feat: add admin settings panel and dashboard configurations

src/app/Http/Controllers/AdminController.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+use App\Models\Setting;
+
+class AdminController extends Controller
+{
+    public function index()
+    {
+        return view('admin.index');
+    }
+
+    public function dashboardSettings($dashboard)
+    {
+        // Define available settings per dashboard here for simplicity
+        $schema = [];
+        if ($dashboard === 'procurement') {
+            $schema = [
+                ['key' => 'target_margin', 'name' => 'Target Margin (%)', 'type' => 'integer', 'default' => 20, 'description' => 'Target gross margin percentage for alerts.'],
+                ['key' => 'low_stock_threshold', 'name' => 'Low Stock Warning', 'type' => 'integer', 'default' => 50, 'description' => 'Quantity at which a product is considered low stock.'],
+                ['key' => 'default_date_range', 'name' => 'Default Date Filter', 'type' => 'string', 'default' => 'YTD', 'description' => 'Default date range on load (e.g. YTD, All).'],
+            ];
+        } else if ($dashboard === 'sales') {
+            $schema = [
+                ['key' => 'monthly_target', 'name' => 'Monthly Sales Target', 'type' => 'integer', 'default' => 100000, 'description' => 'Overall monthly sales target.'],
+            ];
+        } else {
+            abort(404);
+        }
+
+        // Fetch current settings from DB
+        $settings = Setting::where('dashboard', $dashboard)->get()->keyBy('key');
+
+        return view('admin.settings', compact('dashboard', 'schema', 'settings'));
+    }
+
+    public function updateSettings(Request $request, $dashboard)
+    {
+        $settingsData = $request->except('_token');
+
+        foreach ($settingsData as $key => $value) {
+            Setting::updateOrCreate(
+                ['dashboard' => $dashboard, 'key' => $key],
+                ['value' => $value]
+            );
+        }
+
+        return redirect()->back()->with('success', ucfirst($dashboard) . ' settings saved successfully!');
+    }
+}