First working prototype

jsconfig.json

@@ -3,31 +3,26 @@
     "moduleResolution": "bundler",
     "target": "ESNext",
     "module": "ESNext",
-    /**
-     * svelte-preprocess cannot figure out whether you have
-     * a value or a type, so tell TypeScript to enforce using
-     * `import type` instead of `import` for Types.
-     */
     "verbatimModuleSyntax": true,
     "isolatedModules": true,
     "resolveJsonModule": true,
-    /**
-     * To have warnings / errors of the Svelte compiler at the
-     * correct position, enable source maps by default.
-     */
     "sourceMap": true,
     "esModuleInterop": true,
     "types": ["vite/client"],
     "skipLibCheck": true,
+    "noEmit": true,
     /**
-     * Typecheck JS in `.svelte` and `.js` files by default.
-     * Disable this if you'd like to use dynamic types.
+     * Typecheck JS in `.svelte` and `.js` files. The data layer carries JSDoc
+     * typedefs (see src/lib/db.js), so schema mistakes are caught here.
+     *
+     * `strict` stays off deliberately: the app code is plain untyped JS, and
+     * turning it on demands ~200 annotations on component props and callbacks
+     * for very little bug-catching return. Revisit if this grows.
      */
-    "checkJs": true
+    "checkJs": true,
+    "strict": false
   },
-  /**
-   * Use global.d.ts instead of compilerOptions.types
-   * to avoid limiting type declarations.
-   */
+  /** Tests use vitest globals and fixtures; they are covered by `npm test`. */
+  "exclude": ["src/**/*.test.js"],
   "include": ["src/**/*.d.ts", "src/**/*.js", "src/**/*.svelte"]
 }