fix: build warnings

Author: Piotr Stachaczynski

src/MaIN.Services/Services/DataSourceProvider.cs

@@ -68,7 +68,7 @@ public async Task<string> FetchApiData(object? details, string? filter,
 
         if (!apiDetails?.AuthenticationToken.IsNullOrEmpty() ?? false)
         {
-            if (!apiDetails.AuthenticationType.HasValue)
+            if (!apiDetails!.AuthenticationType.HasValue)
                 throw new InvalidOperationException("Please specify an authorization type");
 
             switch (apiDetails.AuthenticationType)

src/MaIN.Services/Services/LLMService/AnthropicService.cs

@@ -347,9 +347,10 @@ await notificationService.DispatchNotification(
 
         var toolUseBuilders = new Dictionary<int, AnthropicToolUseBuilder>();
 
-        while (!reader.EndOfStream)
+        while (true)
         {
             var line = await reader.ReadLineAsync(cancellationToken);
+            if (line is null) break;
             if (string.IsNullOrWhiteSpace(line))
                 continue;
 
@@ -679,9 +680,10 @@ private async Task ProcessStreamingChatAsync(
         await using var stream = await response.Content.ReadAsStreamAsync(cancellationToken);
         using var reader = new StreamReader(stream);
 
-        while (!reader.EndOfStream)
+        while (true)
         {
             var line = await reader.ReadLineAsync(cancellationToken);
+            if (line is null) break;
             if (string.IsNullOrWhiteSpace(line))
                 continue;
 

src/MaIN.Services/Services/LLMService/GeminiService.cs

@@ -155,7 +155,7 @@ protected override void ApplyBackendParams(Dictionary<string, object> requestBod
 
                     if (requestOptions.InteractiveUpdates)
                     {
-                        await notificationService.DispatchNotification(
+                        await _notificationService.DispatchNotification(
                             NotificationMessageBuilder.CreateChatCompletion(chat.Id, tokenValue, false),
                             ServiceConstants.Notifications.ReceiveMessageUpdate);
                     }

src/MaIN.Services/Services/LLMService/OpenAiCompatibleService.cs

@@ -314,9 +314,10 @@ await _notificationService.DispatchNotification(
 
         var toolCallsBuilder = new Dictionary<int, ToolCallBuilder>();
 
-        while (!reader.EndOfStream)
+        while (true)
         {
             var line = await reader.ReadLineAsync(cancellationToken);
+            if (line is null) break;
             if (string.IsNullOrWhiteSpace(line))
                 continue;
 
@@ -755,11 +756,12 @@ private async Task ProcessStreamingChatAsync(
         await using var stream = await response.Content.ReadAsStreamAsync(cancellationToken);
         using var reader = new StreamReader(stream);
 
-        while (!reader.EndOfStream)
+        while (true)
         {
             cancellationToken.ThrowIfCancellationRequested();
 
             var line = await reader.ReadLineAsync(cancellationToken);
+            if (line is null) break;
             if (string.IsNullOrWhiteSpace(line))
                 continue;
 

src/MaIN.Services/Services/LLMService/VertexService.cs

@@ -24,6 +24,7 @@ public sealed class VertexService(
     ILogger<VertexService>? logger = null)
     : OpenAiCompatibleService(notificationService, httpClientFactory, memoryFactory, memoryService, logger), ILLMService
 {
+    private readonly IHttpClientFactory _httpClientFactory = httpClientFactory;
     private GoogleServiceAccountTokenProvider? _tokenProvider;
     private string _location = "us-central1";
 
@@ -46,7 +47,7 @@ protected override string GetApiKey()
         var auth = Auth;
         _tokenProvider ??= new GoogleServiceAccountTokenProvider(auth);
 
-        var httpClient = httpClientFactory.CreateClient(HttpClientName);
+        var httpClient = _httpClientFactory.CreateClient(HttpClientName);
         // Task.Run avoids deadlocking on Blazor Server's single-threaded SynchronizationContext
         return Task.Run(() => _tokenProvider.GetAccessTokenAsync(httpClient)).GetAwaiter().GetResult();
     }

src/MaIN.Services/Services/McpService.cs

@@ -146,16 +146,16 @@ private async Task<McpResult> PromptWithHttp(
                     .Deserialize<Dictionary<string, JsonElement>>(argsJson)
                     ?.ToDictionary(
                         kvp => kvp.Key,
-                        kvp => kvp.Value.ValueKind switch
+                        kvp => (object?)(kvp.Value.ValueKind switch
                         {
                             JsonValueKind.String => (object)kvp.Value.GetString()!,
                             JsonValueKind.True => true,
                             JsonValueKind.False => false,
                             JsonValueKind.Number when kvp.Value.TryGetInt64(out var l) => l,
                             JsonValueKind.Number => (object)kvp.Value.GetDouble(),
                             _ => (object)kvp.Value
-                        })
-                    ?? new Dictionary<string, object>();
+                        }))
+                    ?? new Dictionary<string, object?>();
 
                 var toolResult = await mcpClient.CallToolAsync(toolName, argsDict);
                 var resultText = string.Join("\n", toolResult.Content
@@ -291,16 +291,16 @@ private async Task<McpResult> PromptWithAnthropic(
                     .Deserialize<Dictionary<string, JsonElement>>(inputElement.GetRawText())
                     ?.ToDictionary(
                         kvp => kvp.Key,
-                        kvp => kvp.Value.ValueKind switch
+                        kvp => (object?)(kvp.Value.ValueKind switch
                         {
                             JsonValueKind.String => (object)kvp.Value.GetString()!,
                             JsonValueKind.True => true,
                             JsonValueKind.False => false,
                             JsonValueKind.Number when kvp.Value.TryGetInt64(out var l) => l,
                             JsonValueKind.Number => (object)kvp.Value.GetDouble(),
                             _ => (object)kvp.Value
-                        })
-                    ?? new Dictionary<string, object>();
+                        }))
+                    ?? new Dictionary<string, object?>();
 
                 var toolResult = await mcpClient.CallToolAsync(toolName, argsDict);
                 var resultText = string.Join("\n", toolResult.Content

src/MaIN.Services/Services/Steps/Commands/FetchCommandHandler.cs

@@ -154,7 +154,7 @@ await notificationService.DispatchNotification(
                 "ReceiveAgentUpdate");
 
             var result = await llmServiceFactory.CreateService(backend)
-                .AskMemory(memoryChat!, new ChatMemoryOptions { TextData = new Dictionary<string, string> { ["web-content"] = cleanText } }, new ChatRequestOptions());
+                .AskMemory(memoryChat!, new ChatMemoryOptions { TextData = new Dictionary<string, string> { ["web-content"] = cleanText ?? string.Empty } }, new ChatRequestOptions());
 
             await notificationService.DispatchNotification(
                 NotificationMessageBuilder.CreateActorProgress(