feat: 接入 Pi 内置 codemode，并修复全面审查发现的问题

- codemode：Tool Search 常驻（alwaysEnabled）、权限 allow（嵌套调用仍逐个过权限门）、
  tools.jsonc 登记使用规则；RTK 跳过 parentToolCallId 嵌套调用，避免丢失 bash
  structuredContent；Tool Search 目录过滤 hidden / codemode（script-only）exposure；
  扩展加载测试加载 builtin:codemode 并断言其常驻激活
- 搜索 key 不再经命令行参数传递：search-auth.mjs 改为 --set-stdin（先读校验再加锁），
  configure.sh 交互输入经管道、非交互用 --<provider> -
- CodeGraph 客户端监听子进程 stdin error，避免 EPIPE 未处理导致崩溃
- 移除 PI_TOOL_SEARCH/HERMES_MEMORY/RTK_CONFIG_PATH 环境变量入口，测试改用工厂 configPath 注入
- pi-subagents 固定 vitest / coverage-istanbul 4.1.10，修复 npm ls 版本冲突
- 补 pi-web-search / pi-worktree UPSTREAM.md 与 pi-minimal-footer AGENTS.md，
  files 白名单补齐并加测试；.codegraph/.gitignore 移出跟踪
- detect_kitty 优先识别官方安装目录

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

pi-hermes-memory/tests/project-rebinding.test.ts

@@ -18,11 +18,11 @@ describe("session project memory rebinding", () => {
     const launchDir = await fs.mkdtemp(path.join(os.tmpdir(), "pi-project-rebind-launch-"));
     const targetDir = await fs.mkdtemp(path.join(os.tmpdir(), "pi-project-rebind-target-"));
     const previousAgentRoot = process.env.PI_CODING_AGENT_DIR;
-    const previousConfigPath = process.env.PI_HERMES_MEMORY_CONFIG_PATH;
+    const configPath = path.join(agentRoot, "hermes-memory-config.json");
     const previousCwd = process.cwd();
     try {
       await fs.writeFile(
-        path.join(agentRoot, "hermes-memory-config.json"),
+        configPath,
         JSON.stringify({
           memoryMode: "legacy-inject",
           reviewEnabled: false,
@@ -47,10 +47,10 @@ describe("session project memory rebinding", () => {
       );
 
       process.env.PI_CODING_AGENT_DIR = agentRoot;
-      process.env.PI_HERMES_MEMORY_CONFIG_PATH = path.join(agentRoot, "hermes-memory-config.json");
       process.chdir(launchDir);
       // Import after setting PI_CODING_AGENT_DIR so AGENT_ROOT is test-local.
-      const { default: registerExtension } = await import("../src/index.js");
+      const { createHermesMemoryExtension } = await import("../src/index.js");
+      const registerExtension = createHermesMemoryExtension({ configPath });
       const mockPi: MockPi = {
         handlers: {},
         tools: {},
@@ -103,8 +103,6 @@ describe("session project memory rebinding", () => {
       process.chdir(previousCwd);
       if (previousAgentRoot === undefined) delete process.env.PI_CODING_AGENT_DIR;
       else process.env.PI_CODING_AGENT_DIR = previousAgentRoot;
-      if (previousConfigPath === undefined) delete process.env.PI_HERMES_MEMORY_CONFIG_PATH;
-      else process.env.PI_HERMES_MEMORY_CONFIG_PATH = previousConfigPath;
       await fs.rm(agentRoot, { recursive: true, force: true });
       await fs.rm(launchDir, { recursive: true, force: true });
       await fs.rm(targetDir, { recursive: true, force: true });