docs: sync to Claude Code v2.1.110 (TUI, push notifications, session recap) (#80)

* docs: sync to Claude Code v2.1.110 with TUI, push notifications, session recap, and new commands

- 01-slash-commands: add /tui, /focus, /recap, /undo, /proactive to command table and recent changes
- 07-plugins: document monitors manifest key for background monitor support (v2.1.105)
- 09-advanced-features: add TUI mode, push notifications, session recap, ENABLE_PROMPT_CACHING_1H
- 10-cli: add --exclude-dynamic-system-prompt-sections flag and CLAUDE_CODE_PERFORCE_MODE env var
- CATALOG.md: update command counts (55+→60+, 63+→68+), add 5 new command rows
- All 12 files: bump footer to April 16, 2026 / Claude Code Version 2.1.110

* fix(catalog): correct version tags for /proactive, /recap, /undo commands

/proactive was added in v2.1.105, /recap and /undo in v2.1.108 — not v2.1.110.
Only /tui and /focus were introduced in v2.1.110.

01-slash-commands/README.md

@@ -43,6 +43,7 @@ Built-in commands are shortcuts for common actions. There are **60+ built-in com
 | `/extra-usage` | Configure extra usage for rate limits |
 | `/fast [on\|off]` | Toggle fast mode |
 | `/feedback` | Submit feedback (alias: `/bug`) |
+| `/focus` | Toggle focus view (added v2.1.110; replaces `Ctrl+O` for focus toggle) |
 | `/help` | Show help |
 | `/hooks` | View hook configurations |
 | `/ide` | Manage IDE integrations |
@@ -61,9 +62,11 @@ Built-in commands are shortcuts for common actions. There are **60+ built-in com
 | `/permissions` | View/update permissions (alias: `/allowed-tools`) |
 | `/plan [description]` | Enter plan mode |
 | `/plugin` | Manage plugins |
+| `/proactive` | Alias for `/loop` (added v2.1.105) |
 | `/powerup` | Discover features through interactive lessons with animated demos |
 | `/privacy-settings` | Privacy settings (Pro/Max only) |
 | `/release-notes` | View changelog |
+| `/recap` | Show session recap / summary when returning to a session (added v2.1.108) |
 | `/reload-plugins` | Reload active plugins |
 | `/remote-control` | Remote control from claude.ai (alias: `/rc`) |
 | `/remote-env` | Configure default remote environment |
@@ -83,7 +86,9 @@ Built-in commands are shortcuts for common actions. There are **60+ built-in com
 | `/team-onboarding` | Generate a teammate ramp-up guide from the project's Claude Code setup (new in v2.1.101) |
 | `/terminal-setup` | Configure terminal keybindings |
 | `/theme` | Change color theme |
+| `/tui` | Toggle fullscreen TUI (text user interface) mode with flicker-free rendering (added v2.1.110) |
 | `/ultraplan <prompt>` | Draft plan in ultraplan session, review in browser |
+| `/undo` | Alias for `/rewind` (added v2.1.108) |
 | `/upgrade` | Open upgrade page for higher plan tier |
 | `/usage` | Show plan usage limits and rate limit status |
 | `/voice` | Toggle push-to-talk voice dictation |
@@ -128,6 +133,11 @@ These skills ship with Claude Code and are invoked like slash commands:
 - `/resume` supports `/continue` alias
 - MCP prompts are available as `/mcp__<server>__<prompt>` commands (see [MCP Prompts as Commands](#mcp-prompts-as-commands))
 - `/team-onboarding` added for auto-generating teammate ramp-up guides (v2.1.101)
+- `/tui` command added for flicker-free fullscreen TUI rendering (v2.1.110)
+- `/focus` command added for focus view toggle; `Ctrl+O` now only toggles verbose transcript (v2.1.110)
+- `/recap` command added to manually trigger session context recap (v2.1.108)
+- `/undo` added as alias for `/rewind` (v2.1.108)
+- `/proactive` added as alias for `/loop` (v2.1.105)
 
 ### `/team-onboarding` — Teammate Ramp-Up Guide
 
@@ -584,8 +594,8 @@ If both exist with the same name, the **skill takes precedence**. Remove one or
 - [CLI Reference](https://code.claude.com/docs/en/cli-reference) - Command-line options
 
 ---
-**Last Updated**: April 11, 2026
-**Claude Code Version**: 2.1.101
+**Last Updated**: April 16, 2026
+**Claude Code Version**: 2.1.110
 **Sources**:
 - https://code.claude.com/docs/en/skills
 - https://code.claude.com/docs/en/commands