perf: Vite 构建启用 code splitting，Bun RSS 从 966MB 降至 35MB

Bun/JSC 全量解析单文件大 JS 的 bytecode 和 JIT，17MB 产物导致
RSS 暴涨至 ~1GB（Node/V8 懒解析仅需 ~220MB）。启用代码分割后
Bun 按需加载 chunk，--version RSS 35MB，完整加载 ~500MB。

改动：
- vite.config.ts: 移除 codeSplitting:false，添加 chunkFileNames
- post-build.ts: 遍历 dist/ + dist/chunks/ 所有文件做 Bun patch
- 新建 distRoot.ts 共享工具函数，统一路径定位逻辑
- ripgrep.ts/computerUse/setup.ts/claudeInChrome/setup.ts/updateCCB.ts:
  用 distRoot 替换内联 import.meta.url 路径推算

scripts/post-build.ts

@@ -9,28 +9,52 @@
 import { readdir, readFile, writeFile, cp } from 'node:fs/promises'
 import { chmodSync } from 'node:fs'
 import { join } from 'node:path'
-import { execSync } from 'node:child_process'
 
 const outdir = 'dist'
 
 async function postBuild() {
-  // Step 1: Patch globalThis.Bun destructuring in the single bundled file
-  const cliPath = join(outdir, 'cli.js')
+  // Step 1: Patch globalThis.Bun destructuring in ALL output files
   const BUN_DESTRUCTURE = /var \{([^}]+)\} = globalThis\.Bun;?/g
   const BUN_DESTRUCTURE_SAFE =
     'var {$1} = typeof globalThis.Bun !== "undefined" ? globalThis.Bun : {};'
 
   let bunPatched = 0
-  {
-    const content = await readFile(cliPath, 'utf-8')
+  const files = await readdir(outdir)
+  const jsFiles = files.filter(f => f.endsWith('.js'))
+
+  for (const file of jsFiles) {
+    const filePath = join(outdir, file)
+    const content = await readFile(filePath, 'utf-8')
+    BUN_DESTRUCTURE.lastIndex = 0
     if (BUN_DESTRUCTURE.test(content)) {
       await writeFile(
-        cliPath,
+        filePath,
         content.replace(BUN_DESTRUCTURE, BUN_DESTRUCTURE_SAFE),
       )
       bunPatched++
     }
+  }
+
+  // Also patch chunk files in dist/chunks/
+  const chunksDir = join(outdir, 'chunks')
+  let chunkFiles: string[] = []
+  try {
+    chunkFiles = (await readdir(chunksDir)).filter(f => f.endsWith('.js'))
+  } catch {
+    // No chunks directory — single-file build fallback
+  }
+
+  for (const file of chunkFiles) {
+    const filePath = join(chunksDir, file)
+    const content = await readFile(filePath, 'utf-8')
     BUN_DESTRUCTURE.lastIndex = 0
+    if (BUN_DESTRUCTURE.test(content)) {
+      await writeFile(
+        filePath,
+        content.replace(BUN_DESTRUCTURE, BUN_DESTRUCTURE_SAFE),
+      )
+      bunPatched++
+    }
   }
 
   // Step 2: Copy native addon files
@@ -55,7 +79,7 @@ async function postBuild() {
   chmodSync(cliNode, 0o755)
 
   console.log(
-    `Post-build complete: patched ${bunPatched} Bun destructure, generated entry points`,
+    `Post-build complete: patched ${bunPatched} Bun destructure across ${jsFiles.length + chunkFiles.length} files, generated entry points`,
   )
 }