feat: add Google Maps → Email pipeline (Tab 4)

- New Maps page with keyword + region chips, German city presets, query preview, enrichment toggle
- Google Maps Places API (New) service with pagination and deduplication
- maps-enrich job route: Maps search → store raw leads → optional Anymailfinder bulk enrichment
- Settings: Google Maps API key credential card with Places API instructions
- Sidebar: MapPin nav item + googlemaps credential status indicator
- Results: maps job type with MapPin icon (text-green-400)
- Credentials API: added googlemaps to SERVICES array and test endpoint

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

app/results/page.tsx

@@ -7,7 +7,7 @@ import { Skeleton } from "@/components/ui/skeleton";
 import { EmptyState } from "@/components/shared/EmptyState";
 import { StatusBadge } from "@/components/shared/ProgressCard";
 import { toast } from "sonner";
-import { BarChart3, Building2, Linkedin, Search, Download, Trash2, RefreshCw } from "lucide-react";
+import { BarChart3, Building2, Linkedin, Search, MapPin, Download, Trash2, RefreshCw } from "lucide-react";
 import { cn } from "@/lib/utils";
 
 interface Job {
@@ -32,6 +32,7 @@ const TYPE_CONFIG: Record<string, { icon: typeof Building2; label: string; color
   linkedin: { icon: Linkedin, label: "LinkedIn", color: "text-blue-500" },
   "linkedin-enrich": { icon: Linkedin, label: "LinkedIn Enrich", color: "text-blue-400" },
   serp: { icon: Search, label: "SERP", color: "text-purple-400" },
+  maps: { icon: MapPin, label: "Google Maps", color: "text-green-400" },
 };
 
 export default function ResultsPage() {