Fix Fresh 2.x deployment for Deno Deploy

- Update dev.ts to use standard Fresh Builder pattern:
- Use builder.listen(() => import('./main.ts')) callback
- Use builder.build() without app argument
- Add 'start' task for production: deno serve -A _fresh/server.js
- Add exclude pattern for _fresh directory in lint/format
- Update dev task with watch directories

deno.json

···
     "unstable-worker-options": true,
     "unstable-sloppy-imports": true
   },
+  "exclude": [
+    "**/_fresh/*"
+  ],
   "tasks": {
-    "dev": "deno run -A dev.ts",
+    "dev": "deno run -A --watch=static/,routes/,lib/,frontend/,shared/ dev.ts",
     "build": "deno run -A dev.ts build",
+    "start": "deno serve -A _fresh/server.js",
     "preview": "deno run -A main.ts",
     "quality": "deno fmt --check && deno lint",
     "check": "deno check --allow-import main.ts",

dev.ts

···
-#!/usr/bin/env -S deno run -A --watch=main.ts,lib/,frontend/,shared/
+#!/usr/bin/env -S deno run -A --watch=static/,routes/,lib/,frontend/,shared/
 /**
  * Development server for kipclip.
  * Uses Fresh with hot reload for development.
  */
 
-import { Builder } from "jsr:@fresh/core@^2.2.0/dev";
-import { app } from "./main.ts";
+import { Builder } from "fresh/dev";
 
 const builder = new Builder();
 
 if (Deno.args.includes("build")) {
   // Production build
-  await builder.build(app);
+  await builder.build();
 } else {
   // Development mode with hot reload
-  builder.listen(app);
+  await builder.listen(() => import("./main.ts"));
 }