Improve logging and simplify fzf implementation

- Refactor fzf search to use Bun's $ syntax for cleaner command execution
- Add request/response duration logging to server middleware
- Set default service name for logging to improve log clarity

🤖 Generated with [OpenCode](https://opencode.ai)

Co-Authored-By: OpenCode <noreply@opencode.ai>

packages/opencode/src/util/log.ts

@@ -2,7 +2,7 @@ import path from "path"
 import fs from "fs/promises"
 import { Global } from "../global"
 export namespace Log {
-  export const Default = create()
+  export const Default = create({ service: "default" })
 
   export interface Options {
     print: boolean