feat: implement PI core chat timeline

src/lib/coding-projects.ts

@@ -0,0 +1,48 @@
+import { hostApiFetch } from './host-api';
+import type {
+  CodingConversationMetadata,
+  CodingProjectConfigSnapshot,
+  CodingProjectSummary,
+} from '@/types/coding-project';
+
+export interface CodingProjectCatalog {
+  projects: CodingProjectSummary[];
+  activeProjectId: string | null;
+}
+
+export async function listCodingProjects(): Promise<CodingProjectCatalog> {
+  return await hostApiFetch<CodingProjectCatalog>('/api/coding/projects');
+}
+
+export async function getCodingProjectConfig(
+  projectId: string,
+): Promise<CodingProjectConfigSnapshot> {
+  const response = await hostApiFetch<{ snapshot: CodingProjectConfigSnapshot }>(
+    `/api/coding/projects/config?projectId=${encodeURIComponent(projectId)}`,
+  );
+  return response.snapshot;
+}
+
+export async function listCodingProjectConversations(
+  projectId: string,
+): Promise<CodingConversationMetadata[]> {
+  const response = await hostApiFetch<{ conversations: CodingConversationMetadata[] }>(
+    `/api/coding/projects/conversations?projectId=${encodeURIComponent(projectId)}`,
+  );
+  return response.conversations;
+}
+
+export async function createCodingProjectConversation(input: {
+  projectId: string;
+  agentId: string;
+  title: string;
+}): Promise<CodingConversationMetadata> {
+  const response = await hostApiFetch<{ conversation: CodingConversationMetadata }>(
+    '/api/coding/projects/conversations',
+    {
+      method: 'POST',
+      body: JSON.stringify(input),
+    },
+  );
+  return response.conversation;
+}