Add vision-driven continuous improvement to product-manager

Transforms the product-manager from a reactive backlog manager into a
vision-driven system with continuous improvement capabilities.

New components:
- vision-management skill: How to create, maintain, and evolve product vision
- /vision command: View, create, or update product vision (syncs to Gitea)
- /improve command: Identify gaps between vision goals and backlog

Enhanced existing components:
- product-manager agent: Now vision-aware with strategic prioritization
- /retro command: Connects learnings back to vision updates
- /plan-issues command: Shows vision alignment for planned work

The vision lives in two places: vision.md (source of truth) and a Gitea
issue labeled "vision" for integration with the issue workflow.

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

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

commands/plan-issues.md

@@ -1,5 +1,5 @@
 ---
-description: Plan and create issues for a feature or improvement. Breaks down work into well-structured issues.
+description: Plan and create issues for a feature or improvement. Breaks down work into well-structured issues with vision alignment.
 argument-hint: <feature-description>
 ---
 
@@ -8,29 +8,41 @@ argument-hint: <feature-description>
 @~/.claude/skills/gitea/SKILL.md
 @~/.claude/skills/roadmap-planning/SKILL.md
 @~/.claude/skills/issue-writing/SKILL.md
+@~/.claude/skills/vision-management/SKILL.md
 
-1. **Understand the feature**: Analyze what "$1" involves
-2. **Explore the codebase** if needed to understand context
-3. **Break down** into discrete, actionable issues:
+1. **Check vision context**: If `vision.md` exists, read it to understand current goals and focus
+2. **Understand the feature**: Analyze what "$1" involves
+3. **Explore the codebase** if needed to understand context
+4. **Break down** into discrete, actionable issues:
    - Each issue should be independently completable
    - Clear dependencies between issues
    - Appropriate scope (not too big, not too small)
 
-4. **Present the plan**:
+5. **Present the plan** (include vision alignment if vision exists):
    ```
    ## Proposed Issues for: $1
 
+   Vision Alignment: Supports [Goal N: description]
+
    1. [Title] - Brief description
       Dependencies: none
+      Supports: Goal N
 
    2. [Title] - Brief description
       Dependencies: #1
+      Supports: Goal N
 
    3. [Title] - Brief description
       Dependencies: #1, #2
+      Supports: Goal N
    ```
 
-5. **Ask for approval** before creating issues
-6. **Create issues** in order
-7. **Update dependencies** with actual issue numbers after creation
-8. **Present summary** with links to created issues
+   If the feature doesn't align with any vision goal, note this and ask if:
+   - The vision should be updated to include this as a goal
+   - This should be added as a non-goal
+   - Proceed anyway (with justification)
+
+6. **Ask for approval** before creating issues
+7. **Create issues** in order
+8. **Update dependencies** with actual issue numbers after creation
+9. **Present summary** with links to created issues