feat: redesign settings pages to match canonical flat UI patterns (#493)

* refactor(settings): new IA shell + projects section + skills catalog discoverability

* chore(settings): split providers list by scope; show user before project

* fix: navigation flow in mobile Settings

* feat: redesign settings pages to use modern elevated surface patterns

* feat: replace helper text with tooltips in settings

* ui: redesign update dialog and fix external link routing

- Restructures UpdateDialog to focus on changelog readability with a wider max-w-4xl canvas
- Highlights @username contributor mentions with theme primary color
- Strips excessive vertical padding and right-aligns compact action buttons
- Disables streamdown's internal link safety dialog in favor of direct Tauri shell routing

* feat: refactor Git identities into dedicated Git settings page

* feat: unify sidebar background styling across VS Code and web/mobile

* fix: adjust button styling and layout for mobile settings pages

* feat: add MCP settings page and sidebar

* feat: hide models in provider view (thanks to @nguyenngothuong)

* feat: add "Add new provider" option to model selector dropdown

* fix: local evroc logo + provider dropdown icons

* fix: increase width of provider menu

* fix: dark theme background color for better contrast

* feat: update @opencode-ai/sdk dependency to v1.2.10

* fix: restore session sorting to only use updated time

* fix: added settings for sessions deletion dialog

* fix: adjust padding on settings pages for better layout

* fix: standardize select dropdown height across UI

* fix: agent selector UI and notification settings

* fix: remove redundant helper text from settings pages

* fix: update UI layout for description fields

* fix: remove border-none and shadow-none from textarea classes

* fix: enable context menu on sidebar items

* feat: refactor UI controls and layout patterns across settings pages

* fix: use headerless blocks when page title already provides context

* fix: remove subtask option from command settings

* fix: refactor mcp page settings

* fix: reduce spacing in skills configuration pages

* feat: refactor voice settings

* feat: refactor settings sidebar sections

packages/ui/src/components/views/git/PullRequestSection.tsx

@@ -278,15 +278,15 @@ export const PullRequestSection: React.FC<{
   const githubAuthStatus = useGitHubAuthStore((state) => state.status);
   const githubAuthChecked = useGitHubAuthStore((state) => state.hasChecked);
   const setSettingsDialogOpen = useUIStore((state) => state.setSettingsDialogOpen);
-  const setSidebarSection = useUIStore((state) => state.setSidebarSection);
+  const setSettingsPage = useUIStore((state) => state.setSettingsPage);
   const setActiveMainTab = useUIStore((state) => state.setActiveMainTab);
   const currentSessionId = useSessionStore((state) => state.currentSessionId);
   const { isMobile, hasTouchInput } = useDeviceInfo();
 
   const openGitHubSettings = React.useCallback(() => {
-    setSidebarSection('settings');
+    setSettingsPage('github');
     setSettingsDialogOpen(true);
-  }, [setSettingsDialogOpen, setSidebarSection]);
+  }, [setSettingsDialogOpen, setSettingsPage]);
 
   const snapshotKey = React.useMemo(() => getPullRequestSnapshotKey(directory, branch), [directory, branch]);
   const initialSnapshot = React.useMemo(