fix: add PermissionsContainer initialization for deno_fetch

The init_web extension now properly initializes deno_permissions::PermissionsContainer
when it's not already present. This is required by deno_fetch operations.

Fixes panic in web_features example and any code using fetch.

Author: chaizhenhua

src/ext/web/mod.rs

@@ -113,7 +113,14 @@ extension!(
     options = {
         permissions: Arc<dyn WebPermissions>
     },
-    state = |state, config| state.put(PermissionsContainer(config.permissions)),
+    state = |state, config| {
+        state.put(PermissionsContainer(config.permissions));
+        if !state.has::<deno_permissions::PermissionsContainer>() {
+            let parser = Arc::new(deno_permissions::RuntimePermissionDescriptorParser::new(sys_traits::impls::RealSys));
+            let permissions = deno_permissions::PermissionsContainer::allow_all(parser);
+            state.put(permissions);
+        }
+    },
 );
 impl ExtensionTrait<WebOptions> for init_web {
     fn init(options: WebOptions) -> Extension {