feat: make chunk modal title clickable link to documents

- Add clickable link to modal title with OpenInNew icon
- Store currentResult to enable document navigation
- Fix deck_card URLs to use metadata.board_id
- Fix news_item URLs to use external article URL from metadata.url
- Add hover styling for title link and icon

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

third_party/astrolabe/composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "45fea22a5899837fbb1007b2b321a2aa",
+    "content-hash": "9a07fd98e858321235b781204a3de248",
     "packages": [
         {
             "name": "bamarni/composer-bin-plugin",