feat(dashboard): add sidebar with Ollama status, trending topics, and article detail panel

Integrate SearXNG news search, Ollama-powered article summarization with
follow-up chat, and a dashboard sidebar showing LLM status, trending
keywords, and recent search history. Sidebar yields to a split-view
article detail panel when a card is selected.

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

src/components/mod.rs

@@ -1,6 +1,8 @@
 mod app_shell;
+mod article_detail;
 mod card;
 mod chat_bubble;
+mod dashboard_sidebar;
 mod file_row;
 mod login;
 mod member_row;
@@ -12,8 +14,10 @@ pub mod sub_nav;
 mod tool_card;
 
 pub use app_shell::*;
+pub use article_detail::*;
 pub use card::*;
 pub use chat_bubble::*;
+pub use dashboard_sidebar::*;
 pub use file_row::*;
 pub use login::*;
 pub use member_row::*;