Polish project report artifact

docs/CODEX_EXECUTION_LOG.md

@@ -2489,3 +2489,30 @@ Limitations:
 
 Next recommended pass:
 - Run a live browser smoke across Exports and Overview after deployment, then continue with report artifact readability if the exported HTML itself needs visual polish.
+
+## Sprint 65 Project report readability polish (2026-06-18)
+
+Changed:
+- Reworked the lightweight `project_report_html` renderer into a self-contained handoff layout with hero, readiness pill, scorecards and sectioned report content.
+- Added print-friendly CSS and scroll-safe table wrappers to the HTML artifact.
+- Added source and CRS columns to the dataset inventory section.
+- Preserved existing export type, endpoint behavior, download behavior and storage flow.
+- Added `backend/tests/test_sprint65_project_report_polish.py`.
+- Updated `backend/README.md`, `docs/TODO.md` and `CHANGELOG.md`.
+
+Tested:
+- Red step: `python -m pytest backend/tests/test_sprint65_project_report_polish.py -q` failed on missing report shell, scorecards, print styles and readiness pill classes.
+- `python -m pytest backend/tests/test_sprint65_project_report_polish.py backend/tests/test_sprint17_export_foundation.py -q` (`12 passed`)
+- `python -m compileall backend/app`
+- `cd frontend && npm run typecheck`
+- `cd frontend && npm run build`
+- `bash scripts/run_readiness_check.sh` (`235 passed`)
+
+Open:
+- Run full readiness, deploy Tower and smoke the HTML report download visually.
+
+Limitations:
+- This remains a lightweight HTML handoff artifact. It does not add PDF generation, a report designer, new endpoints, live provider fetching or AI/model behavior.
+
+Next recommended pass:
+- Verify the generated report artifact through the live export workflow, then continue with a full-workspace browser smoke if the runtime stays green.

docs/TODO.md

@@ -337,3 +337,4 @@ This file now starts with the current implementation status. Older preparation/b
 - [x] Add workbench visual polish pass for command bar, panel surfaces, empty states and mobile nav density.
 - [x] Add map/result overlay ergonomics for active layer provenance and feature property summaries.
 - [x] Add export/report handoff polish for artifact readiness, action grouping and export provenance.
+- [x] Polish lightweight HTML project report readability, print styling and handoff sections.