feat(admin): 开通线索支持状态流转（set-status）

app/Http/Controllers/Admin/PlatformLeadController.php

@@ -6,7 +6,9 @@ use App\Http\Controllers\Concerns\ResolvesPlatformAdminContext;
 use App\Http\Controllers\Controller;
 use App\Models\PlatformLead;
 use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
+use Illuminate\Validation\Rule;
 use Illuminate\View\View;
 
 class PlatformLeadController extends Controller
@@ -40,13 +42,32 @@ class PlatformLeadController extends Controller
         return view('admin.platform_leads.index', [
             'leads' => $leads,
             'filters' => $filters,
-            'statusLabels' => [
-                'new' => '新线索',
-                'contacted' => '已联系',
-                'qualified' => '已确认需求',
-                'converted' => '已转化',
-                'closed' => '已关闭',
-            ],
+            'statusLabels' => $this->statusLabels(),
         ]);
     }
+
+    public function setStatus(Request $request, PlatformLead $lead): RedirectResponse
+    {
+        $this->ensurePlatformAdmin($request);
+
+        $data = $request->validate([
+            'status' => ['required', Rule::in(array_keys($this->statusLabels()))],
+        ]);
+
+        $lead->status = (string) $data['status'];
+        $lead->save();
+
+        return redirect()->back()->with('success', '线索状态已更新：#' . $lead->id . ' → ' . ($this->statusLabels()[$lead->status] ?? $lead->status));
+    }
+
+    private function statusLabels(): array
+    {
+        return [
+            'new' => '新线索',
+            'contacted' => '已联系',
+            'qualified' => '已确认需求',
+            'converted' => '已转化',
+            'closed' => '已关闭',
+        ];
+    }
 }