fix: add /think and /no-think added to API to run with ollama

backend/internal/ai/ollama.go

@@ -31,13 +31,18 @@ func newOllama(endpoint, model string) *ollamaProvider {
 
 func (p *ollamaProvider) Name() string { return "ollama" }
 
-func (p *ollamaProvider) Summarize(ctx context.Context, prompt string) (string, error) {
+func (p *ollamaProvider) Summarize(ctx context.Context, prompt string, opts GenOptions) (string, error) {
+	numCtx := 32768
+	if opts.NumCtx > 0 {
+		numCtx = opts.NumCtx
+	}
 	body := map[string]interface{}{
 		"model":  p.model,
 		"prompt": prompt,
 		"stream": false,
+		"think":  opts.Think,
 		"options": map[string]interface{}{
-			"num_ctx": 32768,
+			"num_ctx": numCtx,
 		},
 	}
 	b, _ := json.Marshal(body)