Replace go-imap library with custom IMAP client, simplify CV layout styles, bump vite, move SEED_DB to backend

- Rewrite email_imap.go to use a minimal hand-rolled IMAP client instead of go-imap/go-message,
  for better compatibility with Outlook's non-standard responses
- Consolidate and simplify CVLayout.vue CSS overrides
- Bump vite from 7.1.11 to 7.3.2
- Move SEED_DB env var from nginx to backend in dev compose
- Add /app/src/wasm volume exclusion in dev compose

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

vue/package.json

@@ -29,7 +29,7 @@
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^6.0.1",
-    "vite": "^7.1.11",
+    "vite": "^7.3.2",
     "vite-plugin-top-level-await": "^1.6.0",
     "vite-plugin-vue-devtools": "^8.0.3",
     "vite-plugin-wasm": "^3.6.0"