fix: 同步引擎主键感知（setting 表字符串主键导致的 Invalid key）

intern-log/src/sync/engine.ts

@@ -38,6 +38,11 @@ async function getTable(name: string): Promise<AnyRow[]> {
   return db.table(name).toArray()
 }
 
+// 主键访问：setting 表主键为字符串 key，其余表为自增 id
+function pkOf(t: string, row: AnyRow): any {
+  return t === 'setting' ? row.key : row.id
+}
+
 // 一次性补齐 uuid 与 updated_at，缺失时回填
 async function ensureSyncFields(): Promise<void> {
   for (const t of TABLES) {
@@ -48,7 +53,7 @@ async function ensureSyncFields(): Promise<void> {
       const patch: AnyRow = {}
       if (!row.uuid) patch.uuid = newUuid()
       if (!row.updated_at) patch.updated_at = row.created_at || nowLocalISO()
-      if (Object.keys(patch).length) await table.update(row.id, patch)
+      if (Object.keys(patch).length) await table.update(pkOf(t, row), patch)
     }
   }
 }
@@ -299,7 +304,7 @@ async function doRunSync(config: SyncConfig): Promise<SyncResult> {
 
     for (const [u, row] of byUuid) {
       if (dead.has(u)) {
-        await table.delete(row.id)
+        await table.delete(pkOf(t, row))
         removed++
       }
     }
@@ -313,7 +318,10 @@ async function doRunSync(config: SyncConfig): Promise<SyncResult> {
         const localUa = String(local.updated_at || '')
         const serverUa = String(srow.updated_at || '')
         if (serverUa > localUa) {
-          await table.update(local.id, { ...srow })
+          const patch: AnyRow = { ...srow }
+          // setting 表主键为 key，禁止通过 update 修改主键字段
+          if (t === 'setting') delete patch.key
+          await table.update(pkOf(t, local), patch)
           pulled++
         }
       }