feat: organize project conversations and add coding teacher side chat

electron/coding-teacher/source-reader.ts

@@ -0,0 +1,33 @@
+import type { CodingProjectService } from '../coding-projects/project-service';
+import type { CodingConversationRuntime } from '../coding-runtime/contracts';
+import { readCodingConversationHistory } from '../coding-projects/conversation-history';
+import { sourceContext } from './context';
+import { TeacherError } from './config-client';
+import type { TeacherSourceContext } from '../../shared/coding-teacher';
+
+export async function readTeacherSource(
+  projects: CodingProjectService,
+  runtime: CodingConversationRuntime,
+  userDataDir: string,
+  projectId: string,
+  sourceId: string
+): Promise<TeacherSourceContext> {
+  const project = await projects.getProject(projectId);
+  const conversation = await projects.conversationStore(project.path).get(sourceId);
+  if (!conversation) throw new TeacherError(404, 'teacher_source_not_found', '来源会话不存在。');
+  try {
+    const snapshot = await runtime.getSnapshot(sourceId);
+    if (snapshot.conversation.projectId === projectId) return sourceContext(snapshot);
+  } catch {
+    /* Cold history does not require a running worker. */
+  }
+  try {
+    return sourceContext(await readCodingConversationHistory(userDataDir, projectId, conversation));
+  } catch {
+    throw new TeacherError(
+      409,
+      'teacher_source_unreadable',
+      '暂时无法读取来源会话，请先打开该会话。'
+    );
+  }
+}