feat: 8 AI providers, rich text editor, agent notifications, UI contrast & font settings

- Add DeepSeek, OpenRouter, Mistral, Z.AI, LM Studio as AI providers
  with editable model names via Combobox in admin settings
- Fix OpenRouter broken by normalizeProvider bug in config.ts
- Convert agent-created notes from Markdown to HTML (TipTap rich text)
- Add Notification model + in-app notifications for agent results
- Agent notification click opens the created note directly
- Add note count display on notebook and inbox headers
- Fix checklist toggle in card view (persist state via localCheckItems)
- Add checklist creation option in tabs/list view (dropdown on + button)
- Fix image description ENOENT error with HTTP fallback
- Improve UI contrast across all themes (input, border, checkbox visibility)
- Add font family setting (Inter vs System Default) in Appearance settings
- Fix CSS font-sans variable conflict (removed dead Geist references)
- Update README with new features and 8 providers

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

.claude/settings.local.json

@@ -9,7 +9,22 @@
       "Bash(npm ls *)",
       "mcp__zread__get_repo_structure",
       "Bash(npm install *)",
-      "Bash(docker exec *)"
+      "Bash(docker exec *)",
+      "Bash(chmod:*)",
+      "Bash(ls:*)",
+      "Bash(echo:*)",
+      "Bash(npx tsc:*)",
+      "Bash(./node_modules/.bin/tsc:*)",
+      "Bash(git status:*)",
+      "Bash(docker compose exec:*)",
+      "Bash(node:*)",
+      "Bash(npm uninstall:*)",
+      "Bash(npx prisma migrate dev:*)",
+      "Bash(for f in /Users/sepehr/dev/Momento/memento-note/locales/*.json)",
+      "Bash(do python3 -c \"import json; json.load\\(open\\(''$f''\\)\\)\")",
+      "Bash(done)",
+      "Bash(npx prisma generate)",
+      "Bash(git add:*)"
     ]
   }
 }