feat(db): backfill slugs for existing non-Steam games

lib/db/migrations/backfill-slugs.ts

@@ -0,0 +1,50 @@
+import { db } from "@/lib/db/index"
+import { games } from "@/lib/db/schema"
+import { generateSlug } from "@/lib/utils/slug"
+import { ne, isNull, isNotNull, and, eq } from "drizzle-orm"
+
+async function backfillSlugs() {
+  const nonSteamGames = await db
+    .select({ id: games.id, title: games.title })
+    .from(games)
+    .where(and(ne(games.source, "steam"), isNull(games.slug)))
+
+  console.log(`Found ${nonSteamGames.length} non-Steam games without slugs`)
+
+  const usedSlugs = new Set<string>()
+  const existing = await db
+    .select({ slug: games.slug })
+    .from(games)
+    .where(isNotNull(games.slug))
+  for (const row of existing) {
+    if (row.slug) usedSlugs.add(row.slug)
+  }
+
+  let updated = 0
+  let errors = 0
+  for (const game of nonSteamGames) {
+    let slug = generateSlug(game.title)
+    if (!slug) {
+      slug = `game-${game.id.slice(0, 8)}`
+    }
+    let candidate = slug
+    let suffix = 2
+    while (usedSlugs.has(candidate)) {
+      candidate = `${slug}-${suffix}`
+      suffix++
+    }
+    usedSlugs.add(candidate)
+    try {
+      await db.update(games).set({ slug: candidate }).where(eq(games.id, game.id))
+      updated++
+    } catch (err) {
+      console.error(`Failed to update ${game.title} (${game.id}):`, err)
+      errors++
+    }
+  }
+  console.log(`Backfill complete: ${updated} updated, ${errors} errors`)
+}
+
+backfillSlugs()
+  .then(() => process.exit(0))
+  .catch((err) => { console.error("Backfill failed:", err); process.exit(1) })