chore: 添加 pi 配置和 OpenSpec 工作流

- 添加 .pi/mcp.json 用于 MCP 服务器配置
- 添加 .pi/extensions/pi-permission-system 权限配置
- 更新 .gitignore 只追踪 .pi/mcp.json 和 .pi/extensions

.gitignore

@@ -403,6 +403,9 @@ cython_debug/
 !.claude/settings.json
 .opencode
 .codex
+.pi/*
+!.pi/mcp.json
+!.pi/extensions
 openspec/changes/archive
 temp
 .agents

.pi/extensions/pi-permission-system/config.json

@@ -0,0 +1,16 @@
+{
+  "$schema": "https://raw.githubusercontent.com/gotgenes/pi-permission-system/main/schemas/permissions.schema.json",
+  "permission": {
+    "*": "allow",
+    "bash": {
+      "npm *": "deny",
+      "npx *": "deny",
+      "pnpm *": "deny",
+      "pnpx *": "deny"
+    },
+    "external_directory": {
+      "*": "ask",
+      "/tmp/*": "allow"
+    }
+  }
+}

.pi/mcp.json

@@ -0,0 +1,8 @@
+{
+  "mcpServers": {
+    "tdesign-mcp-server": {
+      "command": "bunx",
+      "args": ["tdesign-mcp-server@latest"]
+    }
+  }
+}