fix: map overlay clicks, layer overlap, fan spacing, geocoding radius

- Move incident panel to left side (was topright, conflicting with LayersControl)
- Move legend to bottom-right, raise auto-fit button to clear it
- Tighten fan card step 7→5px for closer grouping
- Geocoding: remove bounded=1 hard clip, widen bias radius 0.1°→0.5° (~55km)
  so addresses like "34 Carlton Drive" resolve outside the node's immediate area

drb-c2-core/app/internal/intelligence.py

@@ -52,7 +52,7 @@ Talkgroup: {talkgroup_name}
 {ten_codes_block}{vocabulary_block}{transcript_block}"""
 
 # Nominatim viewbox half-width in degrees (~11 km at mid-latitudes)
-_GEO_DELTA = 0.1
+_GEO_DELTA = 0.5  # ~55 km bias radius; viewbox used as preference, not hard bound
 
 # node_id → state abbreviation/name from one-time reverse geocode
 _node_state_cache: dict[str, str] = {}
@@ -231,7 +231,7 @@ async def _geocode_location(
         "format":  "json",
         "limit":   1,
         "viewbox": viewbox,
-        "bounded": 1,
+        "bounded": 0,  # viewbox biases results but doesn't hard-clip them
     }
     headers = {"User-Agent": "DRB-Dispatch/1.0 (public-safety radio monitor)"}
     try: