feat: Review Readiness Dashboard + gstack-slug helper (v0.5.1) (#130)

* feat: add bin/gstack-slug helper + migrate all inline SLUG computation

Extract the opaque SLUG sed pipeline into a shared 5-line shell script.
Replace 8 inline copies across templates with eval $(gstack-slug).
Sanitizes branch names (/ → -) to prevent subdirectory creation.

* feat: review readiness dashboard — track CEO/Eng/Design reviews per branch

Each review skill logs its result to JSONL. A shared {{REVIEW_DASHBOARD}}
placeholder displays run counts, timestamps, and a CLEARED TO SHIP verdict.
/ship pre-flight reads the dashboard and prompts when reviews are missing.

* chore: bump version and changelog (v0.5.1)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

design-consultation/SKILL.md

@@ -114,7 +114,7 @@ ls src/ app/ pages/ components/ 2>/dev/null | head -30
 Look for brainstorm output:
 
 ```bash
-SLUG=$(git remote get-url origin 2>/dev/null | sed 's|.*[:/]\([^/]*/[^/]*\)\.git$|\1|;s|.*[:/]\([^/]*/[^/]*\)$|\1|' | tr '/' '-')
+eval $(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)
 ls ~/.gstack/projects/$SLUG/*brainstorm* 2>/dev/null | head -5
 ls .context/*brainstorm* .context/attachments/*brainstorm* 2>/dev/null | head -5
 ```

design-consultation/SKILL.md.tmpl

@@ -49,7 +49,7 @@ ls src/ app/ pages/ components/ 2>/dev/null | head -30
 Look for brainstorm output:
 
 ```bash
-SLUG=$(git remote get-url origin 2>/dev/null | sed 's|.*[:/]\([^/]*/[^/]*\)\.git$|\1|;s|.*[:/]\([^/]*/[^/]*\)$|\1|' | tr '/' '-')
+eval $(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)
 ls ~/.gstack/projects/$SLUG/*brainstorm* 2>/dev/null | head -5
 ls .context/*brainstorm* .context/attachments/*brainstorm* 2>/dev/null | head -5
 ```