refactor(workflow): rename workflow-lite-plan to workflow-lite-planex and remove standalone lite-execute

- Rename skill directory from workflow-lite-plan to workflow-lite-planex (planex = plan + execute)
- Remove standalone lite-execute command entry from command.json and analyze_commands.py
- Update all 60+ files referencing workflow-lite-plan to use workflow-lite-planex
- Update descriptions to clarify Phase 1: plan → Phase 2: execute architecture
- Remove lite-execute as standalone command from orchestrator routing tables
- Update docs (EN/ZH) to reflect unified planex naming and phase descriptions

.codex/skills/brainstorm-with-file/SKILL.md

@@ -800,7 +800,7 @@ Offer user follow-up actions based on brainstorming results.
 
 | Option | Purpose | Action |
 |--------|---------|--------|
-| **创建实施计划** | Plan implementation of top idea | Launch `workflow-lite-plan` |
+| **创建实施计划** | Plan implementation of top idea | Launch `workflow-lite-planex` |
 | **创建Issue** | Track top ideas for later | Launch `issue:new` with ideas |
 | **深入分析** | Analyze top idea in detail | Launch `workflow:analyze-with-file` |
 | **导出分享** | Generate shareable report | Create formatted report document |

.codex/skills/csv-wave-pipeline/SKILL.md

@@ -903,4 +903,4 @@ Wave 3 agents:
 | Linear pipeline (A→B→C) | `$csv-wave-pipeline -c 1` — 3 waves, serial, full context |
 | Diamond dependency (A→B,C→D) | `$csv-wave-pipeline` — 3 waves, B+C concurrent in wave 2 |
 | Complex requirement, unclear tasks | Use `$roadmap-with-file` first for planning, then feed issues here |
-| Single complex task | Use `$lite-execute` instead |
+| Single complex task | Use `$workflow-lite-planex` instead |

.codex/skills/roadmap-with-file/SKILL.md

@@ -896,4 +896,4 @@ To execute later:
 | Quick task breakdown, immediate execution | `$lite-plan` |
 | Collaborative multi-agent planning | `$collaborative-plan-with-file` |
 | Full specification documents | `$spec-generator` |
-| Code implementation from existing plan | `$lite-execute` |
+| Code implementation from existing plan | `$workflow-lite-planex` |