feat: v2 — queue matchmaking, procedural audio, sprite archetypes, auth

- Add queue-based matchmaking with Elo-proximity and 10s timeout
- Procedural sound engine (SFX, voice announcer, 4-track music)
- Sprite system refactored into 6 archetypes (standard, lobster, sheep, cyborg, blob, tank)
- 42+ fight choreographies with themed/generic/wild card selection
- 4 KO finish styles, super-speed mode, hyperdetail close-ups
- Auth routes, JoinBout page, bot profile with stats
- 7-tier ranking system (Baby through Legend)
- Arena and challenge system expansions

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

server/src/db/migrate.ts

@@ -17,8 +17,10 @@ sqlite.exec(`
     name TEXT NOT NULL UNIQUE,
     webhook_url TEXT NOT NULL,
     avatar_seed TEXT NOT NULL,
+    archetype TEXT NOT NULL DEFAULT 'standard',
     secret_hash TEXT NOT NULL,
     public_key TEXT,
+    profile_pic_url TEXT,
     elo_rating REAL NOT NULL DEFAULT 1200,
     wins INTEGER NOT NULL DEFAULT 0,
     losses INTEGER NOT NULL DEFAULT 0,
@@ -63,5 +65,15 @@ sqlite.exec(`
   );
 `)
 
+// Migrations for existing databases
+const migrations = [
+  `ALTER TABLE bots ADD COLUMN archetype TEXT NOT NULL DEFAULT 'standard'`,
+  `ALTER TABLE bots ADD COLUMN profile_pic_url TEXT`,
+]
+
+for (const sql of migrations) {
+  try { sqlite.exec(sql) } catch { /* column already exists */ }
+}
+
 console.log('[botfights] database migrated')
 sqlite.close()