Close out fullscreen rule enforcement lane with execution-backed validation evidence.

Record validated fullscreen lock to sample 0713 only.
Apply roadmap status-only progression for the fullscreen lane.
Preserve no-engine-change outcome from validation pass.

PR: BUILD_PR_LEVEL_23_10_FULLSCREEN_RULE_CLOSEOUT_AND_ROADMAP_STATUS

Author: DavidQ

docs/dev/reports/BUILD_PR_LEVEL_23_10_FULLSCREEN_RULE_CLOSEOUT_AND_ROADMAP_STATUS.md

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+# BUILD_PR_LEVEL_23_10_FULLSCREEN_RULE_CLOSEOUT_AND_ROADMAP_STATUS
+
+## Evidence Source
+- `docs/dev/reports/fullscreen_rule_closeout_report.txt`
+
+## Validation Evidence Used
+- Fullscreen sample scan:
+  - `TOTAL_HITS=2`
+  - `OUTSIDE_0713=0`
+  - matches only:
+    - `samples/phase-07/0713/main.js`
+    - `samples/phase-07/0713/FullscreenAbilityScene.js`
+- 0713 scaling checks:
+  - `PASS ./tests/samples/FullscreenRuleEnforcement.test.mjs`
+  - `PASS ./tests/samples/FullscreenAbility0713ViewportFit.test.mjs`
+
+## Roadmap Target
+- `docs/dev/roadmaps/MASTER_ROADMAP_ENGINE.md`
+
+## Status-Only Transition Review
+- Inspected fullscreen-related roadmap lines.
+- No fullscreen closeout marker in pending state (`[ ]` or `[.]`) exists in the master roadmap.
+- Existing fullscreen-related entries are already complete (`[x]`).
+
+## Result
+- No roadmap marker transition was applied in this PR because no eligible fullscreen status markers remained to transition.
+- No engine changes.
+- No sample behavior changes.

docs/dev/reports/fullscreen_rule_closeout_report.txt

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+Fullscreen Rule Closeout Report
+
+Source of truth: execution-backed validation-only pass completed by user.
+
+Results:
+- Fullscreen usage scan across samples/
+  - TOTAL_HITS=2 files
+  - OUTSIDE_0713=0
+  - Matches only in:
+    - samples/phase-07/0713/main.js
+    - samples/phase-07/0713/FullscreenAbilityScene.js
+
+- 0713 scaling verification
+  - PASS ./tests/samples/FullscreenRuleEnforcement.test.mjs
+  - PASS ./tests/samples/FullscreenAbility0713ViewportFit.test.mjs
+
+Conclusion:
+- No fullscreen usage exists outside sample 0713.
+- Sample 0713 fullscreen scaling behavior is validated by focused tests.
+- Closeout may advance using roadmap status-only transitions.

docs/dev/reports/validation_checklist.txt

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 Validation Checklist
 
-[ ] Validation rules defined
-[ ] Violations detectable
-[ ] Sample 0713 validated
-[ ] No false positives
+[x] Fullscreen usage scan completed
+[x] OUTSIDE_0713 = 0
+[x] Only two fullscreen hits remain and both are in sample 0713
+[x] Focused fullscreen enforcement test passed
+[x] Focused 0713 viewport-fit test passed
+[x] No engine changes made in validation-only pass
+[ ] Master roadmap status updated using execution-backed status-only transitions

docs/pr/BUILD_PR_LEVEL_23_10_FULLSCREEN_RULE_CLOSEOUT_AND_ROADMAP_STATUS.md

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+# BUILD_PR_LEVEL_23_10_FULLSCREEN_RULE_CLOSEOUT_AND_ROADMAP_STATUS
+
+## Purpose
+Close out the fullscreen enforcement lane using the completed validation evidence from Level 23.9 and apply only the smallest execution-backed status updates required for roadmap progression.
+
+## Execution Summary
+Validation-only pass completed with no engine changes made.
+
+Reported results:
+- fullscreen usage scan across `samples/`
+  - `TOTAL_HITS=2`
+  - `OUTSIDE_0713=0`
+  - matches only in:
+    - `samples/phase-07/0713/main.js`
+    - `samples/phase-07/0713/FullscreenAbilityScene.js`
+- 0713 scaling verification
+  - `PASS ./tests/samples/FullscreenRuleEnforcement.test.mjs`
+  - `PASS ./tests/samples/FullscreenAbility0713ViewportFit.test.mjs`
+
+## Scope
+- roadmap status-only closeout for the fullscreen rule lane
+- preserve fullscreen lock to sample 0713 only
+- preserve validated 0713 viewport-fit behavior
+- record validation evidence in repo docs
+- no engine changes
+- no gameplay changes
+- no new fullscreen feature work
+
+## Required Changes
+1. Update the single master roadmap using status-only transitions that are directly supported by the completed validation evidence.
+2. Record the validation evidence in `docs/dev/reports`.
+3. Do not rewrite roadmap text.
+4. Do not delete roadmap content.
+5. Do not expand scope beyond fullscreen lane closeout.
+
+## Acceptance
+- roadmap receives status-only updates only
+- fullscreen remains present only in sample 0713
+- validation evidence is stored in repo docs
+- no engine files are changed
+- no non-fullscreen samples gain fullscreen behavior