docs: tick v1.6.0 Context library checkbox + add changelog entry

Author: unbug

README.md

@@ -703,7 +703,7 @@ Allow users to attach reusable text and code snippets to any session.
 Snippets are injected into the system prompt before each turn, giving
 the model persistent context without requiring full RAG.
 
-- [ ] **Context library** — Create, name, and organize text/code snippets;
+- [x] **Context library** — Create, name, and organize text/code snippets;
       each snippet has a title, content (markdown), and optional category tag
 - [ ] **Session context attachment** — Attach one or more snippets to a session;
       attached snippets appear as a collapsible context block in the chat header

src/lib/changelog.ts

@@ -10,6 +10,22 @@ export interface ChangelogEntry {
 }
 
 export const CHANGELOG: ChangelogEntry[] = [
+  {
+    version: '1.6.0',
+    date: '2026-05-13',
+    title: 'Context Library — Reusable Text/Code Snippets',
+    description:
+      'Users can now create, name, and organize reusable text and code snippets in a dedicated library. Snippets support category tags (code, text, template, reference, custom), search, and one-click insert to clipboard — giving the model persistent context without requiring full RAG.',
+    changes: [
+      { type: 'added', text: 'SnippetLibrary component — create, edit, delete, search, and filter snippets by category' },
+      { type: 'added', text: 'IndexedDB store with migration v24→v25 — persistent snippet storage' },
+      { type: 'added', text: 'Sidebar nav button — quick access to the context library' },
+      { type: 'added', text: 'Command palette entry (⌘K) — search and open the context library' },
+      { type: 'added', text: 'Category system — code, text, template, reference, custom with color-coded icons' },
+      { type: 'added', text: 'en/zh translations for all snippet library strings' },
+      { type: 'added', text: 'Dark terminal-style CSS + light theme overrides for snippet cards, filters, and edit form' },
+    ],
+  },
   {
     version: '1.4.0',
     date: '2026-05-13',