feat(ccw): migrate backend to TypeScript

- Convert 40 JS files to TypeScript (CLI, tools, core, MCP server)
- Add Zod for runtime parameter validation
- Add type definitions in src/types/
- Keep src/templates/ as JavaScript (dashboard frontend)
- Update bin entries to use dist/
- Add tsconfig.json with strict mode
- Add backward-compatible exports for tests
- All 39 tests passing

Breaking changes: None (backward compatible)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

ccw/package.json

@@ -3,12 +3,15 @@
   "version": "6.1.4",
   "description": "Claude Code Workflow CLI - Dashboard viewer for workflow sessions and reviews",
   "type": "module",
-  "main": "src/index.js",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
   "bin": {
     "ccw": "./bin/ccw.js",
     "ccw-mcp": "./bin/ccw-mcp.js"
   },
   "scripts": {
+    "build": "tsc",
+    "dev": "tsx watch src/cli.ts",
     "test": "node --test tests/*.test.js",
     "test:codexlens": "node --test tests/codex-lens*.test.js",
     "test:mcp": "node --test tests/mcp-server.test.js",
@@ -36,10 +39,12 @@
     "gradient-string": "^2.0.2",
     "inquirer": "^9.2.0",
     "open": "^9.1.0",
-    "ora": "^7.0.0"
+    "ora": "^7.0.0",
+    "zod": "^4.1.13"
   },
   "files": [
     "bin/",
+    "dist/",
     "src/",
     "README.md",
     "LICENSE"
@@ -47,5 +52,12 @@
   "repository": {
     "type": "git",
     "url": "https://github.com/claude-code-workflow/ccw"
+  },
+  "devDependencies": {
+    "@types/gradient-string": "^1.1.6",
+    "@types/inquirer": "^9.0.9",
+    "@types/node": "^25.0.1",
+    "tsx": "^4.21.0",
+    "typescript": "^5.9.3"
   }
 }