Initial commit — SvelteKit fleet manager for T5 Plutonium servers

Ports push_scripts.sh (1497 lines of bash) to a SvelteKit + SQLite web app
that manages a fleet of T5 Plutonium servers running on Komodo. Same push
and beta workflow as the shell script, with a live SSE pipeline view, a
!rt-token-gated auth modal that hard-pauses deployments on stale tokens,
per-file audit diffs, and a Komodo-container deployment target.

- Push/beta engines port the exact filter, held-by-beta, conflict, and
  stale-backup rules from the shell script
- SQLite (better-sqlite3) replaces script_metadata.json; a one-shot
  importer moves legacy state over on first boot
- 16 vitest tests cover push add/update/skip, beta open→rollback,
  open→promote, conflict guards, sweep frozen/manual branches, and IW4M
  login/status parsing
- docker/ + komodo/stack.toml deploy as a managed container on the same
  host as the game servers, /root/zombies bind-mounted at the same path
  the shell script used

src/lib/ui/components/DiffViewer.svelte

@@ -0,0 +1,95 @@
+<script lang="ts">
+    interface Props {
+        before: string | null;
+        after: string | null;
+        verb: string;
+        relPath: string;
+    }
+    let { before, after, verb, relPath }: Props = $props();
+
+    // A tiny line-by-line diff. Not LCS — just presence-based. For GSC scripts
+    // this reads fine; if we want proper Myers diff later, swap in `diff` npm
+    // package and render the same rows.
+    interface Row {
+        kind: 'ctx' | 'add' | 'del';
+        text: string;
+    }
+
+    let rows = $derived(computeRows(before, after));
+
+    function computeRows(a: string | null, b: string | null): Row[] {
+        const alines = (a ?? '').split(/\r?\n/);
+        const blines = (b ?? '').split(/\r?\n/);
+        const asetBase: Row[] = alines.map((t) => ({ kind: 'del' as const, text: t }));
+        const bsetBase: Row[] = blines.map((t) => ({ kind: 'add' as const, text: t }));
+        if (a === null) return bsetBase;
+        if (b === null) return asetBase;
+        // interleave shared-prefix / shared-suffix trimming for readability
+        let i = 0;
+        while (i < alines.length && i < blines.length && alines[i] === blines[i]) i++;
+        let j = 0;
+        while (
+            j < alines.length - i &&
+            j < blines.length - i &&
+            alines[alines.length - 1 - j] === blines[blines.length - 1 - j]
+        )
+            j++;
+        const prefix = alines.slice(0, i).map((t) => ({ kind: 'ctx' as const, text: t }));
+        const suffix = alines.slice(alines.length - j).map((t) => ({ kind: 'ctx' as const, text: t }));
+        const midA = alines.slice(i, alines.length - j).map((t) => ({ kind: 'del' as const, text: t }));
+        const midB = blines.slice(i, blines.length - j).map((t) => ({ kind: 'add' as const, text: t }));
+        return [...prefix, ...midA, ...midB, ...suffix];
+    }
+</script>
+
+<div class="diff">
+    <header>
+        <span class="verb verb-{verb}">{verb}</span>
+        <span class="path">{relPath}</span>
+    </header>
+    <pre>
+{#each rows as r, idx (idx)}<span
+                class="ln ln-{r.kind}">{r.kind === 'add' ? '+' : r.kind === 'del' ? '-' : ' '} {r.text}
+</span>{/each}</pre>
+</div>
+
+<style>
+    .diff {
+        background: #0f0f0f;
+        border: 1px solid #333;
+        border-radius: 4px;
+        margin: 8px 0;
+        overflow: hidden;
+    }
+    header {
+        display: flex;
+        gap: 8px;
+        padding: 6px 10px;
+        background: #1a1a1a;
+        border-bottom: 1px solid #333;
+        font-size: 12px;
+    }
+    .verb {
+        padding: 1px 6px;
+        border-radius: 3px;
+        font-family: ui-monospace, monospace;
+    }
+    .verb-added { background: #2d4a2d; color: #a8e6a8; }
+    .verb-updated { background: #2d3a4a; color: #a8c8e6; }
+    .verb-removed { background: #4a2d2d; color: #ff8080; }
+    .verb-held { background: #3a2f00; color: #ffcc55; }
+    .path { color: #ccc; font-family: ui-monospace, monospace; }
+    pre {
+        margin: 0;
+        padding: 8px 10px;
+        font-family: ui-monospace, monospace;
+        font-size: 12px;
+        line-height: 1.5;
+        color: #ccc;
+        max-height: 500px;
+        overflow: auto;
+    }
+    .ln { display: block; }
+    .ln-add { background: rgba(45, 74, 45, 0.4); color: #a8e6a8; }
+    .ln-del { background: rgba(74, 45, 45, 0.4); color: #ff8080; }
+</style>