Implement settings toggle logic and refactor sidebar navigation

- Close NK-s8nytj: Settings page close behavior
- Update frontend-vanilla/src/main.ts to toggle settings/filter navigation
- Add tests in frontend-vanilla/src/main.test.ts for navigation logic
- Created NK-gxvegm for feed/tag settings behavior
- Created NK-f64ocp for routing logic refactor

2 files changed, 39 insertions, 2 deletions

diff --git a/frontend-vanilla/src/main.test.ts b/frontend-vanilla/src/main.test.ts
index a8b6969..d397a5e 100644
--- a/frontend-vanilla/src/main.test.ts
+++ b/frontend-vanilla/src/main.test.ts
@@ -293,4 +293,31 @@ describe('main application logic', () => {
             body: expect.stringContaining('"read":true')
         }));
     });
+
+    it('should close settings and return to home when clicking settings again', () => {
+        renderLayout();
+        const settingsLink = document.querySelector('[data-nav="settings"]') as HTMLElement;
+        expect(settingsLink).not.toBeNull();
+
+        const getCurrentRouteSpy = vi.spyOn(router, 'getCurrentRoute').mockReturnValue({ path: '/settings', params: {}, query: new URLSearchParams() });
+        const navigateSpy = vi.spyOn(router, 'navigate');
+
+        settingsLink.click();
+
+        expect(navigateSpy).toHaveBeenCalledWith('/', expect.any(Object));
+        getCurrentRouteSpy.mockRestore();
+    });
+
+    it('should navigate to home with filter when clicking filter from settings', () => {
+        renderLayout();
+        const getCurrentRouteSpy = vi.spyOn(router, 'getCurrentRoute').mockReturnValue({ path: '/settings', params: {}, query: new URLSearchParams() });
+        const navigateSpy = vi.spyOn(router, 'navigate');
+
+        const filterLink = document.querySelector('a[data-nav="filter"][data-value="starred"]') as HTMLElement;
+        expect(filterLink).not.toBeNull();
+        filterLink.click();
+
+        expect(navigateSpy).toHaveBeenCalledWith('/', expect.objectContaining({ filter: 'starred' }));
+        getCurrentRouteSpy.mockRestore();
+    });
 });
diff --git a/frontend-vanilla/src/main.ts b/frontend-vanilla/src/main.ts
index b167a18..c22dd26 100644
--- a/frontend-vanilla/src/main.ts
+++ b/frontend-vanilla/src/main.ts
@@ -114,7 +114,12 @@ export function attachLayoutListeners() {
     if (navType === 'filter') {
       e.preventDefault();
       const filter = link.getAttribute('data-value') as FilterType;
-      router.updateQuery({ filter });
+      const currentRoute = router.getCurrentRoute();
+      if (currentRoute.path === '/settings') {
+        router.navigate('/', { ...currentQuery, filter });
+      } else {
+        router.updateQuery({ filter });
+      }
     } else if (navType === 'tag') {
       e.preventDefault();
       const tag = link.getAttribute('data-value')!;
@@ -129,7 +134,12 @@ export function attachLayoutListeners() {
       }
     } else if (navType === 'settings') {
       e.preventDefault();
-      router.navigate('/settings', currentQuery);
+      const currentRoute = router.getCurrentRoute();
+      if (currentRoute.path === '/settings') {
+        router.navigate('/', currentQuery);
+      } else {
+        router.navigate('/settings', currentQuery);
+      }
     }
 
     // Auto-close sidebar on mobile after clicking a link