Rename to My Collection, add favicon to sidebar and login

- Replaced all 'B4L Repair' references with 'My Collection'
- Added favicon.png next to the title in the sidebar
- Added favicon.png on the login page above the title
- Updated all page <title> tags

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/lib/components/layout/Sidebar.svelte

@@ -67,7 +67,10 @@
 >
 	<!-- Logo -->
 	<div class="flex h-14 items-center border-b border-gray-200 px-4 dark:border-gray-700">
-		<a href="/" class="text-lg font-bold text-gray-900 dark:text-white">B4L Repair</a>
+		<a href="/" class="flex items-center gap-2 text-lg font-bold text-gray-900 dark:text-white">
+			<img src="/favicon.png" alt="" class="h-6 w-6" />
+			My Collection
+		</a>
 	</div>
 
 	<!-- Navigation -->