updating to use stable-diffusion.cpp for the image generation as ollama has since removed it

src-tauri/src/llm/mod.rs

@@ -31,8 +31,9 @@ pub struct LlmConfig {
     pub temperature: f32,
     pub max_tokens: u32,
     pub top_p: f32,
-    /// Ollama image-generation model (e.g. `x/flux2-klein:4b`). macOS-only via Ollama.
-    pub image_model: String,
+    /// Base URL of a stable-diffusion.cpp `sd-server` (A1111-compatible API),
+    /// e.g. `http://localhost:1234`. Cross-platform — no longer Ollama/macOS-only.
+    pub image_api_url: String,
     /// Ollama embedding model for lore RAG (e.g. `nomic-embed-text`).
     pub embed_model: String,
 }
@@ -47,7 +48,7 @@ impl Default for LlmConfig {
             temperature: 0.7,
             max_tokens: 512,
             top_p: 0.9,
-            image_model: "x/flux2-klein:4b".to_string(),
+            image_api_url: "http://localhost:1234".to_string(),
             embed_model: "nomic-embed-text".to_string(),
         }
     }