0.2.1 Release (#32)

* feat(security): implement CSRF protection

* chore: clean up CSRF implementation

  - Remove unused generateCsrfToken export from security.ts
  - Remove redundant /csrf-token path check (GET already exempt)
  - Restore defineConfig wrapper in vitest.config.ts for type safety

* add K8S note in README, fix broken e2e

* feat/upload-bar (#30)

* feat/upload-bar: add a upload bar when user upload file, indicate the upload process

* feat/save-loading-status: add save status when click back button from editor

* fix: address PR review issues in upload and save features

- Replace deprecated substr() with substring() in UploadContext
- Fix broken error handling that checked stale task status
- Fix missing useEffect dependency in UploadStatus
- Fix CSS class conflict in progress bar styling
- Add error recovery for save state in Editor (reset on failure)
- Use .finally() instead of .then() to ensure refresh on upload failure
- Fix inconsistent indentation in UploadContext

* fix e2e tests

---------

Co-authored-by: Zimeng Xiong <zxzimeng@gmail.com>

* chore: pre-release v0.2.1-dev

* Update backend/src/security.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix filename/math random UUID generation

---------

Co-authored-by: AdrianAcala <adrianacala017@gmail.com>
Co-authored-by: adamant368 <60790941+Yiheng-Liu@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

frontend/src/App.tsx

@@ -3,18 +3,21 @@ import { Dashboard } from './pages/Dashboard';
 import { Editor } from './pages/Editor';
 import { Settings } from './pages/Settings';
 import { ThemeProvider } from './context/ThemeContext';
+import { UploadProvider } from './context/UploadContext';
 
 function App() {
   return (
     <ThemeProvider>
-      <Router>
-        <Routes>
-          <Route path="/" element={<Dashboard />} />
-          <Route path="/collections" element={<Dashboard />} />
-          <Route path="/settings" element={<Settings />} />
-          <Route path="/editor/:id" element={<Editor />} />
-        </Routes>
-      </Router>
+      <UploadProvider>
+        <Router>
+          <Routes>
+            <Route path="/" element={<Dashboard />} />
+            <Route path="/collections" element={<Dashboard />} />
+            <Route path="/settings" element={<Settings />} />
+            <Route path="/editor/:id" element={<Editor />} />
+          </Routes>
+        </Router>
+      </UploadProvider>
     </ThemeProvider>
   );
 }