fix(bot-channels): 自动选择执行账号按权限过滤

- 解析 Bot API 管理员权限(can_invite_users/can_promote_members)

- 批量邀请/设管理员自动选择时跳过无权限账号并给出原因

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

@@ -393,6 +393,8 @@ public class BotTelegramService
 
             var status = el.TryGetProperty("status", out var statusEl) ? (statusEl.GetString() ?? "") : "";
             var customTitle = el.TryGetProperty("custom_title", out var ctEl) ? ctEl.GetString() : null;
+            var canInviteUsers = ReadBool(el, "can_invite_users");
+            var canPromoteMembers = ReadBool(el, "can_promote_members");
 
             if (!el.TryGetProperty("user", out var userEl) || userEl.ValueKind != JsonValueKind.Object)
                 continue;
@@ -410,7 +412,9 @@ public class BotTelegramService
                 FirstName: firstName,
                 LastName: lastName,
                 Status: status,
-                CustomTitle: string.IsNullOrWhiteSpace(customTitle) ? null : customTitle.Trim()
+                CustomTitle: string.IsNullOrWhiteSpace(customTitle) ? null : customTitle.Trim(),
+                CanInviteUsers: canInviteUsers,
+                CanPromoteMembers: canPromoteMembers
             ));
         }
 
@@ -646,7 +650,15 @@ public class BotTelegramService
 
     public sealed record BotChatInfo(long TelegramId, string Type, string? Title, string? Username, string? Description, int? MemberCount);
 
-    public sealed record BotChatAdminInfo(long UserId, string? Username, string? FirstName, string? LastName, string Status, string? CustomTitle)
+    public sealed record BotChatAdminInfo(
+        long UserId,
+        string? Username,
+        string? FirstName,
+        string? LastName,
+        string Status,
+        string? CustomTitle,
+        bool CanInviteUsers,
+        bool CanPromoteMembers)
     {
         public bool IsCreator => string.Equals(Status, "creator", StringComparison.OrdinalIgnoreCase);
         public string DisplayName

src/TelegramPanel.Web/Components/Dialogs/BotChannelBatchAdminsDialog.razor

@@ -148,7 +148,7 @@
     private readonly Random _rand = new();
     private readonly List<Account> eligibleAccounts = new();
     private readonly Dictionary<long, Account> accountsByUserId = new();
-    private readonly Dictionary<long, HashSet<long>> channelAdminUserIds = new();
+    private readonly Dictionary<long, List<BotTelegramService.BotChatAdminInfo>> channelAdmins = new();
 
     private List<BotChannel> channels = new();
     private int selectedAccountId;
@@ -228,7 +228,7 @@
         loadingAdmins = true;
         adminSummary = null;
         eligibleAccounts.Clear();
-        channelAdminUserIds.Clear();
+        channelAdmins.Clear();
         try
         {
             var eligibleUserIds = new HashSet<long>();
@@ -236,13 +236,12 @@
 
             foreach (var ch in channels)
             {
-                var adminIds = new HashSet<long>();
+                var admins = new List<BotTelegramService.BotChatAdminInfo>();
                 try
                 {
-                    var admins = await BotTelegram.GetChatAdminsAsync(BotId, ch.TelegramId, CancellationToken.None);
+                    admins = await BotTelegram.GetChatAdminsAsync(BotId, ch.TelegramId, CancellationToken.None);
                     foreach (var a in admins)
                     {
-                        adminIds.Add(a.UserId);
                         if (accountsByUserId.ContainsKey(a.UserId))
                             eligibleUserIds.Add(a.UserId);
                     }
@@ -255,7 +254,7 @@
                     // ignore
                 }
 
-                channelAdminUserIds[ch.TelegramId] = adminIds;
+                channelAdmins[ch.TelegramId] = admins;
             }
 
             foreach (var uid in eligibleUserIds)
@@ -422,7 +421,7 @@
 
             foreach (var ch in channels)
             {
-                var executorId = ResolveExecutorAccountId(ch);
+                var (executorId, reason) = ResolveExecutorAccountId(ch);
                 if (executorId == null)
                 {
                     foreach (var _ in usernames)
@@ -431,7 +430,7 @@
                         failed++;
                     }
 
-                    failures.Add($"{ch.Title}：无可用执行账号（需要该频道管理员且存在于系统账号）");
+                    failures.Add($"{ch.Title}：{reason ?? "无可用执行账号"}");
                     StateHasChanged();
                     continue;
                 }
@@ -530,27 +529,37 @@
         }
     }
 
-    private int? ResolveExecutorAccountId(BotChannel channel)
+    private (int? ExecutorId, string? Reason) ResolveExecutorAccountId(BotChannel channel)
     {
-        if (!channelAdminUserIds.TryGetValue(channel.TelegramId, out var adminIds) || adminIds.Count == 0)
-            return null;
+        if (!channelAdmins.TryGetValue(channel.TelegramId, out var admins) || admins.Count == 0)
+            return (null, "无法获取频道管理员列表（请确认 Bot 已加入且为管理员）");
 
         if (selectedAccountId > 0)
         {
             var selected = eligibleAccounts.FirstOrDefault(x => x.Id == selectedAccountId);
             if (selected == null || selected.UserId <= 0)
-                return null;
+                return (null, "所选执行账号无效");
 
-            return adminIds.Contains(selected.UserId) ? selected.Id : null;
+            var admin = admins.FirstOrDefault(x => x.UserId == selected.UserId);
+            if (admin == null)
+                return (null, "所选执行账号不是该频道管理员");
+
+            if (!admin.IsCreator && !admin.CanPromoteMembers)
+                return (null, "所选执行账号缺少“添加管理员”权限");
+
+            return (selected.Id, null);
         }
 
-        foreach (var uid in adminIds)
+        foreach (var a in admins)
         {
-            if (accountsByUserId.TryGetValue(uid, out var acc))
-                return acc.Id;
+            if (!a.IsCreator && !a.CanPromoteMembers)
+                continue;
+
+            if (accountsByUserId.TryGetValue(a.UserId, out var acc))
+                return (acc.Id, null);
         }
 
-        return null;
+        return (null, "无可用执行账号（需要该频道管理员且拥有“添加管理员”权限，并且在系统中存在）");
     }
 
     private void CancelOrClose()

src/TelegramPanel.Web/Components/Dialogs/BotChannelBatchInviteDialog.razor

@@ -116,7 +116,7 @@
     private readonly Random _rand = new();
     private readonly List<Account> eligibleAccounts = new();
     private readonly Dictionary<long, Account> accountsByUserId = new();
-    private readonly Dictionary<long, HashSet<long>> channelAdminUserIds = new();
+    private readonly Dictionary<long, List<BotTelegramService.BotChatAdminInfo>> channelAdmins = new();
 
     private List<BotChannel> channels = new();
     private int selectedAccountId;
@@ -179,7 +179,7 @@
         loadingAdmins = true;
         adminSummary = null;
         eligibleAccounts.Clear();
-        channelAdminUserIds.Clear();
+        channelAdmins.Clear();
         try
         {
             var eligibleUserIds = new HashSet<long>();
@@ -187,13 +187,12 @@
 
             foreach (var ch in channels)
             {
-                var adminIds = new HashSet<long>();
+                var admins = new List<BotTelegramService.BotChatAdminInfo>();
                 try
                 {
-                    var admins = await BotTelegram.GetChatAdminsAsync(BotId, ch.TelegramId, CancellationToken.None);
+                    admins = await BotTelegram.GetChatAdminsAsync(BotId, ch.TelegramId, CancellationToken.None);
                     foreach (var a in admins)
                     {
-                        adminIds.Add(a.UserId);
                         if (accountsByUserId.ContainsKey(a.UserId))
                             eligibleUserIds.Add(a.UserId);
                     }
@@ -206,7 +205,7 @@
                     // ignore: 无权限/风控/频道已失效等，后续按“无可用执行账号”处理
                 }
 
-                channelAdminUserIds[ch.TelegramId] = adminIds;
+                channelAdmins[ch.TelegramId] = admins;
             }
 
             foreach (var uid in eligibleUserIds)
@@ -353,7 +352,7 @@
 
             foreach (var ch in channels)
             {
-                var executorId = ResolveExecutorAccountId(ch);
+                var (executorId, reason) = ResolveExecutorAccountId(ch);
                 if (executorId == null)
                 {
                     foreach (var _ in usernames)
@@ -362,7 +361,7 @@
                         failed++;
                     }
 
-                    failures.Add($"{ch.Title}：无可用执行账号（需要该频道管理员且存在于系统账号）");
+                    failures.Add($"{ch.Title}：{reason ?? "无可用执行账号"}");
                     StateHasChanged();
                     continue;
                 }
@@ -461,27 +460,37 @@
         }
     }
 
-    private int? ResolveExecutorAccountId(BotChannel channel)
+    private (int? ExecutorId, string? Reason) ResolveExecutorAccountId(BotChannel channel)
     {
-        if (!channelAdminUserIds.TryGetValue(channel.TelegramId, out var adminIds) || adminIds.Count == 0)
-            return null;
+        if (!channelAdmins.TryGetValue(channel.TelegramId, out var admins) || admins.Count == 0)
+            return (null, "无法获取频道管理员列表（请确认 Bot 已加入且为管理员）");
 
         if (selectedAccountId > 0)
         {
             var selected = eligibleAccounts.FirstOrDefault(x => x.Id == selectedAccountId);
             if (selected == null || selected.UserId <= 0)
-                return null;
+                return (null, "所选执行账号无效");
 
-            return adminIds.Contains(selected.UserId) ? selected.Id : null;
+            var admin = admins.FirstOrDefault(x => x.UserId == selected.UserId);
+            if (admin == null)
+                return (null, "所选执行账号不是该频道管理员");
+
+            if (!admin.IsCreator && !admin.CanInviteUsers)
+                return (null, "所选执行账号缺少“邀请用户”权限");
+
+            return (selected.Id, null);
         }
 
-        foreach (var uid in adminIds)
+        foreach (var a in admins)
         {
-            if (accountsByUserId.TryGetValue(uid, out var acc))
-                return acc.Id;
+            if (!a.IsCreator && !a.CanInviteUsers)
+                continue;
+
+            if (accountsByUserId.TryGetValue(a.UserId, out var acc))
+                return (acc.Id, null);
         }
 
-        return null;
+        return (null, "无可用执行账号（需要该频道管理员且拥有“邀请用户”权限，并且在系统中存在）");
     }
 
     private void CancelOrClose()