feat: enhance navigation and filtering behavior

- Added clickable app title links in header and sidebar that reset view to all markdown files
- Fixed quicklink filtering to use correct frontmatter boolean keys (favoris, publish, draft, etc.)
- Updated sidebar behavior to auto-open Quick Links section when viewing markdown files
- Added filter clearing when switching between views to prevent conflicting filters
- Modified URL state handling to preserve kind parameter when navigating
- Enforced markdown-only

src/app.component.simple.html

@@ -318,7 +318,9 @@
             <div class="min-w-0 flex flex-col gap-1">
               <div class="flex items-center gap-2 min-w-0">
                 <span class="inline-flex items-center rounded-lg border border-border bg-bg-muted/70 px-2.5 py-1 text-xs font-semibold uppercase tracking-wide text-text-muted">{{ vaultName() }}</span>
-                <h1 class="text-lg font-semibold leading-tight text-text-main">ObsiWatcher</h1>
+                <h1 class="text-lg font-semibold leading-tight text-text-main">
+                  <a href="/" (click)="onAppTitleClick($event)" class="hover:underline">ObsiWatcher</a>
+                </h1>
               </div>
               @if (selectedNoteBreadcrumb().length > 0) {
                 <p class="truncate text-xs text-text-muted">{{ selectedNoteBreadcrumb().join(' / ') }}</p>