feat(dees-geo-map): Highlight current navigation step with progress, mark completed steps, auto-scroll turn-by-turn list, expose guidance state for synchronization, and refine instruction/voice wording

ts_web/elements/00group-map/dees-geo-map/geo-map.navigation-guide.ts

@@ -184,6 +184,8 @@ function formatManeuverForVoice(type: string, modifier?: string): string {
       return 'continue straight';
     case 'end of road':
       return `at the end of the road, turn ${modifier || 'around'}`;
+    case 'new name':
+      return 'continue straight';
     default:
       return type;
   }
@@ -597,7 +599,9 @@ export class NavigationGuideController {
       // Approach - "In 200 meters, turn left"
       const distanceStr = formatDistanceForVoice(distance);
       this.voiceManager.speakApproach(distanceStr, maneuver, streetName);
-      const instruction = `In ${distanceStr}, ${maneuver}${streetName ? ` onto ${streetName}` : ''}`;
+      // Use "on" for continue, "onto" for turns/merges
+      const preposition = maneuver.startsWith('continue') ? 'on' : 'onto';
+      const instruction = `In ${distanceStr}, ${maneuver}${streetName ? ` ${preposition} ${streetName}` : ''}`;
       this.emitGuidanceEvent('approach-maneuver', position, step, instruction);
     }
   }
@@ -867,6 +871,7 @@ export class NavigationGuideController {
       'merge': '⤵️',
       'fork-left': '↖',
       'fork-right': '↗',
+      'new name': '⬆️',
     };
 
     const key = modifier ? `${type}-${modifier}` : type;
@@ -894,6 +899,12 @@ export class NavigationGuideController {
       case 'roundabout':
       case 'rotary':
         return `At the roundabout, take the exit onto ${name}`;
+      case 'fork':
+        return `Take the ${modifier || ''} fork onto ${name}`;
+      case 'end of road':
+        return `At the end of the road, turn ${modifier || ''} onto ${name}`;
+      case 'new name':
+        return `Continue on ${name}`;
       default:
         return `${type} on ${name}`;
     }