feat(app): redesign magazine grid, improve article views and proxy

- Redesign MagazineGrid with editorial New Yorker-inspired layout
- Simplify ArticleDetail and ArticleOverlay components
- Enhance claude-proxy with improved content extraction
- Add HTML utility for content processing
- Update NewsCard styling and chat message handling
- Clean up worktree references

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

packages/core/src/plugins/registry.ts

@@ -1,4 +1,4 @@
-import { ref, readonly } from 'vue'
+import { type DeepReadonly, type Ref, ref, readonly } from 'vue'
 import type { AIUIPlugin, PluginType } from '../types/plugin'
 import type { RendererDefinition } from '../types/renderer'
 
@@ -47,5 +47,5 @@ export function getAllRenderers(): RendererDefinition[] {
   return Array.from(renderers.value.values())
 }
 
-export const pluginRegistry = readonly(plugins)
-export const rendererRegistry = readonly(renderers)
+export const pluginRegistry: DeepReadonly<Ref<Map<string, AIUIPlugin>>> = readonly(plugins)
+export const rendererRegistry: DeepReadonly<Ref<Map<string, RendererDefinition>>> = readonly(renderers)