Initialize Tauri v2 + React + TypeScript project with vault scanner

- Scaffold Vite + React + TypeScript frontend
- Add Tauri v2 backend with Rust
- Implement list_vault command: recursively scans .md files, parses
  YAML frontmatter (Is A, aliases, Belongs to, Related to, Status,
  Owner, Cadence), extracts title from H1 or filename
- 10 passing Rust tests for frontmatter parsing and vault scanning
- Configure Vitest and Playwright (test infrastructure)

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

tsconfig.node.json

@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "ES2023",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "types": ["node"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["vite.config.ts"]
+}