Split audits into Weigh Ins (bulk) and Bin Checks (discrete)

Replaces the unified audit system with two purpose-built flows:
- Weigh Ins: rebranded audit flow for bulk products (Flower, Concentrate,
  Tincture) with scale weigh, container weigh, and estimate modes
- Bin Checks: new bin-level presence check — select a bin, scan every item,
  resolve discrepancies (wrong bin, unknown, missing), auto-records presence
  audits on verified items

Adds cadence_days and last_checked to bins table, with per-bin overdue
tracking on the dashboard and bins view.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/db.ts

@@ -16,6 +16,7 @@ archiveV1IfPresent();
 migrateAddCheckoutDate();
 migrateAddContainerWeight();
 migrateAddPrevBinId();
+migrateAddBinCheckFields();
 
 const schema = readFileSync(join(__dirname, "schema.sql"), "utf8");
 db.exec(schema);
@@ -44,6 +45,15 @@ function migrateAddPrevBinId(): void {
   db.exec(`ALTER TABLE inventory_items ADD COLUMN prev_bin_id TEXT REFERENCES bins(id)`);
 }
 
+function migrateAddBinCheckFields(): void {
+  const cols = db
+    .prepare(`PRAGMA table_info(bins)`)
+    .all() as { name: string }[];
+  if (cols.length === 0 || cols.some((c) => c.name === "cadence_days")) return;
+  db.exec(`ALTER TABLE bins ADD COLUMN cadence_days INTEGER NOT NULL DEFAULT 30`);
+  db.exec(`ALTER TABLE bins ADD COLUMN last_checked TEXT`);
+}
+
 // One-shot migration: the original schema put per-instance fields (weight,
 // bin_id, etc.) directly on `products`. The split schema separates products
 // (catalog) from inventory_items (instance). When we detect the old shape,

server/src/routes/bootstrap.ts

@@ -70,7 +70,14 @@ bootstrapRouter.get("/bootstrap", (_req, res) => {
     .all();
   const shops = db.prepare("SELECT * FROM shops ORDER BY id").all();
   const brands = db.prepare("SELECT * FROM brands ORDER BY id").all();
-  const bins = db.prepare("SELECT id, name, capacity FROM bins ORDER BY id").all();
+  const binsRaw = db.prepare("SELECT id, name, capacity, cadence_days, last_checked FROM bins ORDER BY id").all() as { id: string; name: string; capacity: number; cadence_days: number; last_checked: string | null }[];
+  const bins = binsRaw.map((b) => ({
+    id: b.id,
+    name: b.name,
+    capacity: b.capacity,
+    cadenceDays: b.cadence_days,
+    lastChecked: b.last_checked,
+  }));
   const strains = db
     .prepare<[], StrainRow>("SELECT * FROM strains ORDER BY name COLLATE NOCASE")
     .all();

server/src/routes/catalog.ts

@@ -103,20 +103,21 @@ catalogRouter.delete("/shops/:id", (req, res) => {
 });
 
 catalogRouter.post("/bins", (req, res) => {
-  const { name, capacity } = req.body as { name: string; capacity?: number };
+  const { name, capacity, cadenceDays } = req.body as { name: string; capacity?: number; cadenceDays?: number };
   if (!name?.trim()) return res.status(400).json({ error: "name required" });
   const id = nextId("bin", "bins");
   const cap = Number.isFinite(capacity) && (capacity as number) > 0 ? Math.floor(capacity as number) : 10;
-  db.prepare("INSERT INTO bins (id, name, capacity) VALUES (?, ?, ?)").run(id, name.trim(), cap);
-  res.json({ id, name: name.trim(), capacity: cap });
+  const cad = Number.isFinite(cadenceDays) && (cadenceDays as number) > 0 ? Math.floor(cadenceDays as number) : 30;
+  db.prepare("INSERT INTO bins (id, name, capacity, cadence_days) VALUES (?, ?, ?, ?)").run(id, name.trim(), cap, cad);
+  res.json({ id, name: name.trim(), capacity: cap, cadenceDays: cad, lastChecked: null });
 });
 
 catalogRouter.patch("/bins/:id", (req, res) => {
   const { id } = req.params;
-  const { name, capacity } = req.body as { name?: string; capacity?: number };
+  const { name, capacity, cadenceDays } = req.body as { name?: string; capacity?: number; cadenceDays?: number };
   const existing = db
-    .prepare<[string], { id: string; name: string; capacity: number }>(
-      "SELECT id, name, capacity FROM bins WHERE id = ?",
+    .prepare<[string], { id: string; name: string; capacity: number; cadence_days: number; last_checked: string | null }>(
+      "SELECT id, name, capacity, cadence_days, last_checked FROM bins WHERE id = ?",
     )
     .get(id);
   if (!existing) return res.status(404).json({ error: "bin not found" });
@@ -126,9 +127,13 @@ catalogRouter.patch("/bins/:id", (req, res) => {
     Number.isFinite(capacity) && (capacity as number) > 0
       ? Math.floor(capacity as number)
       : existing.capacity;
+  const nextCadence =
+    Number.isFinite(cadenceDays) && (cadenceDays as number) > 0
+      ? Math.floor(cadenceDays as number)
+      : existing.cadence_days;
 
-  db.prepare("UPDATE bins SET name = ?, capacity = ? WHERE id = ?").run(nextName, nextCapacity, id);
-  res.json({ id, name: nextName, capacity: nextCapacity });
+  db.prepare("UPDATE bins SET name = ?, capacity = ?, cadence_days = ? WHERE id = ?").run(nextName, nextCapacity, nextCadence, id);
+  res.json({ id, name: nextName, capacity: nextCapacity, cadenceDays: nextCadence, lastChecked: existing.last_checked });
 });
 
 // Deleting a bin unassigns any inventory items that reference it (bin_id → NULL),

server/src/routes/inventory.ts

@@ -435,6 +435,62 @@ inventoryRouter.post("/inventory/:id/audit", (req, res) => {
   res.json({ ok: true });
 });
 
+// ─── Bin check endpoint ──────────────────────────────────────────
+
+inventoryRouter.post("/bins/:id/check", (req, res) => {
+  const { id } = req.params;
+  const { date, verifiedItemIds, goneItemIds } = req.body as {
+    date: string;
+    verifiedItemIds: string[];
+    goneItemIds: string[];
+  };
+
+  const bin = db
+    .prepare<[string], { id: string }>("SELECT id FROM bins WHERE id = ?")
+    .get(id);
+  if (!bin) return res.status(404).json({ error: "bin not found" });
+
+  const tx = db.transaction(() => {
+    for (const itemId of verifiedItemIds) {
+      const item = db
+        .prepare<
+          [string],
+          { product_id: string; count_original: number; count_last_audit: number | null }
+        >(
+          `SELECT product_id, count_original, count_last_audit FROM inventory_items WHERE id = ?`,
+        )
+        .get(itemId);
+      if (!item) continue;
+
+      const prev = item.count_last_audit ?? item.count_original;
+      db.prepare(
+        `INSERT INTO audits (inventory_id, date, mode, value, prev_value, confirmed_by)
+         VALUES (?, ?, 'presence', ?, ?, 'bin-check')`,
+      ).run(itemId, date, prev, prev);
+      db.prepare(
+        `UPDATE inventory_items SET count_last_audit = ? WHERE id = ?`,
+      ).run(prev, itemId);
+    }
+
+    for (const itemId of goneItemIds) {
+      try {
+        doGone(itemId, date, "missing from bin check");
+      } catch {
+        // item may already be gone
+      }
+    }
+
+    db.prepare("UPDATE bins SET last_checked = ? WHERE id = ?").run(date, id);
+  });
+
+  try {
+    tx();
+    res.json({ ok: true, verified: verifiedItemIds.length, gone: goneItemIds.length });
+  } catch (e: any) {
+    res.status(400).json({ error: e.message });
+  }
+});
+
 // ─── Batch endpoint ───────────────────────────────────────────────
 
 type BatchOp =

server/src/schema.sql

@@ -15,7 +15,9 @@ CREATE TABLE IF NOT EXISTS bins (
   id TEXT PRIMARY KEY,
   name TEXT NOT NULL,
   location TEXT,
-  capacity INTEGER NOT NULL DEFAULT 10
+  capacity INTEGER NOT NULL DEFAULT 10,
+  cadence_days INTEGER NOT NULL DEFAULT 30,
+  last_checked TEXT
 );
 
 -- Strains: one row per cannabis strain (catalog-level). UNIQUE on name only,