fix(providers): strip provider prefix from model names for openai_compat endpoints

rust/crates/api/src/providers/mod.rs

@@ -296,6 +296,20 @@ pub fn metadata_for_model(model: &str) -> Option<ProviderMetadata> {
     None
 }
 
+
+
+
+#[must_use]
+pub fn strip_provider_prefix(canonical_model: &str) -> String {
+    if let Some(pos) = canonical_model.find('/') {
+        canonical_model[pos + 1..].to_string()
+    } else {
+        canonical_model.to_string()
+    }
+}
+
+
+
 #[must_use]
 pub fn provider_diagnostics_for_model(model: &str) -> ProviderDiagnostics {
     let resolved_model = resolve_model_alias(model);