fix: use live copilot model availability

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/shared/contracts/channels.ts

@@ -1,4 +1,5 @@
 export const ipcChannels = {
+  describeSidecarCapabilities: 'sidecar:describe-capabilities',
   loadWorkspace: 'workspace:load',
   addProject: 'workspace:add-project',
   removeProject: 'workspace:remove-project',

src/shared/contracts/ipc.ts

@@ -1,3 +1,4 @@
+import type { SidecarCapabilities } from '@shared/contracts/sidecar';
 import type { PatternDefinition, ReasoningEffort } from '@shared/domain/pattern';
 import type { ProjectRecord } from '@shared/domain/project';
 import type { SessionEventRecord } from '@shared/domain/event';
@@ -20,10 +21,11 @@ export interface SendSessionMessageInput {
 export interface UpdateScratchpadSessionConfigInput {
   sessionId: string;
   model: string;
-  reasoningEffort: ReasoningEffort;
+  reasoningEffort?: ReasoningEffort;
 }
 
 export interface ElectronApi {
+  describeSidecarCapabilities(): Promise<SidecarCapabilities>;
   loadWorkspace(): Promise<WorkspaceState>;
   addProject(): Promise<WorkspaceState>;
   removeProject(projectId: string): Promise<WorkspaceState>;

src/shared/contracts/sidecar.ts

@@ -1,4 +1,4 @@
-import type { PatternDefinition, PatternValidationIssue } from '@shared/domain/pattern';
+import type { PatternDefinition, PatternValidationIssue, ReasoningEffort } from '@shared/domain/pattern';
 import type { ChatMessageRecord } from '@shared/domain/session';
 
 export interface SidecarModeCapability {
@@ -6,9 +6,17 @@ export interface SidecarModeCapability {
   reason?: string;
 }
 
+export interface SidecarModelCapability {
+  id: string;
+  name: string;
+  supportedReasoningEfforts?: ReasoningEffort[];
+  defaultReasoningEffort?: ReasoningEffort;
+}
+
 export interface SidecarCapabilities {
   runtime: 'dotnet-maf';
   modes: Record<PatternDefinition['mode'], SidecarModeCapability>;
+  models: SidecarModelCapability[];
 }
 
 export interface DescribeCapabilitiesCommand {