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>

eslint.config.js

@@ -0,0 +1,44 @@
+import js from '@eslint/js'
+import reactHooks from 'eslint-plugin-react-hooks'
+import globals from 'globals'
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  {
+    ignores: ['dist/**', 'node_modules/**', 'out/**', 'coverage/**']
+  },
+  js.configs.recommended,
+  ...tseslint.configs.recommended,
+  {
+    files: ['src/main/**/*.ts', 'src/preload/**/*.ts', 'src/shared/**/*.ts'],
+    languageOptions: {
+      globals: {
+        ...globals.node
+      }
+    }
+  },
+  {
+    files: ['src/renderer/src/**/*.{ts,tsx}'],
+    languageOptions: {
+      globals: {
+        ...globals.browser
+      }
+    },
+    plugins: {
+      'react-hooks': reactHooks
+    },
+    rules: {
+      ...reactHooks.configs.recommended.rules
+    }
+  },
+  {
+    files: ['**/*.test.{ts,tsx}', 'vitest.config.ts'],
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...globals.browser,
+        ...globals.vitest
+      }
+    }
+  }
+)