Feat/integrate lint preview (#285)

* feat: 适配 zed acp 协议

* docs: 完善 acp 文档

* feat: integrate feature branches + daemon/job 命令层级化 + 跨平台后台引擎

Cherry-picked from origin/lint/preview (637c908), excluding lint-only changes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: correct detectMimeFromBase64 to decode raw bytes from base64

Cherry-picked from origin/lint/preview (ee36954).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: daemon 子进程 spawn 跨平台修复 + CliLaunchSpec 集中化重构

Cherry-picked from origin/lint/preview (c5f52cd), excluding lint-only formatting changes.

- 新建 src/utils/cliLaunch.ts: 集中化 CLI 子进程启动层
- 修复 --daemon-worker=kind 等号格式解析
- 修复 daemon/bg fast path 缺少 setShellIfWindows()
- 修复 checkPathExists 用 existsSync 替代 execSync('dir')
- 7 个 spawn 站点迁移到 CliLaunchSpec

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: merge tsconfig.base.json into tsconfig.json with full compiler options

The cherry-pick from 637c908 dropped jsx/strict/etc settings when removing
tsconfig.base.json. This commit restores them in a single tsconfig.json.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: merge tsconfig.base.json into tsconfig.json with full compiler options

The cherry-pick from 637c908 dropped jsx/strict/etc settings when removing
tsconfig.base.json. This commit restores them in a single tsconfig.json.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/assistant/gate.ts

@@ -5,21 +5,20 @@ import { getFeatureValue_CACHED_MAY_BE_STALE } from '../services/analytics/growt
 /**
  * Runtime gate for KAIROS features.
  *
- * Build-time: feature('KAIROS') must be on (checked by caller before
- * this module is required).
+ * Two-layer gate:
+ *   1. Build-time: feature('KAIROS') must be on
+ *   2. Runtime: tengu_kairos_assistant GrowthBook flag (remote kill switch)
  *
- * Runtime: tengu_kairos_assistant GrowthBook flag acts as a remote kill
- * switch, and kairosActive state must be true (set during bootstrap when
- * the session qualifies for KAIROS features).
+ * Called by main.tsx BEFORE setKairosActive(true) — must NOT check
+ * kairosActive (that would deadlock: gate needs active, active needs gate).
+ * The caller (main.tsx L1826-1832) sets kairosActive after this returns true.
  */
 export async function isKairosEnabled(): Promise<boolean> {
   if (!feature('KAIROS')) {
     return false
   }
-  if (
-    !getFeatureValue_CACHED_MAY_BE_STALE('tengu_kairos_assistant', false)
-  ) {
+  if (!getFeatureValue_CACHED_MAY_BE_STALE('tengu_kairos_assistant', false)) {
     return false
   }
-  return getKairosActive()
+  return true
 }