Add a read-only view of backend/knowledge_base/**.md so the files that get
injected into the system prompt can be inspected from the GUI:
- GET /api/kb/files lists the Markdown files (title, preview, size, mtime and
whether the file is already embedded), GET /api/kb/file returns one in full.
Paths are resolved against the knowledge base directory and rejected unless
they stay inside it and end in .md.
- KnowledgeBasePanel.vue groups the files by folder (collapsible, so web_search
can be folded away), filters by title/path/preview and renders the selected
file with MarkdownContent.
The header had grown to four side panel toggles, so collapse them into one
menu: panels.ts now holds the list of panels along with the component each one
renders, App.vue picks it with <component :is>, and SidePanelMenu.vue shows the
active panel on its button. Re-picking the open panel (or "パネルを閉じる")
closes it; a click outside or Esc closes just the menu.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
colcaroliandClaude Opus 5
f085db421c