feat(core): improve byok editing (#15427)

fix #14287
fix #15359
fix #15424

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Redesigned workspace AI provider settings with connection testing,
storage options, model selection, capability management, ordering, and
custom endpoints.
* AI chat model choices now adapt to the selected workspace and
conversation route.
  * Added support for image-based AI requests.
* **Bug Fixes**
  * Improved handling of unavailable or outdated model selections.
* App configuration updates now reject overlapping paths and load
deterministically.
* **Tests**
* Expanded coverage for provider models, AI chat scoping, image
requests, and configuration validation.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/copilot/runtime/capability-runtime.ts

@@ -398,13 +398,13 @@ export class CapabilityRuntime {
     _filter?: ProviderFilter,
     slot = 'image.generate'
   ): AsyncIterableIterator<NativeImageArtifact> {
-    const { quality, seed } = options;
+    const { quality, seed, modelName, loras } = options;
     const result = (await this.execute(
       slot,
       buildLlmImageRequestFromMessages({
         model: 'route-selected',
         messages: preparePromptMessagesForNativeRequest(messages, true),
-        options: { quality, seed },
+        options: { quality, seed, modelName, loras },
       }),
       cond,
       options