build(app): migrate to electron-vite (main/preload/renderer), keep electron-builder (Phase 5d-3a)

Restructure app into src/{main,preload,renderer}; electron.vite.config.ts builds
all three (each main module its own input so CJS requires + the indexer worker
resolve; better-sqlite3 externalized; Vue plugin for renderer). main/index.js
paths updated for the out/ layout + ELECTRON_RENDERER_URL. Still JS/CJS — TS+ESM
and core consumption are the next stages. Verified: npm run dev launches clean;
electron-vite build succeeds; root suite 119/119.

app/package.json

@@ -2,18 +2,16 @@
   "name": "obelisk",
   "version": "0.1.0",
   "description": "Memory management for Obelisk — let Claude Code search its own memory",
-  "main": "main.js",
+  "main": "out/main/index.js",
   "scripts": {
-    "start": "electron .",
-    "dev": "node scripts/dev.js",
-    "dev:renderer": "vite renderer",
-    "build:renderer": "vite build renderer",
-    "build": "npm run build:renderer && electron-builder",
-    "pack": "npm run build:renderer && electron-builder --dir",
-    "dist": "npm run build:renderer && electron-builder --mac --win --linux",
-    "dist:mac": "npm run build:renderer && electron-builder --mac",
-    "dist:win": "npm run build:renderer && electron-builder --win",
-    "dist:linux": "npm run build:renderer && electron-builder --linux"
+    "start": "electron-vite preview",
+    "dev": "electron-vite dev",
+    "build": "electron-vite build && electron-builder",
+    "pack": "electron-vite build && electron-builder --dir",
+    "dist": "electron-vite build && electron-builder --mac --win --linux",
+    "dist:mac": "electron-vite build && electron-builder --mac",
+    "dist:win": "electron-vite build && electron-builder --win",
+    "dist:linux": "electron-vite build && electron-builder --linux"
   },
   "build": {
     "appId": "com.obelisk.app",
@@ -45,14 +43,10 @@
       "category": "Development"
     },
     "files": [
-      "main.js",
-      "preload.js",
-      "recap-capture-query.js",
-      "indexer.js",
-      "indexer-service.js",
-      "indexer-worker.js",
-      "indexer-worker-client.js",
-      "dist-renderer/**/*"
+      "out/**"
+    ],
+    "asarUnpack": [
+      "**/node_modules/better-sqlite3/**"
     ],
     "extraResources": [
       {
@@ -72,6 +66,7 @@
     "@vitejs/plugin-vue": "^5.0.0",
     "electron": "^33.0.0",
     "electron-builder": "^25.0.0",
+    "electron-vite": "^5.0.0",
     "vite": "^6.0.0",
     "vue": "^3.4.0",
     "vue-router": "^4.3.0"