feat: move plugin workspace into project settings

tests/unit/login-page.test.tsx

@@ -81,7 +81,7 @@ function renderLogin(initialEntries: React.ComponentProps<typeof MemoryRouter>['
       <Routes>
         <Route path="/login" element={<Login />} />
         <Route path="/module-select" element={<div>Module Selection</div>} />
-        <Route path="/plugins" element={<LocationProbe />} />
+        <Route path="/project-config/plugins" element={<LocationProbe />} />
       </Routes>
     </MemoryRouter>,
   );
@@ -91,7 +91,7 @@ function renderPluginLoginJourney(canonicalPath: string) {
   return render(
     <MemoryRouter initialEntries={[canonicalPath]}>
       <Routes>
-        <Route path="/plugins" element={<PluginSignInAction />} />
+        <Route path="/project-config/plugins" element={<PluginSignInAction />} />
         <Route path="/login" element={<Login />} />
         <Route path="/module-select" element={<div>Module Selection</div>} />
       </Routes>
@@ -245,7 +245,7 @@ describe('Login page', () => {
   });
 
   it('returns a signed-out plugin action to the exact canonical workspace query after login', async () => {
-    const canonicalPath = '/plugins?scope=all&source=official&state=available&q=notes&plugin=official%3Amakelore.notes';
+    const canonicalPath = '/project-config/plugins?scope=all&source=official&state=available&q=notes&plugin=official%3Amakelore.notes';
     loginWithPassword.mockImplementation(async () => {
       useAuthStore.setState({ accessToken: 'password-access-token' });
     });