🎉 **Introduce meetup activity management**

- Added `is_active` and `last_event_at` fields to meetups with migration.
- Enhanced UI: Display `Aktiv`/`Inaktiv` badges and last event dates across dashboard, tables, and maps.
- Introduced `/meetups:update-activity` command to manage activity flags and timestamps.
- Validated latitude/longitude to prevent `0,0` inputs in city creation and updates.
- Updated factories and tests to include meetup activity states (`active`, `inactive`).

database/factories/MeetupFactory.php

@@ -38,6 +38,24 @@ class MeetupFactory extends Factory
             'nostr' => NostrHelper::randomNpub(),
             'nostr_status' => NostrHelper::fakeNostrEventStatus(),
             'created_by' => User::factory(),
+            'is_active' => false,
+            'last_event_at' => null,
         ];
     }
+
+    public function active(): static
+    {
+        return $this->state(fn (array $attrs) => [
+            'is_active' => true,
+            'last_event_at' => now()->subDays(30),
+        ]);
+    }
+
+    public function inactive(): static
+    {
+        return $this->state(fn (array $attrs) => [
+            'is_active' => false,
+            'last_event_at' => now()->subYears(2),
+        ]);
+    }
 }