feat(ollama): enhance model pull with improved error handling, persistence, and UI

- Add catalog metadata lookup for better error messages with hints (e.g., for missing manifests or tags)
- Persist downloaded model references in saved remote models for future reuse
- Replace searchRemoteModels import with getSavedRemoteModels in search route
- Enhance pull progress UI to display download bytes, digest, and fallback message when data is unavailable
- Improve error payload with model details, URL, and tags count to guide users toward valid tags or models

lib/services/mcp-validator.ts

@@ -46,6 +46,7 @@ export class MCPValidatorService {
           cwd: environment.path, // Executar do diretório de instalação
           env,
           stdio: ["pipe", "pipe", "pipe"],
+          shell: process.platform === "win32", // Workaround para *.cmd no Windows
         });
 
         let stdout = "";
@@ -250,6 +251,7 @@ export class MCPValidatorService {
           cwd: environment.path, // Executar do diretório de instalação
           env,
           stdio: ["pipe", "pipe", "pipe"],
+          shell: process.platform === "win32",
         });
 
         let hasResolved = false;