Fix broken Claude Code documentation links

Update all references from docs.anthropic.com/en/docs/claude-code
to code.claude.com/docs after documentation site migration.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

docs/SETUP_GUIDE.md

@@ -8,7 +8,7 @@ Before starting, ensure you have:
 
 - [ ] **Obsidian** installed ([Download here](https://obsidian.md/))
 - [ ] **Git** installed ([Download here](https://git-scm.com/))
-- [ ] **Claude Code CLI** installed ([Instructions](https://docs.anthropic.com/en/docs/claude-code))
+- [ ] **Claude Code CLI** installed ([Instructions](https://code.claude.com/docs))
 - [ ] **GitHub account** (optional, for sync) ([Sign up](https://github.com))
 - [ ] **Text editor** (for configuration files)
 
@@ -238,7 +238,7 @@ cp github-actions/claude.yml .github/workflows/
 ```
 
 2. Get Claude Code OAuth token:
-   - Visit: https://docs.anthropic.com/en/docs/claude-code/github-actions
+   - Visit: https://code.claude.com/docs/en/github-actions
    - Follow instructions to get token
 
 3. Add token to GitHub:

docs/TROUBLESHOOTING.md

@@ -95,7 +95,7 @@ Common issues and their solutions. If you can't find your issue here, check the
 1. Install Claude Code:
    ```bash
    # Check installation guide
-   # https://docs.anthropic.com/en/docs/claude-code
+   # https://code.claude.com/docs
    ```
 
 2. Add to PATH:
@@ -476,7 +476,7 @@ rm -rf node_modules .obsidian/cache
 
 ### Resources
 - [Obsidian Forum](https://forum.obsidian.md/)
-- [Claude Code Docs](https://docs.anthropic.com/en/docs/claude-code)
+- [Claude Code Docs](https://code.claude.com/docs)
 - [GitHub Issues](https://github.com/ballred/obsidian-claude-pkm/issues)
 
 ### Debug Information