fix(agent): skip tools for models without tool-call capability and parse image output

- Add SupportsToolCall to RunConfig; only inject tools into SDK when set
- Update twilight-ai to 497ad09 which adds SSE scanner 10MB buffer
  (fixes token-too-long on large image payloads) and parses the images
  array from OpenAI-compatible chat completions into StreamFilePart

internal/conversation/flow/resolver.go

@@ -274,6 +274,7 @@ func (r *Resolver) resolve(ctx context.Context, req conversation.ChatRequest) (r
 		Messages:           sdkMessages,
 		Query:              headerifiedQuery,
 		SupportsImageInput: chatModel.HasCompatibility(models.CompatVision),
+		SupportsToolCall:   chatModel.HasCompatibility(models.CompatToolCall),
 		InlineImages:       inlineImages,
 		Identity: agentpkg.SessionContext{
 			BotID:             req.BotID,