fix(chat): reduce user message padding and hide top scroll shadow on mobile (#496)

* fix(chat): reduce user message padding on mobile

* fix(mobile): limit drawer swipe gesture to status bar only

* fix(chat): hide top scroll shadow on mobile

* fix: add mobile edge-swipe drawer fallback and normalize comments

- Adds narrow left/right mobile edge swipe zones for drawer gestures
- Keeps drawer swipe access even when the mobile status bar is hidden
- Replaces remaining non-English comments in touched chat/layout files

* fix: remove edge swipe settings and tighten mobile chat spacing

---------

Co-authored-by: Jovines <jovines@qq.com>
Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/components/chat/ChatInput.tsx

@@ -2319,7 +2319,7 @@ export const ChatInput: React.FC<ChatInputProps> = ({ onOpenSettings, scrollToBo
                         )}
                     </div>
 
-                    {/* Mobile Session Status Bar - 在输入框上方 */}
+                    {/* Mobile Session Status Bar - above input */}
                     {isMobile && <MobileSessionStatusBar cornerRadius={cornerRadius} />}
                 </div>
             </div>