v3: added site-wide categories, added admin category management, various visual fixes

api/db/migrations/0006_categories.ts

@@ -0,0 +1,39 @@
+import type { DatabaseSync } from "node:sqlite";
+
+// Idempotent: safe to run against a fresh db (already created from schema.sql
+// with the categories tables) or an existing one that predates them.
+export function up(db: DatabaseSync): void {
+  const tables = new Set(
+    (db.prepare(
+      `SELECT name FROM sqlite_master WHERE type = 'table';`,
+    ).all() as { name: string }[]).map((r) => r.name),
+  );
+
+  if (!tables.has("categories")) {
+    db.exec(
+      `CREATE TABLE categories (
+        id         TEXT PRIMARY KEY,
+        slug       TEXT NOT NULL UNIQUE,
+        name       TEXT NOT NULL UNIQUE,
+        position   INTEGER NOT NULL DEFAULT 0,
+        created_at TEXT NOT NULL,
+        updated_at TEXT
+      );`,
+    );
+  }
+
+  if (!tables.has("dump_categories")) {
+    db.exec(
+      `CREATE TABLE dump_categories (
+        dump_id     TEXT NOT NULL,
+        category_id TEXT NOT NULL,
+        PRIMARY KEY (dump_id, category_id),
+        FOREIGN KEY (dump_id)     REFERENCES dumps(id)      ON DELETE CASCADE,
+        FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE CASCADE
+      );`,
+    );
+    db.exec(
+      `CREATE INDEX idx_dump_categories_category ON dump_categories(category_id);`,
+    );
+  }
+}