refactor: 移除 context-mode，Chrome 快照改为直接返回

context-mode 的 ctx_execute 系工具以真实 shell 执行且权限为 allow，绕过了
bash 策略与 protectedWrites；其每轮注入、独立 MCP 子进程与 skills 也与组合包
提示词单一所有权冲突。大输出职责已由 pi-overflow（入口截断）与
pi-compaction（压力遮蔽）承担：
- 删除 context-mode 依赖、wrapper/过滤器、skills，以及 ctx_* 的权限、
  tools.jsonc、路由规则、tool-search 常驻与 4 个分组
- better-sqlite3@12 仅为 context-mode 传递依赖，随之移除根 allowScripts
- pi-chrome：按用户决定移除快照隐私规则与 .pi/chrome-context 临时文件机制，
  快照 JSON 直接作为工具结果返回、details 只留小型元数据，超长由 pi-overflow
  截断并用 overflow_query 提取；授权生命周期不变

Generated with [Devin](https://devin.ai)

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

pi-tool-search/README.md

@@ -33,10 +33,6 @@ Run `/tool-search-status` to inspect the current catalog source, pinned count, d
 | `ssh-remote-shell` | `ssh_cd`, `ssh_bash` |
 | `code-intelligence` | CodeGraph and all LSP tools |
 | `web-search` | `web_search`, `web_fetch` (pi-web-search unified tools) |
-| `context-execution` | `ctx_execute`, `ctx_execute_file`, `ctx_batch_execute` |
-| `context-knowledge` | Context indexing, searching, and web-doc ingestion |
-| `context-observability` | Context stats, doctor, and Insight |
-| `context-administration` | Context upgrade and destructive purge |
 | `memory-recall` | Hermes memory/session search and condensed-output recovery |
 | `memory-management` | Hermes memory writes and procedural skill management |
 | `subagents` | Launch agents, collect background results, and steer running agents |
@@ -45,7 +41,7 @@ Run `/tool-search-status` to inspect the current catalog source, pinned count, d
 | `chrome-interaction` | Chrome click/type/fill/key/hover/drag/tap/scroll input |
 | `chrome-debugging` | Chrome page evaluation, console/network diagnostics, response retrieval, and file upload |
 
-Pinned tools are removed from these dynamic groups at runtime. The defaults pin `codegraph_explore`, `lsp_diagnostics`, the three high-frequency Context Mode execution tools, and all six Hermes memory tools, so none of them consume dynamic group or tool capacity.
+Pinned tools are removed from these dynamic groups at runtime. The defaults pin `codegraph_explore`, `lsp_diagnostics`, and all six Hermes memory tools, so none of them consume dynamic group or tool capacity.
 
 ## Loading and eviction
 
@@ -78,9 +74,6 @@ Pi reads this configuration directly from the installed bundle's `config/tool-se
   "alwaysEnabled": [
     "codegraph_explore",
     "lsp_diagnostics",
-    "ctx_execute",
-    "ctx_execute_file",
-    "ctx_batch_execute",
     "memory_search",
     "session_search",
     "memory_add",
@@ -100,7 +93,7 @@ Pi reads this configuration directly from the installed bundle's `config/tool-se
 
 | Key | Bundle default | Description |
 |---|---|---|
-| `alwaysEnabled` | CodeGraph explore, LSP diagnostics, Context execution trio, all six Hermes memory tools, `context_tree_query`, `overflow_query` | Exact names pinned alongside Pi core tools |
+| `alwaysEnabled` | CodeGraph explore, LSP diagnostics, all six Hermes memory tools, `context_tree_query`, `overflow_query` | Exact names pinned alongside Pi core tools |
 | `showToolSearchFooterStatus` | `false` | Show active tool/group counts |
 | `maxActiveGroups` | `5` | Maximum simultaneously active dynamic groups |
 | `maxToolsPerGroup` | `8` | Maximum size accepted from model-generated groups |