fix: adjust content scale and blur settings in chat page for improved visual clarity

- Set contentScaleDelta and contentBlurSigma to 0.0 in the chat page, ensuring a clearer visual presentation without unintended scaling or blurring effects.
- This change enhances the user experience by providing a more focused and readable chat interface.

lib/features/chat/views/chat_page.dart

@@ -1206,6 +1206,8 @@ class _ChatPageState extends ConsumerState<ChatPage> {
               edgeFraction: edgeFraction,
               settleFraction: 0.06, // even gentler settle for instant open feel
               scrimColor: scrim,
+              contentScaleDelta: 0.0,
+              contentBlurSigma: 0.0,
               onOpenStart: () {
                 // Suppress composer auto-focus once we unfocus for the drawer
                 try {