docs: Release v1.2 - Enhanced workflow diagrams and comprehensive documentation updates

- Add detailed mermaid workflow diagrams in WORKFLOW_DIAGRAMS.md
- Update README.md and README_CN.md with v1.2 features and architecture visualization
- Enhance system architecture diagrams with CLI routing and agent coordination flows
- Document major enhancements since v1.0: task saturation control, Gemini wrapper intelligence
- Add command execution flow diagrams and comprehensive workflow visualizations
- Update CLI guidelines in codex-unified.md and gemini-unified.md with bash() syntax

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

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

.claude/workflows/codex-unified.md

@@ -4,7 +4,7 @@ description: Comprehensive Codex CLI guidelines - core rules, syntax, patterns,
 type: technical-guideline
 ---
 
-### 🚀 Command Overview: `codex`
+### 🚀 Command Overview: Bash(codex *) 
 
 -   **Purpose**: An AI-powered CLI tool for automated codebase analysis, intelligent code generation, and autonomous development workflows.
 -   **Key Characteristic**: **No `--all-files` flag** - requires explicit `@` pattern references for file inclusion.

.claude/workflows/gemini-unified.md

@@ -4,7 +4,7 @@ description: Consolidated Gemini CLI guidelines - core rules, syntax, patterns,
 type: technical-guideline
 ---
 
-### 🚀 Command Overview: `gemini`
+### 🚀 Command Overview: Bash(gemini *)
 
 -   **Purpose**: A CLI tool for comprehensive codebase analysis, context gathering, and pattern detection across multiple files.
 -   **Directory Analysis Rule**: When user intends to analyze specific directory (cd XXX), always navigate first: `cd XXX && gemini  -p "prompt"`