feat(phase5): stream editor, i18n, settings, key management

- StreamEditor: view/add/trim/delete entries with field management
- KeyDetail: TTL editor dialog, rename dialog, copy key name button
- i18n: English + Chinese locale system with composable
- SettingsView: theme selector, language switch, scan count, font size
- MainArea: added Settings tab
- RedisService: stream/rename/exists operations
- Preload: stream/rename/exists IPC channels

src/main/ipc-handlers.ts

@@ -182,4 +182,29 @@ export function registerIpcHandlers(): void {
   ipcMain.handle('redis:batchDelete', async (_e, id: string, keys: string[]) => {
     return redisService.batchDelete(id, keys)
   })
+
+  // Stream
+  ipcMain.handle('redis:streamInfo', async (_e, id: string, key: string) => {
+    return redisService.streamInfo(id, key)
+  })
+  ipcMain.handle('redis:streamRange', async (_e, id: string, key: string, start: string, end: string, count: number) => {
+    return redisService.streamRange(id, key, start, end, count)
+  })
+  ipcMain.handle('redis:streamAdd', async (_e, id: string, key: string, streamId: string, fieldValues: string[]) => {
+    return redisService.streamAdd(id, key, streamId, fieldValues)
+  })
+  ipcMain.handle('redis:streamTrim', async (_e, id: string, key: string, maxLen: number) => {
+    return redisService.streamTrim(id, key, maxLen)
+  })
+  ipcMain.handle('redis:streamDel', async (_e, id: string, key: string, ids: string[]) => {
+    return redisService.streamDel(id, key, ...ids)
+  })
+
+  // Key ops
+  ipcMain.handle('redis:renameKey', async (_e, id: string, oldKey: string, newKey: string) => {
+    await redisService.renameKey(id, oldKey, newKey)
+  })
+  ipcMain.handle('redis:existsKey', async (_e, id: string, key: string) => {
+    return redisService.existsKey(id, key)
+  })
 }