Drop redundant prompt-builder.ts re-export shim

src/main/orchestration/turn-context.ts

@@ -6,7 +6,7 @@
  * prompt) is an isolated helper, making the pipeline testable and extensible.
  */
 
-import { buildTaskPrompt } from "../prompt-builder";
+import { buildTaskPrompt } from "../prompt-builder/index";
 import type { AppDatabase } from "../database";
 import type { ProjectedSkill } from "../skill-types";
 import type { ConnectorId, ExecutionMode } from "@shared/types";

src/main/prompt-builder.ts

@@ -1,2 +0,0 @@
-export { buildTaskPrompt } from "./prompt-builder/index";
-export { buildSystemPrompt } from "./prompt-builder/system-prompt";

src/main/prompt-builder/index.ts

@@ -5,6 +5,8 @@ import { buildSystemPrompt } from "./system-prompt";
 import { renderWakeReason } from "./wake-reasons";
 import { getSystemMessages } from "./messages";
 
+export { buildSystemPrompt } from "./system-prompt";
+
 export interface PromptContext {
   agent: AgentRecord;
   apiUrl: string;