docs: sync to Claude Code v2.1.143 (5 patches since v2.1.138)

Bumps tutorial coverage from v2.1.138 → v2.1.143. Highlights:

- /goal and /scroll-speed slash commands (v2.1.139)
- claude agents Agent View (Research Preview) with 9 dispatch flags
- claude plugin details and marketplace context-cost projection
- Hook exec form (args), continueOnBlock on PostToolUse, terminalSequence
- Stop hook 8-block safety cap + override env var
- Fast Mode default flipped to Opus 4.7 (v2.1.142)
- PowerShell tool default-on for Bedrock/Vertex/Foundry on Windows
- API-key auth disables Remote Control, /schedule, claude.ai MCP, notifications
- worktree.bgIsolation setting
- CLAUDE_PROJECT_DIR for MCP stdio servers
- Subagent OTEL headers + case-insensitive subagent_type matching
- Root-level SKILL.md plugin pattern; Routines marketing name note

Also bumps stale "28 hook events" counts in CATALOG/README to 29 and
refreshes the metadata footer (Last Updated, Claude Code Version,
Sources) on every modified file.

CATALOG.md

@@ -20,7 +20,7 @@
 | **Skills** | 5 bundled | 6 | 11 | [03-skills/](03-skills/) |
 | **Plugins** | - | 3 | 3 | [07-plugins/](07-plugins/) |
 | **MCP Servers** | 1 | 8 | 9 | [05-mcp/](05-mcp/) |
-| **Hooks** | 28 events | 8 | 8 | [06-hooks/](06-hooks/) |
+| **Hooks** | 29 events | 8 | 8 | [06-hooks/](06-hooks/) |
 | **Memory** | 7 types | 3 | 3 | [02-memory/](02-memory/) |
 | **Total** | **99** | **47** | **121** | |
 
@@ -530,11 +530,12 @@ chmod +x ~/.claude/hooks/*.sh
 
 ---
 
-**Last Updated**: May 9, 2026
-**Claude Code Version**: 2.1.138
+**Last Updated**: May 19, 2026
+**Claude Code Version**: 2.1.143
 **Sources**:
 - https://code.claude.com/docs/en/overview
 - https://code.claude.com/docs/en/commands
 - https://code.claude.com/docs/en/hooks
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.138
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.143
 **Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5