Initial commit: Fast Inventory app

Monorepo with Express + SQLite backend and Vite + React frontend.
Features: item CRUD, file uploads with thumbnails, soft delete,
item duplication with file copying, autocomplete inputs, stats dashboard.

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

tsconfig.base.json

@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ES2022",
+    "moduleResolution": "bundler",
+    "esModuleInterop": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true
+  }
+}