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

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

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

@@ -523,6 +523,7 @@ export const ChatContainer: React.FC = () => {
                         className="absolute inset-0 overflow-y-auto overflow-x-hidden z-0 chat-scroll overlay-scrollbar-target"
                         ref={scrollRef}
                         observeMutations={false}
+                        hideTopShadow={isMobile}
                         data-scroll-shadow="true"
                         data-scrollbar="chat"
                     >