Refactor documentation for code commands and workflows

- Updated command syntax formatting to use code blocks for clarity in `prep.md`, `review.md`, and `spec.md`.
- Enhanced architectural diagrams in `ch01-what-is-claude-dms3.md` and core concepts in `ch03-core-concepts.md` using mermaid syntax for better visualization.
- Improved workflow diagrams in `ch04-workflow-basics.md` and `4-level.md` to provide clearer representations of processes.
- Added troubleshooting section in `installation.md` to address common installation issues and provide quick start examples.
- Revised skill documentation in `claude-meta.md` and `claude-workflow.md` to standardize command triggers and output structures.
- Updated best practices and workflow index documentation to enhance readability and understanding of workflow levels and practices.

docs/features/api-settings.md

@@ -22,8 +22,8 @@
 |---------|------|--------|
 | **Gemini** | Builtin | gemini-2.5-flash, gemini-2.5-pro |
 | **Qwen** | Builtin | coder-model |
-| **Codex** | Builtin | gpt-4o, gpt-4o-mini |
-| **Claude** | Builtin | claude-sonnet, claude-haiku |
+| **Codex** | Builtin | gpt-5.2 |
+| **Claude** | Builtin | sonnet, haiku |
 | **OpenCode** | Builtin | opencode/glm-4.7-free |
 
 ---
@@ -44,7 +44,8 @@
     },
     "codex": {
       "enabled": true,
-      "primaryModel": "gpt-4o",
+      "primaryModel": "gpt-5.2",
+      "secondaryModel": "gpt-5.2",
       "tags": [],
       "type": "builtin"
     }

docs/features/memory.md

@@ -60,7 +60,7 @@ ccw memory search "authentication"
 ## Configuration
 
 ```json
-// ~/.claude/cli-settings.json
+// ~/.claude/settings.json
 {
   "memory": {
     "enabled": true,