Fix import: infer phone when missing

src/TelegramPanel.Core/Services/Telegram/AccountImportService.cs

@@ -347,7 +347,10 @@ public class AccountImportService
                 return new ImportResult(false, null, null, null, null, $"json 缺少 api_hash: {jsonPath}");
 
             if (!TryGetString(root, out var phone, "phone", "phone_number", "phoneNumber") || string.IsNullOrWhiteSpace(phone))
-                return new ImportResult(false, null, null, null, null, $"json 缺少 phone: {jsonPath}");
+            {
+                if (!TryInferPhone(root, jsonPath, out phone))
+                    return new ImportResult(false, null, null, null, null, $"json 缺少 phone: {jsonPath}");
+            }
 
             phone = PhoneNumberFormatter.NormalizeToDigits(phone);
             if (string.IsNullOrWhiteSpace(phone))
@@ -513,6 +516,16 @@ public class AccountImportService
         return string.IsNullOrWhiteSpace(username) ? null : username.Trim();
     }
 
+    private static bool TryInferPhone(System.Text.Json.JsonElement root, string jsonPath, out string? phone)
+    {
+        // 兼容一些导出：json 里 phone 可能为 null，但文件名/ session_file 会带 +手机号
+        if (!TryGetString(root, out phone, "session_file", "sessionFile") || string.IsNullOrWhiteSpace(phone))
+            phone = Path.GetFileNameWithoutExtension(jsonPath);
+
+        phone = string.IsNullOrWhiteSpace(phone) ? null : phone.Trim();
+        return !string.IsNullOrWhiteSpace(phone);
+    }
+
     private static bool LooksLikeSqliteSession(string filePath)
     {
         try

src/TelegramPanel.Web/Program.cs

@@ -72,8 +72,14 @@ if (args.Length >= 2 && string.Equals(args[0], "--diag-session-dir", StringCompa
 
             if (!TryGetString(root, out var phone, "phone") || string.IsNullOrWhiteSpace(phone))
             {
-                Console.WriteLine($"[FAIL] {Path.GetFileName(jsonPath)}: 缺少 phone");
-                continue;
+                if (!TryGetString(root, out phone, "session_file", "sessionFile") || string.IsNullOrWhiteSpace(phone))
+                    phone = Path.GetFileNameWithoutExtension(jsonPath);
+
+                if (string.IsNullOrWhiteSpace(phone))
+                {
+                    Console.WriteLine($"[FAIL] {Path.GetFileName(jsonPath)}: 缺少 phone");
+                    continue;
+                }
             }
 
             _ = TryGetLong(root, out var userId, "user_id", "uid");