Fix UI review issues: accessibility, i18n, duplicate IDs, URL overflow

- Rename duplicate id="settings-error" to "device-settings-error"
- Add missing i18n key value_source.scene_sensitivity.hint (en/ru/zh)
- Add accessible label to password-toggle and Stop All buttons
- Add aria-hidden toggle on connection overlay
- Fix static image URL overflow with ellipsis truncation

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

server/src/wled_controller/static/css/patterns.css

@@ -59,9 +59,11 @@
 }
 
 .stream-card-prop-full {
-    max-width: 100%;
-    word-break: break-all;
-    white-space: normal;
+    flex: 1 1 100%;
+    min-width: 0;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
     font-size: 0.7rem;
 }