Initial Switch to V2. Completely Overhauled Backend, Frontend and General Structure.

frontend/src/lib/loadQuill.js

@@ -0,0 +1,29 @@
+// frontend/src/lib/loadQuill.js
+// Shared Quill CDN loader — ensures the script is only injected once across
+// all modals (ComposeEmailModal, MailSettingsModal, etc.).
+// Calls cb() immediately if Quill is already on window, otherwise queues it.
+
+let _ready = false
+let _callbacks = []
+
+export function loadQuill(cb) {
+  if (_ready || window.Quill) { _ready = true; cb(); return }
+  _callbacks.push(cb)
+  if (document.getElementById('__quill_js__')) return // already injecting
+
+  const link = document.createElement('link')
+  link.id   = '__quill_css__'
+  link.rel  = 'stylesheet'
+  link.href = 'https://cdn.quilljs.com/1.3.7/quill.snow.css'
+  document.head.appendChild(link)
+
+  const script  = document.createElement('script')
+  script.id     = '__quill_js__'
+  script.src    = 'https://cdn.quilljs.com/1.3.7/quill.min.js'
+  script.onload = () => {
+    _ready = true
+    _callbacks.forEach(fn => fn())
+    _callbacks = []
+  }
+  document.head.appendChild(script)
+}