feat: optimize settings management and admin functionality

- Add system log cleanup functionality with batch processing
- Optimize v2_settings table performance by unifying value storage
- Add comprehensive client support list for one-click subscription
- Fix QR code subscription links for specific node types
- Fix route addition issues in admin management panel
- Enhance admin system controller with log management APIs

app/Models/Setting.php

@@ -9,29 +9,60 @@ class Setting extends Model
     protected $table = 'v2_settings';
     protected $guarded = [];
     protected $casts = [
-        'key' => 'string',
+        'name' => 'string',
         'value' => 'string',
     ];
 
-    public function getValueAttribute($value)
+    /**
+     * 获取实际内容值
+     */
+    public function getContentValue()
     {
-        if ($value === null) {
+        $rawValue = $this->attributes['value'] ?? null;
+        
+        if ($rawValue === null) {
             return null;
         }
 
-        if (is_array($value)) {
-            return $value;
+        // 如果已经是数组，直接返回
+        if (is_array($rawValue)) {
+            return $rawValue;
         }
 
-        if (is_numeric($value) && !preg_match('/[^\d.]/', $value)) {
-            return $value;
+        // 如果是数字字符串，返回原值
+        if (is_numeric($rawValue) && !preg_match('/[^\d.]/', $rawValue)) {
+            return $rawValue;
         }
 
-        $decodedValue = json_decode($value, true);
-        if (json_last_error() === JSON_ERROR_NONE) {
-            return $decodedValue;
+        // 尝试解析 JSON
+        if (is_string($rawValue)) {
+            $decodedValue = json_decode($rawValue, true);
+            if (json_last_error() === JSON_ERROR_NONE) {
+                return $decodedValue;
+            }
         }
 
-        return $value;
+        return $rawValue;
+    }
+
+    /**
+     * 兼容性：保持原有的 value 访问器
+     */
+    public function getValueAttribute($value)
+    {
+        return $this->getContentValue();
+    }
+
+    /**
+     * 创建或更新设置项
+     */
+    public static function createOrUpdate(string $name, $value): self
+    {
+        $processedValue = is_array($value) ? json_encode($value) : $value;
+        
+        return self::updateOrCreate(
+            ['name' => $name],
+            ['value' => $processedValue]
+        );
     }
 }