refactor: rename frontend pages to PascalCase with Page suffix

Renamed 18 page files:
- dashboard.tsx → DashboardPage.tsx
- projects.tsx → ProjectsPage.tsx
- sessions.tsx → SessionsPage.tsx
- settings.tsx → SettingsPage.tsx
- ssh-keys.tsx → SshKeysPage.tsx
- terminal.tsx → TerminalPage.tsx
- tool-workshop.tsx → ToolWorkshopPage.tsx
- config-profiles.tsx → ConfigProfilesPage.tsx
- git-repositories.tsx → GitRepositoriesPage.tsx
- repo-workspace.tsx → RepoWorkspacePage.tsx
- workspaces.tsx → WorkspacesPage.tsx
- workspace-detail.tsx → WorkspaceDetailPage.tsx
- profile.tsx → ProfilePage.tsx
- project-settings.tsx → ProjectSettingsPage.tsx
- git-history.tsx → GitHistoryPage.tsx
- placeholder.tsx → PlaceholderPage.tsx

Updated router.tsx imports.

Quality gates: verified no remaining old imports.

apps/web/src/router.tsx

@@ -2,21 +2,21 @@ import { Navigate, Route, Routes } from "react-router-dom";
 
 import { AppShell } from "./components/app-shell";
 import { ProtectedRoute } from "./components/protected-route";
-import { HomePage } from "./pages/dashboard";
-import { LoginRedirectPage, NotFoundPage } from "./pages/placeholder";
-import { ProfilePage } from "./pages/profile";
-import { ProjectsPage } from "./pages/projects";
-import { GitRepositoriesPage } from "./pages/git-repositories";
-import { GitHistoryPage } from "./pages/git-history";
-import { ProjectSettingsPage } from "./pages/project-settings";
-import { SettingsPage, GeneralSettingsTab } from "./pages/settings";
-import { TerminalPage } from "./pages/terminal";
-import { ToolWorkshopPage } from "./pages/tool-workshop";
-import { SSHKeysPage } from "./pages/ssh-keys";
-import { ConfigProfilesPage } from "./pages/config-profiles";
-import { SessionsPage } from "./pages/sessions";
-import { WorkspacesPage } from "./pages/workspaces";
-import { WorkspaceDetailPage } from "./pages/workspace-detail";
+import { HomePage } from "./pages/DashboardPage";
+import { LoginRedirectPage, NotFoundPage } from "./pages/PlaceholderPage";
+import { ProfilePage } from "./pages/ProfilePage";
+import { ProjectsPage } from "./pages/ProjectsPage";
+import { GitRepositoriesPage } from "./pages/GitRepositoriesPage";
+import { GitHistoryPage } from "./pages/GitHistoryPage";
+import { ProjectSettingsPage } from "./pages/ProjectSettingsPage";
+import { SettingsPage, GeneralSettingsTab } from "./pages/SettingsPage";
+import { TerminalPage } from "./pages/TerminalPage";
+import { ToolWorkshopPage } from "./pages/ToolWorkshopPage";
+import { SSHKeysPage } from "./pages/SshKeysPage";
+import { ConfigProfilesPage } from "./pages/ConfigProfilesPage";
+import { SessionsPage } from "./pages/SessionsPage";
+import { WorkspacesPage } from "./pages/WorkspacesPage";
+import { WorkspaceDetailPage } from "./pages/WorkspaceDetailPage";
 
 export const AppRouter = () => {
 	return (