feat: default new Codex agents to the qualified Paperclip Runner

Resolve creation intent across onboarding, hires, imports, and the UI. Preserve existing execution and qualify automatic defaults for shipped Linux x64 artifacts.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

ui/src/api/adapters.ts

@@ -34,6 +34,8 @@ export interface AcpTargetDescriptor {
 }
 
 export interface AdapterInfo {
+  supportedRunners?: import("@paperclipai/shared").AgentRunner[];
+  defaultRunner?: import("@paperclipai/shared").AgentRunner;
   type: string;
   label: string;
   source: "builtin" | "external";

ui/src/api/agents.ts

@@ -252,6 +252,7 @@ export const agentsApi = {
     type: string,
     data: {
       adapterConfig: Record<string, unknown>;
+      runner?: import("@paperclipai/shared").AgentRunnerChoice;
       aiConnection?: import("@paperclipai/shared").AiRuntimeConnectionBinding;
       agentId?: string;
       testCredentials?: Record<string, string>;

ui/src/api/builtInAgents.ts

@@ -108,6 +108,7 @@ export interface BuiltInAgentState {
 }
 
 export interface BuiltInAgentProvisionInput {
+  runner?: import("@paperclipai/shared").AgentRunnerChoice;
   adapterType?: string;
   adapterConfig?: Record<string, unknown>;
   budgetMonthlyCents?: number;