fix(auth, pwa): restore api.auth.me, bump PWA cache to v5.3, and fix CEFR CSS styling

app/static/css/style.css

@@ -4227,6 +4227,54 @@ body {
     width: 100%;
 }
 
+.cefr-overview-container,
+.cefr-quiz-container,
+.cefr-summary-container {
+    width: 100%;
+}
+
+.level-code {
+    font-weight: 800;
+}
+
+.badge-pos {
+    font-size: 11px;
+    font-weight: 700;
+    text-transform: uppercase;
+    background: var(--bg-hover);
+    color: var(--text-muted);
+    padding: 3px 8px;
+    border-radius: var(--radius-sm);
+    border: 1px solid var(--border-color);
+}
+
+.clue-icon {
+    font-size: 16px;
+}
+
+.clue-label {
+    font-size: 13px;
+    color: var(--text-muted);
+    font-weight: 500;
+}
+
+.cefr-feedback-box .fb-term {
+    font-size: 16px;
+    color: var(--text-main);
+    font-weight: 700;
+}
+
+.cefr-feedback-box .fb-trans {
+    font-size: 14.5px;
+    color: var(--text-main);
+    font-weight: 500;
+}
+
+.progress-labels-row .counts-text {
+    font-size: 12px;
+    color: var(--text-muted);
+}
+
 .cefr-header {
     margin-bottom: 28px;
 }