merge: incorporate origin/main into community-mode branch

Conflicts resolved:
- VERSION: keep 0.14.0.0 (our branch > main's 0.13.6.0)
- CHANGELOG.md: keep both entries, 0.14.0.0 above 0.13.6.0
- package.json: keep 0.14.0.0

Main brought in v0.13.6.0 "GStack Learns": project learnings system
with confidence calibration, /learn skill, cross-project discovery,
confidence decay, learnings count in preamble.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ship/SKILL.md.tmpl

@@ -228,6 +228,8 @@ If multiple suites need to run, run them sequentially (each needs a test lane).
 
 {{PLAN_VERIFICATION_EXEC}}
 
+{{LEARNINGS_SEARCH}}
+
 ---
 
 ## Step 3.5: Pre-Landing Review
@@ -242,6 +244,8 @@ Review the diff for structural issues that tests don't catch.
    - **Pass 1 (CRITICAL):** SQL & Data Safety, LLM Output Trust Boundary
    - **Pass 2 (INFORMATIONAL):** All remaining categories
 
+{{CONFIDENCE_CALIBRATION}}
+
 {{DESIGN_REVIEW_LITE}}
 
    Include any design findings alongside the code review findings. They follow the same Fix-First flow below.
@@ -318,6 +322,8 @@ For each classified comment:
 
 {{ADVERSARIAL_STEP}}
 
+{{LEARNINGS_LOG}}
+
 ## Step 4: Version bump (auto-decide)
 
 1. Read the current `VERSION` file (4-digit format: `MAJOR.MINOR.PATCH.MICRO`)