
-    return new Date(d).toLocaleString('en-US', {
+    return parseUtc(d).toLocaleString('en-US', {
       year: 'numeric', month: 'short', day: 'numeric',
       hour: '2-digit', minute: '2-digit',
+      timeZone: tz, timeZoneName: 'short',
     })
   } catch (e) { return d }
 }
 
 describe('fmtDateFull', () => {
   it('includes date and time components', () => {
-    const result = fmtDateFull('2024-03-15T14:30:00')
+    const result = fmtDateFull('2024-03-15T14:30:00Z')
     expect(result).toMatch(/Mar/)
     expect(result).toMatch(/2024/)
     expect(result).toMatch(/\d{1,2}:\d{2}/)
   })
 
+  it('includes the timezone abbreviation', () => {
+    expect(fmtDateFull('2024-03-15T14:30:00Z', 'UTC')).toMatch(/UTC/)
+  })
+
+  it('converts to the given timezone', () => {
+    // 2024-03-15 18:30 UTC = 2024-03-15 14:30 EDT (UTC-4 in March)
+    const result = fmtDateFull('2024-03-15T18:30:00Z', 'America/New_York')
+    expect(result).toMatch(/2:30/)
+    expect(result).toMatch(/EDT/)
+  })
+
+  it('treats SQLite-format timestamps (space, no Z) as UTC', () => {
+    // SQLite datetime('now') → 'YYYY-MM-DD HH:MM:SS', no timezone marker.
+    // Must parse identically to the same moment expressed as ISO UTC.
+    expect(fmtDateFull('2024-03-15 18:30:00', 'UTC')).toBe(fmtDateFull('2024-03-15T18:30:00Z', 'UTC'))
+  })
+
   it('returns — for null', () => {
     expect(fmtDateFull(null)).toBe('—')
   })
@@ -111,3 +138,111 @@ describe('fmtDateFull', () => {
     expect(fmtDateFull('')).toBe('—')
   })
 })
+
+// ── versionLabel() ───────────────────────────────────────────────────────────
+// Mirrors the logic in app.js — semver strings get a v prefix, dev strings don't.
+
+function versionLabel(v) {
+  return /^\d/.test(v) ? `v${v}` : v
+}
+
+describe('version label formatting', () => {
+  it('prepends v for semver strings', () => {
+    expect(versionLabel('1.1.2')).toBe('v1.1.2')
+    expect(versionLabel('2.0.0')).toBe('v2.0.0')
+  })
+
+  it('does not prepend v for dev build strings', () => {
+    expect(versionLabel('dev-abc1234')).toBe('dev-abc1234')
+  })
+})
+
+// ── fmtHistVal() ─────────────────────────────────────────────────────────────
+// Mirrors the logic in ui.js — formats history field values for display.
+
+const BOOL_FIELDS = ['atlas','argus','semaphore','patchmon','tailscale','andromeda','hardware_acceleration']
+
+function fmtHistVal(field, val) {
+  if (val == null || val === '') return '—'
+  if (BOOL_FIELDS.includes(field)) return val === '1' ? 'on' : 'off'
+  return val
+}
+
+describe('fmtHistVal', () => {
+  it('returns — for null', () => {
+    expect(fmtHistVal('state', null)).toBe('—')
+  })
+
+  it('returns — for empty string', () => {
+    expect(fmtHistVal('state', '')).toBe('—')
+  })
+
+  it('returns on/off for boolean service fields', () => {
+    expect(fmtHistVal('atlas', '1')).toBe('on')
+    expect(fmtHistVal('atlas', '0')).toBe('off')
+    expect(fmtHistVal('hardware_acceleration', '1')).toBe('on')
+  })
+
+  it('returns the value as-is for non-boolean fields', () => {
+    expect(fmtHistVal('state', 'deployed')).toBe('deployed')
+    expect(fmtHistVal('name', 'plex')).toBe('plex')
+    expect(fmtHistVal('tailscale_ip', '100.64.0.1')).toBe('100.64.0.1')
+  })
+})
+
+// ── stateClass() ─────────────────────────────────────────────────────────────
+// Mirrors the logic in ui.js — maps state values to timeline CSS classes.
+
+function stateClass(field, val) {
+  if (field !== 'state') return ''
+  return { deployed: 'tl-deployed', testing: 'tl-testing', degraded: 'tl-degraded' }[val] ?? ''
+}
+
+describe('stateClass', () => {
+  it('returns empty string for non-state fields', () => {
+    expect(stateClass('name', 'plex')).toBe('')
+    expect(stateClass('stack', 'production')).toBe('')
+  })
+
+  it('returns the correct colour class for each state value', () => {
+    expect(stateClass('state', 'deployed')).toBe('tl-deployed')
+    expect(stateClass('state', 'testing')).toBe('tl-testing')
+    expect(stateClass('state', 'degraded')).toBe('tl-degraded')
+  })
+
+  it('returns empty string for unknown state values', () => {
+    expect(stateClass('state', 'unknown')).toBe('')
+  })
+})
+
+// ── CSS regressions ───────────────────────────────────────────────────────────
+
+const css = readFileSync(join(__dirname, '../css/app.css'), 'utf8')
+
+describe('CSS regressions', () => {
+  it('.badge has text-align: center so state labels are not left-skewed on cards', () => {
+    // Regression: badges rendered left-aligned inside the card's flex-end column.
+    // Without text-align: center, short labels (e.g. "deployed") appear
+    // left-justified inside their pill rather than centred.
+    expect(css).toMatch(/\.badge\s*\{[^}]*text-align\s*:\s*center/s)
+  })
+})
+
+// ── CI workflow regressions ───────────────────────────────────────────────────
+
+const ciYml = readFileSync(join(__dirname, '../.gitea/workflows/ci.yml'), 'utf8')
+
+describe('CI workflow regressions', () => {
+  it('build-dev job passes BUILD_VERSION build arg', () => {
+    // Regression: dev image showed semver instead of dev-<sha> because
+    // BUILD_VERSION was never passed to docker build.
+    expect(ciYml).toContain('BUILD_VERSION')
+  })
+
+  it('short SHA is computed with git rev-parse, not $GITEA_SHA (which is empty)', () => {
+    // Regression: ${GITEA_SHA::7} expands to "" on Gitea runners — nav showed "dev-".
+    // git rev-parse --short HEAD works regardless of which env vars the runner sets.
+    expect(ciYml).toContain('git rev-parse --short HEAD')
+    expect(ciYml).not.toContain('GITEA_SHA')
+  })
+})

vitest.config.js

@@ -2,6 +2,6 @@ import { defineConfig } from 'vitest/config'
 
 export default defineConfig({
   test: {
-    environment: 'jsdom',
+    environment: 'node',
   },
 })