fix: clean up OAuth token cache on provider deletion (#7908)

Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

crates/goose-server/src/openapi.rs

@@ -408,6 +408,7 @@ derive_utoipa!(Icon as IconSchema);
         super::routes::config_management::remove_custom_provider,
         super::routes::config_management::get_provider_catalog,
         super::routes::config_management::get_provider_catalog_template,
+        super::routes::config_management::cleanup_provider_cache,
         super::routes::config_management::check_provider,
         super::routes::config_management::set_config_provider,
         super::routes::config_management::configure_provider_oauth,

crates/goose-server/src/routes/config_management.rs

@@ -710,6 +710,24 @@ pub async fn remove_custom_provider(Path(id): Path<String>) -> Result<Json<Strin
     Ok(Json(format!("Removed custom provider: {}", id)))
 }
 
+#[utoipa::path(
+    post,
+    path = "/config/providers/{name}/cleanup",
+    params(
+        ("name" = String, Path, description = "Provider name (e.g., githubcopilot)")
+    ),
+    responses(
+        (status = 200, description = "Provider cache cleaned up successfully", body = String),
+        (status = 500, description = "Internal server error")
+    )
+)]
+pub async fn cleanup_provider_cache(
+    Path(name): Path<String>,
+) -> Result<Json<String>, ErrorResponse> {
+    goose::providers::cleanup_provider(&name).await?;
+    Ok(Json(format!("Cleaned up provider cache: {}", name)))
+}
+
 #[utoipa::path(
     put,
     path = "/config/custom-providers/{id}",
@@ -908,6 +926,10 @@ pub fn routes(state: Arc<AppState>) -> Router {
             "/config/provider-catalog/{id}",
             get(get_provider_catalog_template),
         )
+        .route(
+            "/config/providers/{name}/cleanup",
+            post(cleanup_provider_cache),
+        )
         .route("/config/detect-provider", post(detect_provider))
         .route("/config/slash_commands", get(get_slash_commands))
         .route(