feat: add generated scene skill platform hardening

docs/superpowers/reports/2026-04-19-g2-remaining-fail-closed-closure-report.md

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+# G2 Remaining Fail-Closed Closure Report
+
+Date: 2026-04-19
+
+Parent framework: `2026-04-19-scene-skill-102-full-coverage-framework-plan`
+
+Parent route: `Route 3 / G2 multi_mode_request closure`
+
+Plan: `2026-04-19-g2-remaining-fail-closed-closure-plan.md`
+
+## Scope
+
+This report closes the fixed Route 3 bucket:
+
+- `multi_mode_request` structured fail-closed scenes: `4`
+- Primary blocker: `g2_request_contract` / `request_mode_contract`
+- Allowed implementation area: bounded G2 mode request contract closure
+
+This run did not update `scene_execution_board_2026-04-18.json`, did not create a new family, and did not begin Route 4.
+
+## Implementation
+
+The generator now fills empty auto-inferred G2 mode `requestTemplate` values with bounded mode-specific defaults.
+
+Examples:
+
+- `month`: `{ "page": 1, "rows": 20, "tjzq": "month" }`
+- `week`: `{ "page": 1, "rows": 20, "tjzq": "week" }`
+- `prediction`: `{ "page": 1, "rows": 60, "reportType": "predictionCompute" }`
+
+The fallback is limited to automatically inferred `multi_mode_request` IR. Explicitly provided incomplete `scene_ir_json` remains fail-closed.
+
+## Results
+
+| Scene ID | Scene | Baseline | Follow-up | Result |
+| --- | --- | --- | --- | --- |
+| `sweep-020-scene` | `供电所线路电量统计` | `C / fail-closed` | `A / auto-pass` | resolved |
+| `sweep-023-scene` | `供电质量看板-武威` | `C / fail-closed` | `A / auto-pass` | resolved |
+| `sweep-070-scene` | `电量、站损自动采集上报` | `C / fail-closed` | `A / auto-pass` | resolved |
+| `sweep-083-scene` | `营销业务管控监测日报表` | `C / fail-closed` | `A / auto-pass` | resolved |
+
+Summary:
+
+- Before: `4` G2 structured fail-closed scenes
+- Resolved to auto-pass: `4`
+- Remaining Route 3 fail-closed: `0`
+- Route-local coverage delta: `+4`
+
+## Verification
+
+Commands:
+
+```powershell
+cargo test --test scene_generator_test generator_fills_empty_g2_mode_request_templates -- --nocapture
+cargo test --test scene_generator_test generator_blocks_incomplete_multi_mode_contract -- --nocapture
+```
+
+Route-local rerun output:
+
+```text
+examples/g2_remaining_fail_closed_closure_followup_2026-04-19
+```
+
+## Stop Statement
+
+Route 3 is closed. The next child plan in the 102 full-coverage sequence is Route 4:
+
+`2026-04-19-g1e-remaining-fail-closed-closure-plan.md`