feat(admin,branding): Add favicon support and video blur component

- Add favicon_url column to nodes table via database migration
- Create favicon upload endpoint with media handling
- Implement favicon upload UI in admin panel with preview
- Add favicon removal functionality in admin settings
- Create BlurredVideo component for improved video rendering
- Update PostCard to use new BlurredVideo component
- Update node schema to include favicon_url field
- Add favicon upload state management and error handling
- Enables customization of browser tab icon for node branding

src/app/api/admin/node/route.ts

@@ -24,6 +24,7 @@ export async function PATCH(req: NextRequest) {
                 rules: data.rules,
                 bannerUrl: data.bannerUrl,
                 logoUrl: data.logoUrl,
+                faviconUrl: data.faviconUrl,
                 accentColor: data.accentColor,
                 isNsfw: data.isNsfw ?? false,
             }).returning();
@@ -36,6 +37,7 @@ export async function PATCH(req: NextRequest) {
                     rules: data.rules,
                     bannerUrl: data.bannerUrl,
                     logoUrl: data.logoUrl,
+                    faviconUrl: data.faviconUrl,
                     accentColor: data.accentColor,
                     isNsfw: data.isNsfw ?? node.isNsfw,
                     updatedAt: new Date(),