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/routes/(app)/checklists/+page.svelte

@@ -7,7 +7,7 @@
 </script>
 
 <svelte:head>
-	<title>Checklist Templates - B4L Repair</title>
+	<title>Checklist Templates - My Collection</title>
 </svelte:head>
 
 <div class="mx-auto max-w-4xl">

src/routes/(app)/checklists/[id]/+page.svelte

@@ -17,7 +17,7 @@
 </script>
 
 <svelte:head>
-	<title>{data.template.title} - Checklists - B4L Repair</title>
+	<title>{data.template.title} - Checklists - My Collection</title>
 </svelte:head>
 
 <div class="mx-auto max-w-3xl">