feat(formulus): observations map view with offline support

formulus/package.json

@@ -27,6 +27,7 @@
     "prebuild": "pnpm run sync:version && pnpm run generate"
   },
   "dependencies": {
+    "@maplibre/maplibre-react-native": "11.5.1",
     "@notifee/react-native": "^9.1.8",
     "@nozbe/simdjson": "3.9.4",
     "@nozbe/sqlite": "3.46.0",

formulus/scripts/generate-map-cluster-badges.py

@@ -0,0 +1,61 @@
+"""
+Regenerates the cluster count badges used by the Observations map
+(src/assets/map/cluster-*.png). Counts are images, not map text, so they
+render offline without map fonts. Requires Pillow >= 10.1.
+
+    python scripts/generate-map-cluster-badges.py
+"""
+
+from pathlib import Path
+
+from PIL import Image, ImageDraw, ImageFont
+
+from_root = Path(__file__).resolve().parent.parent
+OUT = from_root / "src" / "assets" / "map"
+SCALE = 3
+FONT_PX = 13 * SCALE
+STROKE_PX = 1 * SCALE
+
+LABELS = {str(n): str(n) for n in range(2, 10)}
+LABELS.update(
+    {
+        "10p": "10+",
+        "20p": "20+",
+        "50p": "50+",
+        "100p": "100+",
+        "200p": "200+",
+        "500p": "500+",
+        "1kp": "1k+",
+        "2kp": "2k+",
+        "5kp": "5k+",
+        "10kp": "10k+",
+    }
+)
+
+
+def main():
+    OUT.mkdir(parents=True, exist_ok=True)
+    font = ImageFont.load_default(size=FONT_PX)
+    for key, text in LABELS.items():
+        left, top, right, bottom = font.getbbox(text, stroke_width=STROKE_PX)
+        pad = STROKE_PX
+        image = Image.new("RGBA", (right - left + pad * 2, bottom - top + pad * 2), (0, 0, 0, 0))
+        ImageDraw.Draw(image).text(
+            (pad - left, pad - top),
+            text,
+            font=font,
+            fill=(255, 255, 255, 255),
+            stroke_width=STROKE_PX,
+            stroke_fill=(0, 0, 0, 110),
+        )
+        image.save(OUT / f"cluster-{key}@3x.png", optimize=True)
+        base = image.resize(
+            (max(1, image.width // SCALE), max(1, image.height // SCALE)),
+            Image.LANCZOS,
+        )
+        base.save(OUT / f"cluster-{key}.png", optimize=True)
+    print(f"Wrote {len(LABELS)} badges to {OUT}")
+
+
+if __name__ == "__main__":
+    main()