test: migrated test imports to package subpath exports

- Replaced relative `../src` imports with `@oh-my-pi/pi-ai` and `@oh-my-pi/pi-agent-core` subpaths.

packages/coding-agent/test/commit-shared-llm.test.ts

@@ -1,6 +1,9 @@
 import { describe, expect, it } from "bun:test";
 import type { AssistantMessage } from "@oh-my-pi/pi-ai";
-import { createConventionalAnalysisTool, parseConventionalAnalysisResponse } from "../src/commit/shared-llm";
+import {
+	createConventionalAnalysisTool,
+	parseConventionalAnalysisResponse,
+} from "@oh-my-pi/pi-coding-agent/commit/shared-llm";
 
 describe("commit shared LLM parsing", () => {
 	it("ignores harmless extra fields in conventional analysis tool output", () => {