feat: register NDVI indicator and add raster map support to worker

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

app/indicators/__init__.py

@@ -8,8 +8,10 @@ from app.indicators.no2 import NO2Indicator
 from app.indicators.lst import LSTIndicator
 from app.indicators.nightlights import NightlightsIndicator
 from app.indicators.food_security import FoodSecurityIndicator
+from app.indicators.ndvi import NdviIndicator
 
 registry = IndicatorRegistry()
+registry.register(NdviIndicator())
 registry.register(FiresIndicator())
 registry.register(CroplandIndicator())
 registry.register(VegetationIndicator())

app/worker.py

@@ -91,7 +91,27 @@ async def process_job(job_id: str, db: Database, registry: IndicatorRegistry) ->
             # Generate map PNG for every indicator
             spatial = spatial_cache.get(result.indicator_id)
             map_path = os.path.join(results_dir, f"{result.indicator_id}_map.png")
-            if spatial is not None:
+
+            if spatial is not None and spatial.map_type == "raster":
+                # New: raster-on-true-color rendering for openEO indicators
+                indicator_obj = registry.get(result.indicator_id)
+                raster_path = getattr(indicator_obj, '_indicator_raster_path', None)
+                true_color_path = getattr(indicator_obj, '_true_color_path', None)
+                peak_band = getattr(indicator_obj, '_ndvi_peak_band', 1)
+                from app.outputs.maps import render_raster_map
+                render_raster_map(
+                    true_color_path=true_color_path,
+                    indicator_path=raster_path,
+                    indicator_band=peak_band,
+                    aoi=job.request.aoi,
+                    status=result.status,
+                    output_path=map_path,
+                    cmap=spatial.colormap,
+                    vmin=-0.2 if "ndvi" in result.indicator_id else None,
+                    vmax=0.9 if "ndvi" in result.indicator_id else None,
+                    label=spatial.label,
+                )
+            elif spatial is not None:
                 render_indicator_map(
                     spatial=spatial,
                     aoi=job.request.aoi,