Add chat bulk actions and avatar cache

server/QMax.Api/Infrastructure/Max/IMaxBridgeClient.cs

@@ -9,6 +9,8 @@ public interface IMaxBridgeClient
     Task<IReadOnlyList<MaxChatUpdate>> FetchUpdatesAsync(CancellationToken cancellationToken);
     Task<MaxChatUpdate?> FetchChatHistoryAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken);
     Task<MaxChatPresence?> FetchChatPresenceAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken);
+    Task<MaxActionResult> ClearChatHistoryAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken);
+    Task<MaxActionResult> DeleteChatAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken);
     Task<MaxSendResult> SendTextAsync(string externalChatId, string? chatUrl, string text, CancellationToken cancellationToken);
     Task<MaxSendResult> SendAttachmentAsync(string externalChatId, string? chatUrl, string path, string caption, CancellationToken cancellationToken);
     Task<MaxActionResult> EditMessageAsync(string externalChatId, string externalMessageId, string? currentText, string text, CancellationToken cancellationToken);

server/QMax.Api/Infrastructure/Max/MockMaxBridgeClient.cs

@@ -56,6 +56,16 @@ public sealed class MockMaxBridgeClient : IMaxBridgeClient
         return Task.FromResult<MaxChatPresence?>(new MaxChatPresence(false, null, DateTimeOffset.UtcNow));
     }
 
+    public Task<MaxActionResult> ClearChatHistoryAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken)
+    {
+        return Task.FromResult(new MaxActionResult(true, null));
+    }
+
+    public Task<MaxActionResult> DeleteChatAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken)
+    {
+        return Task.FromResult(new MaxActionResult(true, null));
+    }
+
     public Task<MaxSendResult> SendTextAsync(string externalChatId, string? chatUrl, string text, CancellationToken cancellationToken)
     {
         return Task.FromResult(new MaxSendResult(true, $"mock-out-{Guid.NewGuid():N}", null, MockChatUrl(externalChatId)));

server/QMax.Api/Infrastructure/Max/WorkerMaxBridgeClient.cs

@@ -53,6 +53,26 @@ public sealed class WorkerMaxBridgeClient(
         return await SendAsync<MaxChatPresence>(HttpMethod.Post, "/chat/presence", new { externalChatId, chatUrl }, cancellationToken);
     }
 
+    public async Task<MaxActionResult> ClearChatHistoryAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken)
+    {
+        return await SendAsync<MaxActionResult>(
+                HttpMethod.Post,
+                "/chat/clear-history",
+                new { externalChatId, chatUrl },
+                cancellationToken)
+            ?? new MaxActionResult(false, "Worker returned an empty clear history result.");
+    }
+
+    public async Task<MaxActionResult> DeleteChatAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken)
+    {
+        return await SendAsync<MaxActionResult>(
+                HttpMethod.Post,
+                "/chat/delete",
+                new { externalChatId, chatUrl },
+                cancellationToken)
+            ?? new MaxActionResult(false, "Worker returned an empty delete chat result.");
+    }
+
     public async Task<MaxSendResult> SendTextAsync(string externalChatId, string? chatUrl, string text, CancellationToken cancellationToken)
     {
         return await SendAsync<MaxSendResult>(HttpMethod.Post, "/send/text", new { externalChatId, chatUrl, text }, cancellationToken)