feat(story-2.3): implement home marker and airspace outline rendering

Adds draw_home_marker() in overlay.py (red cross at projected home
position) and draw_airspace() in airspace.py (GeoJSON Polygon
boundaries in blue, graceful FileNotFoundError handling). Includes
airspace fixture and three tests covering all acceptance criteria.
All 70 tests pass; ruff check and format clean.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

_bmad-output/implementation-artifacts/2-3-home-marker-and-airspace-outlines.md

@@ -1,6 +1,6 @@
 # Story 2.3: Home Marker & Airspace Outlines
 
-Status: ready-for-dev
+Status: review
 
 ## Story
 
@@ -18,35 +18,35 @@ AC3: **Given** `airspace.geojson` does not exist at `AIRSPACE_PATH` **When** air
 
 ## Tasks / Subtasks
 
-- [ ] Task 1: Implement `draw_home_marker(image, bounds)` in `src/planemapper/renderer/overlay.py` (AC: #1)
-  - [ ] 1.1 New file; imports: `from PIL import Image, ImageDraw`; `from planemapper.constants import COLOUR_HOME_MARKER`; `from planemapper.renderer.projection import MapBounds, project`
-  - [ ] 1.2 Signature: `def draw_home_marker(image: Image.Image, bounds: MapBounds) -> None:`
-  - [ ] 1.3 Project `(bounds.home_lat, bounds.home_lon)` to `(cx, cy)`
-  - [ ] 1.4 Draw cross: horizontal line `(cx-10, cy)` to `(cx+10, cy)`, vertical line `(cx, cy-10)` to `(cx, cy+10)`, fill `COLOUR_HOME_MARKER`, width 3
-  - [ ] 1.5 Use `ImageDraw.Draw(image).line(...)`
+- [x] Task 1: Implement `draw_home_marker(image, bounds)` in `src/planemapper/renderer/overlay.py` (AC: #1)
+  - [x] 1.1 New file; imports: `from PIL import Image, ImageDraw`; `from planemapper.constants import COLOUR_HOME_MARKER`; `from planemapper.renderer.projection import MapBounds, project`
+  - [x] 1.2 Signature: `def draw_home_marker(image: Image.Image, bounds: MapBounds) -> None:`
+  - [x] 1.3 Project `(bounds.home_lat, bounds.home_lon)` to `(cx, cy)`
+  - [x] 1.4 Draw cross: horizontal line `(cx-10, cy)` to `(cx+10, cy)`, vertical line `(cx, cy-10)` to `(cx, cy+10)`, fill `COLOUR_HOME_MARKER`, width 3
+  - [x] 1.5 Use `ImageDraw.Draw(image).line(...)`
 
-- [ ] Task 2: Implement `draw_airspace(image, bounds)` in `src/planemapper/renderer/airspace.py` (AC: #2, #3)
-  - [ ] 2.1 Replace `# stub` with full implementation
-  - [ ] 2.2 Imports: `import json`, `import logging`; `from PIL import Image, ImageDraw`; `from planemapper.constants import AIRSPACE_PATH, COLOUR_AIRSPACE`; `from planemapper.renderer.projection import MapBounds, project`
-  - [ ] 2.3 `log = logging.getLogger(__name__)`
-  - [ ] 2.4 Try to open `AIRSPACE_PATH`; on `FileNotFoundError`: `log.warning("airspace.geojson not found")` and return
-  - [ ] 2.5 Parse JSON, iterate `data["features"]`
-  - [ ] 2.6 For each feature with `geometry["type"] == "Polygon"`: get `coords = feature["geometry"]["coordinates"][0]`
-  - [ ] 2.7 Reverse GeoJSON `[lon, lat]` → `(lat, lon)` at parse boundary: `points = [project(lat, lon, bounds) for lon, lat in coords]`
-  - [ ] 2.8 Draw with `ImageDraw.Draw(image).line(points, fill=COLOUR_AIRSPACE, width=2)`; skip features with fewer than 2 points
+- [x] Task 2: Implement `draw_airspace(image, bounds)` in `src/planemapper/renderer/airspace.py` (AC: #2, #3)
+  - [x] 2.1 Replace `# stub` with full implementation
+  - [x] 2.2 Imports: `import json`, `import logging`; `from PIL import Image, ImageDraw`; `from planemapper.constants import AIRSPACE_PATH, COLOUR_AIRSPACE`; `from planemapper.renderer.projection import MapBounds, project`
+  - [x] 2.3 `log = logging.getLogger(__name__)`
+  - [x] 2.4 Try to open `AIRSPACE_PATH`; on `FileNotFoundError`: `log.warning("airspace.geojson not found")` and return
+  - [x] 2.5 Parse JSON, iterate `data["features"]`
+  - [x] 2.6 For each feature with `geometry["type"] == "Polygon"`: get `coords = feature["geometry"]["coordinates"][0]`
+  - [x] 2.7 Reverse GeoJSON `[lon, lat]` → `(lat, lon)` at parse boundary: `points = [project(lat, lon, bounds) for lon, lat in coords]`
+  - [x] 2.8 Draw with `ImageDraw.Draw(image).line(points, fill=COLOUR_AIRSPACE, width=2)`; skip features with fewer than 2 points
 
-- [ ] Task 3: Update `tests/fixtures/airspace_sample.geojson` with a sample polygon (AC: #2)
-  - [ ] 3.1 Replace empty features list with one `Polygon` feature having 5 `[lon, lat]` coordinate pairs forming a closed ring near lat=53, lon=-6
+- [x] Task 3: Update `tests/fixtures/airspace_sample.geojson` with a sample polygon (AC: #2)
+  - [x] 3.1 Replace empty features list with one `Polygon` feature having 5 `[lon, lat]` coordinate pairs forming a closed ring near lat=53, lon=-6
 
-- [ ] Task 4: Write tests in `tests/test_airspace.py` (AC: #1, #2, #3)
-  - [ ] 4.1 Test AC1 (home marker): Create 800×480 white RGB image, create `MapBounds(53.0, -6.0, 100.0)`, call `draw_home_marker(image, bounds)`, assert pixel at (400, 240) is red
-  - [ ] 4.2 Test AC2 (airspace drawn): Monkeypatch `AIRSPACE_PATH` to `tests/fixtures/airspace_sample.geojson` path, create image, call `draw_airspace(image, bounds)`, assert no exception raised and function returns normally (drawing occurred without crash)
-  - [ ] 4.3 Test AC3 (missing geojson): Monkeypatch `AIRSPACE_PATH` to a nonexistent path, call `draw_airspace(image, bounds)`, assert no exception raised
+- [x] Task 4: Write tests in `tests/test_airspace.py` (AC: #1, #2, #3)
+  - [x] 4.1 Test AC1 (home marker): Create 800×480 white RGB image, create `MapBounds(53.0, -6.0, 100.0)`, call `draw_home_marker(image, bounds)`, assert pixel at (400, 240) is red
+  - [x] 4.2 Test AC2 (airspace drawn): Monkeypatch `AIRSPACE_PATH` to `tests/fixtures/airspace_sample.geojson` path, create image, call `draw_airspace(image, bounds)`, assert no exception raised and function returns normally (drawing occurred without crash)
+  - [x] 4.3 Test AC3 (missing geojson): Monkeypatch `AIRSPACE_PATH` to a nonexistent path, call `draw_airspace(image, bounds)`, assert no exception raised
 
-- [ ] Task 5: Run quality gates
-  - [ ] 5.1 `python -m pytest tests/` — all tests pass
-  - [ ] 5.2 `python -m ruff check .` — zero violations
-  - [ ] 5.3 `python -m ruff format --check .` — no formatting issues
+- [x] Task 5: Run quality gates
+  - [x] 5.1 `python -m pytest tests/` — all tests pass
+  - [x] 5.2 `python -m ruff check .` — zero violations
+  - [x] 5.3 `python -m ruff format --check .` — no formatting issues
 
 ## Dev Notes
 

_bmad-output/implementation-artifacts/sprint-status.yaml

@@ -55,7 +55,7 @@ development_status:
   epic-2: in-progress
   2-1-aircraft-data-model-and-fetcher: done
   2-2-coordinate-projection-and-base-map-loading: done
-  2-3-home-marker-and-airspace-outlines: ready-for-dev
+  2-3-home-marker-and-airspace-outlines: review
   2-4-altitude-colour-bands-and-aircraft-type-icons: backlog
   2-5-per-aircraft-drawing: backlog
   2-6-stateful-renderer-and-display-interface: backlog

src/planemapper/renderer/airspace.py

@@ -1 +1,30 @@
-# stub
+from __future__ import annotations
+
+import json
+import logging
+
+from PIL import Image, ImageDraw
+
+from planemapper.constants import AIRSPACE_PATH, COLOUR_AIRSPACE
+from planemapper.renderer.projection import MapBounds, project
+
+log = logging.getLogger(__name__)
+
+
+def draw_airspace(image: Image.Image, bounds: MapBounds) -> None:
+    try:
+        data = json.loads(AIRSPACE_PATH.read_text(encoding="utf-8"))
+    except FileNotFoundError:
+        log.warning("airspace.geojson not found at %s — skipping airspace overlay", AIRSPACE_PATH)
+        return
+    draw = ImageDraw.Draw(image)
+    for feature in data.get("features", []):
+        geom = feature.get("geometry", {})
+        if geom.get("type") != "Polygon":
+            continue
+        coords = geom.get("coordinates", [[]])[0]
+        if len(coords) < 2:
+            continue
+        # GeoJSON is [lon, lat] — reverse at parse boundary
+        points = [project(lat, lon, bounds) for lon, lat in coords]
+        draw.line(points, fill=COLOUR_AIRSPACE, width=2)

src/planemapper/renderer/overlay.py

@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+from PIL import Image, ImageDraw
+
+from planemapper.constants import COLOUR_HOME_MARKER
+from planemapper.renderer.projection import MapBounds, project
+
+
+def draw_home_marker(image: Image.Image, bounds: MapBounds) -> None:
+    cx, cy = project(bounds.home_lat, bounds.home_lon, bounds)
+    draw = ImageDraw.Draw(image)
+    draw.line([(cx - 10, cy), (cx + 10, cy)], fill=COLOUR_HOME_MARKER, width=3)
+    draw.line([(cx, cy - 10), (cx, cy + 10)], fill=COLOUR_HOME_MARKER, width=3)

tests/fixtures/airspace_sample.geojson

@@ -1 +1,21 @@
-{"type": "FeatureCollection", "features": []}
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "geometry": {
+        "type": "Polygon",
+        "coordinates": [
+          [
+            [-6.5, 53.3],
+            [-5.5, 53.3],
+            [-5.5, 53.7],
+            [-6.5, 53.7],
+            [-6.5, 53.3]
+          ]
+        ]
+      },
+      "properties": {"name": "Test Airspace"}
+    }
+  ]
+}

tests/test_airspace.py

@@ -0,0 +1,53 @@
+from __future__ import annotations
+
+import pathlib
+
+import pytest
+from PIL import Image
+
+from planemapper.renderer.airspace import draw_airspace
+from planemapper.renderer.overlay import draw_home_marker
+from planemapper.renderer.projection import MapBounds
+
+FIXTURE_DIR = pathlib.Path(__file__).parent / "fixtures"
+
+
+@pytest.fixture
+def white_image() -> Image.Image:
+    return Image.new("RGB", (800, 480), color=(255, 255, 255))
+
+
+@pytest.fixture
+def bounds() -> MapBounds:
+    return MapBounds(home_lat=53.0, home_lon=-6.0, radius_nm=100.0)
+
+
+def test_home_marker_draws_red_cross(white_image: Image.Image, bounds: MapBounds) -> None:
+    draw_home_marker(white_image, bounds)
+    # Centre pixel should be red (COLOUR_HOME_MARKER)
+    assert white_image.getpixel((400, 240)) == (255, 0, 0)
+
+
+def test_airspace_drawn_without_exception(
+    white_image: Image.Image,
+    bounds: MapBounds,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.setattr(
+        "planemapper.renderer.airspace.AIRSPACE_PATH",
+        FIXTURE_DIR / "airspace_sample.geojson",
+    )
+    draw_airspace(white_image, bounds)  # should not raise
+
+
+def test_airspace_missing_file_no_exception(
+    white_image: Image.Image,
+    bounds: MapBounds,
+    tmp_path: pathlib.Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.setattr(
+        "planemapper.renderer.airspace.AIRSPACE_PATH",
+        tmp_path / "nonexistent.geojson",
+    )
+    draw_airspace(white_image, bounds)  # should not raise — logs WARNING instead