feat(game): tasks table + schema v7 backfill, admin registry (#44)

lib/game/save.ts

@@ -97,7 +97,7 @@ async function seedStartingCrew(db: GameDb, saveId: number, seed: string): Promi
 // What each schema version added to a save. Saves created by older code lack the data newer
 // versions seed at new-game time, so ensureSave runs these steps in order for anything below
 // current — each step is idempotent (a no-op when its data already exists).
-export const SCHEMA_VERSION = 6 // v1: save + start region only · v2: bodies for every system · v3: starting crew · v4: starting ship · v5: tech tree · v6: mission board
+export const SCHEMA_VERSION = 7 // v1: save + start region only · v2: bodies for every system · v3: starting crew · v4: starting ship · v5: tech tree · v6: mission board · v7: tasks table
 
 // Seeds the starting ship: one row per known type — core types built at base values, the rest
 // unbuilt (level/capacity 0) until a BUILD action.
@@ -173,6 +173,11 @@ async function backfillSave(db: GameDb, save: { id: number; seed: string; schema
     await topUpMissionBoard(db) // idempotent — only inserts when fewer than MIN_AVAILABLE AVAILABLE contracts exist
     version = 6
   }
+  if (version < 7) {
+    // The tasks table itself is created by the DDL at open (CREATE TABLE IF NOT EXISTS) for
+    // every file — new or old — so an upgraded save simply starts with an empty queue; stamp.
+    version = 7
+  }
 
   if (from !== SCHEMA_VERSION) {
     await db.db.update(schema.saves).set({ schemaVersion: version }).where(eq(schema.saves.id, save.id))