Persist backend profiles with capabilities

Add per-backend profile storage (model + capability flags) and use it in settings UI. SettingsService: introduce BackendProfile record and SaveProfileForBackendAsync/GetProfileForBackendAsync using a new storage key. Settings.razor: load profile on backend select, restore manual vision/reasoning/imagegen flags only for unregistered models, fallback to legacy model-history when no profile exists, and save the full profile instead of just the model. This enables preserving capability information per backend while remaining compatible with older model-only entries.

Author: Madzionator

src/MaIN.InferPage/Components/Pages/Settings.razor

@@ -278,11 +278,27 @@
         if (_selectedBackend == null) return;
 
         var backendKey = GetBackendStorageKey();
-        var lastModel = await SettingsStorage.GetLastModelForBackendAsync(backendKey);
-        if (!string.IsNullOrEmpty(lastModel))
+        var profile = await SettingsStorage.GetProfileForBackendAsync(backendKey);
+        if (profile != null)
         {
-            _modelName = lastModel;
-            OnModelNameChanged();
+            _modelName = profile.Model;
+            OnModelNameChanged();                    // sets _isRegisteredModel + auto-detects caps
+            if (!_isRegisteredModel)                // only restore manual caps for unregistered models
+            {
+                _manualVision    = profile.Vision;
+                _manualReasoning = profile.Reasoning;
+                _manualImageGen  = profile.ImageGen;
+            }
+        }
+        else
+        {
+            // Fallback: old model-history entry (no capability info)
+            var lastModel = await SettingsStorage.GetLastModelForBackendAsync(backendKey);
+            if (!string.IsNullOrEmpty(lastModel))
+            {
+                _modelName = lastModel;
+                OnModelNameChanged();
+            }
         }
 
         await LoadApiKeyPreview();
@@ -370,7 +386,8 @@
         };
         await SettingsStorage.SaveSettingsAsync(settings);
 
-        await SettingsStorage.SaveModelForBackendAsync(backendKey, _modelName);
+        await SettingsStorage.SaveProfileForBackendAsync(
+            backendKey, _modelName, hasVision, hasReasoning, hasImageGen);
 
         // Resolve API key: use new input, or fall back to saved key
         string? apiKey = null;

src/MaIN.InferPage/Services/SettingsService.cs

@@ -23,6 +23,24 @@ public async Task<bool> HasSettingsAsync()
     public Task SaveModelForBackendAsync(string backend, string model) => SetInDictAsync(ModelHistoryKey, backend, model);
     public Task<string?> GetLastModelForBackendAsync(string backend) => GetFromDictAsync(ModelHistoryKey, backend);
 
+    private const string BackendProfilesKey = "inferpage-backend-profiles";
+
+    public async Task SaveProfileForBackendAsync(string backend, string model,
+        bool vision, bool reasoning, bool imageGen)
+    {
+        var profiles = await js.InvokeAsync<Dictionary<string, BackendProfile>?>(
+            "settingsManager.load", BackendProfilesKey) ?? new();
+        profiles[backend] = new BackendProfile(model, vision, reasoning, imageGen);
+        await js.InvokeVoidAsync("settingsManager.save", BackendProfilesKey, profiles);
+    }
+
+    public async Task<BackendProfile?> GetProfileForBackendAsync(string backend)
+    {
+        var profiles = await js.InvokeAsync<Dictionary<string, BackendProfile>?>(
+            "settingsManager.load", BackendProfilesKey);
+        return profiles?.GetValueOrDefault(backend);
+    }
+
     private async Task SetInDictAsync(string storageKey, string key, string value)
     {
         var dict = await LoadDictAsync(storageKey);
@@ -36,3 +54,5 @@ private async Task SetInDictAsync(string storageKey, string key, string value)
     private async Task<Dictionary<string, string>> LoadDictAsync(string storageKey)
         => await js.InvokeAsync<Dictionary<string, string>?>("settingsManager.load", storageKey) ?? new();
 }
+
+public record BackendProfile(string Model, bool Vision, bool Reasoning, bool ImageGen);

src/MaIN.Services/Services/LLMService/DeepSeekService.cs

@@ -67,6 +67,7 @@ protected override void ValidateApiKey()
 
         chat.Messages.Last().Content = message.Content;
         chat.Messages.Last().Files = [];
+        chat.Messages.Last().Images = null;
         var result = await Send(chat, requestOptions, cancellationToken);
         chat.Messages.Last().Content = lastMsg.Content;
         return result;

src/MaIN.Services/Services/LLMService/OllamaService.cs

@@ -58,6 +58,7 @@ protected override void ValidateApiKey()
 
         chat.Messages.Last().Content = message.Content;
         chat.Messages.Last().Files = [];
+        chat.Messages.Last().Images = null;
         var result = await Send(chat, requestOptions, cancellationToken);
         chat.Messages.Last().Content = lastMsg.Content;
         return result;