fix(25): revise plan based on checker feedback

- Added Task 3 to create 25-UAT.md (requirement_coverage blocker)
- Renumbered checkpoint task from 3 to 4
- Simplified key_links[0] pattern to 'delete window\.JK' (warning fix)

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

.planning/phases/25-memory-leak-audit/25-01-PLAN.md

@@ -29,7 +29,7 @@ must_haves:
     - from: "jam-ui/src/hooks/useRecordingHelpers.js"
       to: "window.JK.*"
       via: "useEffect cleanup function"
-      pattern: "return \\(\\) => \\{[\\s\\S]*delete window\\.JK"
+      pattern: "delete window\\.JK"
     - from: "jam-ui/src/hooks/useRecordingHelpers.js"
       to: "waitingOnStopTimer"
       via: "useEffect cleanup function"
@@ -242,8 +242,80 @@ useEffect(() => {
   </done>
 </task>
 
+<task type="auto">
+  <name>Task 3: Create UAT checklist for memory verification</name>
+  <files>.planning/phases/25-memory-leak-audit/25-UAT.md</files>
+  <action>
+Create a comprehensive UAT checklist following the Phase 23 pattern. Include:
+
+**Frontmatter:**
+```yaml
+---
+phase: 25-memory-leak-audit
+type: uat
+status: pending
+verified-by:
+verified-date:
+---
+```
+
+**Sections to include:**
+
+1. **Prerequisites** - Chrome DevTools, jam-ui running, native client connected
+
+2. **Quick Verification (2-3 minutes)** - Open/close recording modal 5 times, check for console warnings
+
+3. **Section 1: Timer Cleanup Verification**
+   - Purpose: Verify waitingOnStopTimer is cleared on unmount
+   - Test steps: Start recording, stop recording, leave session
+   - Expected: No timer-related errors
+
+4. **Section 2: Callback Cleanup Verification**
+   - Purpose: Verify window.JK callbacks don't accumulate
+   - Test steps: Open/close recording modal 20 times, check window.JK
+   - Expected: Same callback names, no duplicates
+
+5. **Section 3: Async Operation Cleanup Verification**
+   - Purpose: Verify no "state update on unmounted component" warnings
+   - Test steps: Open recording modal, quickly close before load completes
+   - Expected: No console warnings
+
+6. **Section 4: 15-Minute Idle Test**
+   - Purpose: Verify modal can stay open without memory growth
+   - Test steps: Open modal, leave open 15+ minutes, measure heap
+   - Expected: < 50% growth
+
+7. **Section 5: 15-Minute Active Recording Test**
+   - Purpose: Verify active recording doesn't leak memory
+   - Test steps: Start recording, continue 15+ minutes, measure heap
+   - Expected: < 50% growth, no freezes
+
+8. **Verification Results Summary** - Table with all sections
+
+9. **Troubleshooting** - Common issues and how to investigate
+
+Follow exact format from Phase 23 UAT.md including:
+- Checkbox format for test steps
+- Expected/Actual result tables
+- Notes sections
+- Footer with template version
+  </action>
+  <verify>
+1. File exists at .planning/phases/25-memory-leak-audit/25-UAT.md
+2. File has > 100 lines
+3. Contains all 5 main test sections
+4. Contains frontmatter with status: pending
+5. Contains troubleshooting section
+  </verify>
+  <done>
+- 25-UAT.md created with comprehensive verification checklist
+- All test scenarios from CONTEXT.md covered (idle 15min, active recording 15min)
+- Format matches Phase 23 UAT.md pattern
+  </done>
+</task>
+
 <task type="checkpoint:human-verify" gate="blocking">
-  <name>Task 3: Verify memory stability with UAT checklist</name>
+  <name>Task 4: Verify memory stability with UAT checklist</name>
   <what-built>
 Memory leak fixes in recording-related components:
 1. Timer cleanup on unmount in useRecordingHelpers.js
@@ -295,6 +367,10 @@ Memory leak fixes in recording-related components:
 - useRecordingHelpers.js contains cleanup useEffect for callbacks
 - JKSessionRecordingModal.js contains ignore flag pattern in both useEffect hooks
 
+**UAT File Verification:**
+- 25-UAT.md exists with 100+ lines
+- Contains all required test sections
+
 **Manual Verification (UAT):**
 - Human verifies no console warnings during modal open/close
 - Human verifies memory stability during 15+ minute test
@@ -307,6 +383,7 @@ Memory leak fixes in recording-related components:
 3. MEM-03: Recording modal can remain open 15+ minutes without memory growth
 4. No "state update on unmounted component" console warnings
 5. Callbacks in window.JK don't accumulate across modal open/close cycles
+6. 25-UAT.md created with comprehensive verification checklist
 </success_criteria>
 
 <output>