Improve camera model search with per-model ranking and two-stage loading

- Split camera results into individual models (Brand: Model format)
- Add model-specific relevance scoring for better search results
- Implement two-stage autocomplete: 10 results immediately, 50 after 1 second
- Filter out "Other" models from search results
- Sort models by relevance score (exact matches first)
- Add auto.json brand for automatic detection fallback

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

webui/web/js/utils/toast.js

@@ -0,0 +1,13 @@
+export function showToast(message, duration = 3000) {
+    const toast = document.getElementById('toast');
+    toast.textContent = message;
+    toast.classList.remove('hidden');
+    toast.classList.add('show');
+
+    setTimeout(() => {
+        toast.classList.remove('show');
+        setTimeout(() => {
+            toast.classList.add('hidden');
+        }, 250);
+    }, duration);
+}