feat: add dynamic pipeline detection for team sessions v5 architecture

Backend:
- Fix readLegacyFiles to handle { name, prefix }[] role format
- Add roles backfill in getEffectiveTeamMeta when meta.json exists
- Ensure pipeline_stages and roles flow correctly to API response

Team Skills:
- Add pipeline metadata initialization to all 16 team skill coordinator roles
- Each skill now reports pipeline_stages and roles to meta.json at session init

Documentation:
- Update command references and component documentation
- Add numerical-analysis-workflow skill spec
- Sync zh/en translations for commands and components

docs/skills/_shared/SKILL-DESIGN-SPEC.md

@@ -0,0 +1,13 @@
+# CCW Skills Design Specification
+
+> **Note**: This document is a placeholder. The full specification is being developed.
+
+## Overview
+
+This document defines the design standards and conventions for CCW skills.
+
+## Related Documents
+
+- [Document Standards](/skills/specs/document-standards)
+- [Quality Gates](/skills/specs/quality-gates)
+- [Reference Docs Spec](/skills/specs/reference-docs-spec)

docs/skills/claude-index.md

@@ -258,7 +258,7 @@ memory/
 
 - [Claude Commands](../commands/claude/)
 - [Codex Skills](./codex-index.md)
-- [Features](../features/)
+- [Features](../features/spec)
 
 ## Statistics
 

docs/skills/claude-meta.md

@@ -230,7 +230,7 @@ Artifacts  N×Role  Synthesis  1×Role
 **Core Specifications** (required):
 | Document | Purpose | Priority |
 |----------|---------|----------|
-| [../_shared/SKILL-DESIGN-SPEC.md](../_shared/SKILL-DESIGN-SPEC.md) | General design spec — Defines structure, naming, quality standards for all Skills | **P0 - Critical** |
+| [_shared/SKILL-DESIGN-SPEC.md](./_shared/SKILL-DESIGN-SPEC.md) | General design spec — Defines structure, naming, quality standards for all Skills | **P0 - Critical** |
 | [specs/reference-docs-spec.md](specs/reference-docs-spec.md) | Reference doc generation spec — Ensures generated Skills have appropriate stage-based reference docs | **P0 - Critical** |
 
 **Template Files** (read before generation):

docs/skills/codex-index.md

@@ -440,7 +440,7 @@ Explore → Document → Log → Analyze → Correct Understanding → Fix → V
 ## Related Documentation
 
 - [Claude Skills](./claude-index.md)
-- [Feature Documentation](../features/)
+- [Feature Documentation](../features/spec)
 
 ## Best Practices