Fix: React to external URL changes and cap tag-row height in library

Clicking the Reactbin home link (or any navigation to / that removes
?page=) now resets the displayed page by subscribing to queryParamMap
for post-init URL changes. Cards with many tags no longer push the
pagination bar down since the tag row is clamped to one line.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ui/src/app/library/library.component.spec.ts

@@ -8,12 +8,10 @@ import { ImageService } from '../services/image.service';
 import { routes } from '../app.routes';
 
 function makeActivatedRoute(queryParams: Record<string, string> = {}) {
+  const paramMap = { get: (key: string) => queryParams[key] ?? null };
   return {
-    snapshot: {
+    snapshot: { queryParamMap: paramMap },
-      queryParamMap: {
+    queryParamMap: of(paramMap),
-        get: (key: string) => queryParams[key] ?? null,
-      },
-    },
   };
 }
 

ui/src/app/library/library.component.ts

@@ -6,7 +6,7 @@ import {
 } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { Router, RouterLink, ActivatedRoute } from '@angular/router';
-import { Subject, debounceTime, distinctUntilChanged, share, timer } from 'rxjs';
+import { Subject, debounceTime, distinctUntilChanged, share, skip, timer } from 'rxjs';
 import { takeUntil } from 'rxjs/operators';
 import { ImageRecord, ImageService } from '../services/image.service';
 import { TagService } from '../services/tag.service';
@@ -21,7 +21,7 @@ const PLACEHOLDER_SVG = `data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/s
   template: `
     <div class="library">
       <header>
-        <h1>Reactbin</h1>
+        <h1><a class="home-link" (click)="router.navigate(['/'])">Reactbin</a></h1>
         <div class="header-actions">
           <a routerLink="/tags" class="tags-link">Browse tags</a>
           <button class="upload-btn" (click)="router.navigate(['/upload'])">Upload</button>
@@ -118,7 +118,8 @@ const PLACEHOLDER_SVG = `data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/s
     .image-card:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,0.4); }
     .image-card img { width: 100%; height: 160px; object-fit: cover; display: block; }
     .card-skeleton { height: 200px; }
-    .tag-row { padding: 6px; display: flex; flex-wrap: wrap; gap: 4px; }
+    .tag-row { padding: 6px; display: flex; flex-wrap: wrap; gap: 4px; overflow: hidden; max-height: 2rem; }
+    .home-link { color: inherit; text-decoration: none; cursor: pointer; }
     .empty-state { text-align: center; padding: 60px 0; color: var(--text-muted); }
     .empty-icon { display: block; font-size: 2rem; margin-bottom: 12px; }
     .upload-link { display: inline-block; margin-top: 16px; color: var(--accent); text-decoration: none; font-weight: 600; }
@@ -166,6 +167,21 @@ export class LibraryComponent implements OnInit {
       this.currentPage = Math.max(1, parseInt(pageParam, 10) || 1);
     }
     this.load();
+    this.route.queryParamMap.pipe(skip(1)).subscribe((params) => {
+      const newPage = params.get('page') ? Math.max(1, parseInt(params.get('page')!, 10) || 1) : 1;
+      const newTagsParam = params.get('tags');
+      const newTags = newTagsParam
+        ? newTagsParam.split(',').map((t) => t.trim()).filter((t) => t.length > 0)
+        : [];
+      const pageChanged = newPage !== this.currentPage;
+      const tagsChanged = JSON.stringify(newTags) !== JSON.stringify(this.activeFilters);
+      if (pageChanged || tagsChanged) {
+        this.currentPage = newPage;
+        this.activeFilters = newTags;
+        this.images = [];
+        this.load();
+      }
+    });
     this.filterChange$.pipe(debounceTime(300), distinctUntilChanged()).subscribe((q) => {
       if (q) {
         this.tagService.list(q, 10).subscribe((r) => {