Add map area selection extraction

docs/API_CONTRACTS.md

@@ -357,6 +357,55 @@ Return vector stats (feature counts and geometry summary).
 
 Return vector bounds and feature count.
 
+### POST `/api/v1/projects/{project_id}/datasets/{dataset_id}/vector/select`
+
+Read-only spatial selection over persisted `vector_features`.
+
+Request:
+
+```json
+{
+  "bbox": {
+    "min_x": 5.0,
+    "min_y": 51.0,
+    "max_x": 5.1,
+    "max_y": 51.1,
+    "crs": "EPSG:4326"
+  },
+  "limit": 250
+}
+```
+
+Response:
+
+```json
+{
+  "data": {
+    "selection_bbox": {
+      "min_x": 5.0,
+      "min_y": 51.0,
+      "max_x": 5.1,
+      "max_y": 51.1,
+      "crs": "EPSG:4326"
+    },
+    "feature_count": 2,
+    "limit": 250,
+    "truncated": false,
+    "geojson": {
+      "type": "FeatureCollection",
+      "features": []
+    }
+  }
+}
+```
+
+Rules:
+
+- Only vector/GeoJSON datasets are supported.
+- Coordinates are EPSG:4326 longitude/latitude.
+- Results are generated from persisted PostGIS `vector_features`, not from client-side map data.
+- The response is capped by `limit` and returns `truncated=true` when more matching rows exist.
+
 ### GET `/api/v1/projects/{project_id}/datasets/{dataset_id}/content`
 
 Returns stored vector dataset content through the canonical API envelope.

docs/CODEX_EXECUTION_LOG.md

@@ -1,3 +1,35 @@
+## Sprint 106 Map area selection extract (2026-06-25)
+
+Changed:
+- Added `POST /api/v1/projects/{project_id}/datasets/{dataset_id}/vector/select` for read-only bbox selection over persisted PostGIS `vector_features`.
+- Added `VectorSelectionBBox`, `VectorSelectionRequest` and `VectorSelectionResponse` schemas and exported them through the backend schema module.
+- Added `VectorFeatureService.select_features_by_bbox`, including EPSG:4326 bbox validation, feature limit capping, PostGIS `ST_Intersects` query and GeoJSON FeatureCollection conversion from persisted geometries.
+- Added frontend `selectVectorFeatures` API client support and `useMapSelectionExtract`.
+- Extended the Map workspace with an `Area selection` panel, two-click map bbox selection, manual bbox inputs, selected-feature/AOI/active-layer bbox shortcuts, area GeoJSON download/copy actions and a compact selected-feature table.
+- Extended `GeoMap` with `selection-bbox` and `selection-result` MapLibre GeoJSON overlays.
+- Updated `docs/API_CONTRACTS.md`, `frontend/README.md`, `backend/README.md`, `CHANGELOG.md` and `docs/TODO.md`.
+- Added regression coverage in `backend/tests/test_sprint106_map_bbox_extract.py`.
+
+Validation:
+- RED: `python -m pytest backend\tests\test_sprint106_map_bbox_extract.py -q` failed before implementation because the vector selection service, route and frontend contracts were absent.
+- `python -m pytest backend\tests\test_sprint106_map_bbox_extract.py -q` passed: 5 tests.
+- `python -m compileall backend/app` passed.
+- `cd backend && python -m pytest -q` passed: 338 tests.
+- `cd frontend && npm run typecheck` passed.
+- `cd frontend && npm run build` passed.
+- `bash scripts/run_readiness_check.sh` passed.
+- `cd backend && python -m alembic heads` passed: `202606120900 (head)`.
+- `cd backend && python -m alembic upgrade head --sql` passed.
+- `bash -n scripts/live_migration_smoke.sh` passed.
+
+Limitations:
+- Selection shape is bbox-only in EPSG:4326. Polygon/lasso selection remains future work.
+- The endpoint is read-only and does not create exports or derived datasets; operators can download the selected GeoJSON client-side.
+- No migrations, live provider fetching, AI dependency, real model behavior or new product domain were added.
+
+Next recommended pass:
+- Add a browser/live smoke around the area selection panel after deploy, then consider export-center handoff for persisted selection artifacts if V1 needs server-side audit retention.
+
 ## Sprint 105 Map feature extract (2026-06-25)
 
 Changed:

docs/TODO.md

@@ -372,3 +372,4 @@ This file now starts with the current implementation status. Older preparation/b
 - [x] Make raster tile handoff to Detection Lab auto-select the configured YOLO run form.
 - [x] Add AI Lab run-readiness checks for Detection and Segmentation before job submission.
 - [x] Add AI Lab action guardrails so explicit fixture models are not exposed as normal operator runs.
+- [x] Add persisted vector area selection from the Map workspace with bbox extract and GeoJSON download.