feat: config profiles top-level navigation with split-pane UI

- Move Config Profiles from settings to top-level navigation
- Implement split-pane layout: profile list on left, editor on right
- Add project and tool type dropdowns with live data
- Keep form open after save with success feedback
- Add sticky save bar at bottom of editor
- Remove Config Profiles tab from Settings page

OpenSpec: add-config-profiles

apps/web/src/router.tsx

@@ -37,11 +37,11 @@ export const AppRouter = () => {
         <Route path="projects/:projectId/repositories/:repoId/history" element={<GitHistoryPage />} />
         <Route path="projects/:projectId/settings/*" element={<ProjectSettingsPage />} />
         <Route path="profile" element={<ProfilePage />} />
+        <Route path="config-profiles" element={<ConfigProfilesPage />} />
         <Route path="settings" element={<SettingsPage />}>
           <Route index element={<Navigate to="general" replace />} />
           <Route path="general" element={<GeneralSettingsTab />} />
           <Route path="ssh-keys" element={<SSHKeysPage />} />
-          <Route path="config-profiles" element={<ConfigProfilesPage />} />
           <Route path="*" element={<Navigate to="general" replace />} />
         </Route>
         <Route path="sessions" element={<SessionsPage />} />