refactor(qa): /qa and /qa-only drive Aside, fall back to $B

QA_METHODOLOGY runs every phase as Aside scripts (orient, explore, document, re-test, mobile viewport via CDP emulation, links via HEAD fetch); the authenticate phase is 'you are already signed in'; a 13th rule requires consent before mutating actions on non-local targets; the fallback section translates each step onto $B. The qa E2E tests run on whichever engine is present.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

qa/templates/qa-report-template.md

@@ -64,11 +64,10 @@
 **Repro Steps:**
 
 1. Navigate to {URL}
-   ![Step 1](screenshots/issue-001-step-1.png)
+   ![Step 1](screenshots/issue-001-step-1.jpg)
 2. {Action}
-   ![Step 2](screenshots/issue-001-step-2.png)
 3. **Observe:** {what goes wrong}
-   ![Result](screenshots/issue-001-result.png)
+   ![Result](screenshots/issue-001-result.jpg)
 
 ---
 
@@ -81,8 +80,8 @@
 ### Before/After Evidence
 
 #### ISSUE-NNN: {title}
-**Before:** ![Before](screenshots/issue-NNN-before.png)
-**After:** ![After](screenshots/issue-NNN-after.png)
+**Before:** ![Before](screenshots/issue-NNN-result.jpg) — the Phase 5 evidence (`issue-NNN.png` for a static bug)
+**After:** ![After](screenshots/issue-NNN-after.jpg)
 
 ---