Fix tool call results not reaching client - return actual service result in SSE HTTP response

- SSE handler was returning generic status message instead of actual service result
- Extract actualResult from service response (same as regular HTTP handler)
- Tool calls now return proper content including screen execution results
- Fixes issue where tools worked but results didn't reach opencode client

@@ -537,7 +537,9 @@ try {
             response.writer.write(JsonOutput.toJson([
             response.writer.write(JsonOutput.toJson([
                 jsonrpc: "2.0",
                 jsonrpc: "2.0",
                 id: rpcRequest.id,
                 id: rpcRequest.id,
-                result: [status: "processed", sessionId: sessionId, architecture: "Visit-based"]
+                // Extract actual result from service response (same as regular handler)
+                def actualResult = result?.result ?: result
+                result: actualResult
             ]))
             ]))
             
             
         } catch (Exception e) {
         } catch (Exception e) {