feat: bootstrap secure cross-platform assistant

Establish the Electron foundation and pluggable agent runtime so desktop workflows can evolve safely across supported platforms.

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

tsconfig.web.json

@@ -0,0 +1,20 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "target": "ES2022",
+    "jsx": "react-jsx",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "types": ["vite/client", "vitest/globals", "@testing-library/jest-dom"],
+    "strict": true,
+    "noUncheckedIndexedAccess": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "skipLibCheck": true
+  },
+  "include": [
+    "src/renderer/src/**/*.ts",
+    "src/renderer/src/**/*.tsx"
+  ]
+}