refactor: 'Repo' 접두 타입·헬퍼 식별자를 'Project' 로 일괄 rename

저장소 기능 제거 후 남은 레거시 'Repo' 명칭을 프로젝트 의미에 맞게 정리(동작 변화 없음):
- 타입: ApiRepoMember→ApiProjectMember, ApiRepoTask→ApiProjectTask,
  ApiRepoTaskListResult→ApiProjectTaskListResult, RepoTask(View)→ProjectTask(View),
  RepoMember(Response)→ProjectMember(Response), RepoActivityItem/Day→ProjectActivityItem/Day,
  RepoTaskResponse/ListResult→ProjectTaskResponse/ListResult (백엔드 task.service 포함)
- 헬퍼: toRepoTaskView→toProjectTaskView, toRepoActivityItem→toProjectActivityItem,
  loadRepo→loadProject, filteredRepos→filteredProjects, removeRepo→removeProject
- 백엔드 spec mock repoRepo→projectRepo, 잔존 RepoDetailPage/저장소(Repo) 주석 정리

검증: 백엔드 build/lint 0·8 tests, 프론트 type-check/lint/build 0 (식별자 충돌 없음).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/composables/useMember.ts

@@ -1,6 +1,6 @@
 import { useApi } from './useApi'
 import type {
-  ApiRepoMember,
+  ApiProjectMember,
   InviteMemberPayload,
   UpdateMemberPayload,
 } from '@/types/member'
@@ -16,21 +16,21 @@ export function useMember() {
     projectId: string,
     page = 1,
     size = 20,
-  ): Promise<Paginated<ApiRepoMember>> {
+  ): Promise<Paginated<ApiProjectMember>> {
     return (await api.get(`/projects/${projectId}/members`, {
       params: { page, size },
-    })) as unknown as Paginated<ApiRepoMember>
+    })) as unknown as Paginated<ApiProjectMember>
   }
 
   // 멤버 초대 (admin) — 가입된 사용자만 이메일로 초대
   async function invite(
     projectId: string,
     payload: InviteMemberPayload,
-  ): Promise<ApiRepoMember> {
+  ): Promise<ApiProjectMember> {
     return (await api.post(
       `/projects/${projectId}/members`,
       payload,
-    )) as unknown as ApiRepoMember
+    )) as unknown as ApiProjectMember
   }
 
   // 멤버 역할/직무 변경 (admin, owner 제외)
@@ -38,11 +38,11 @@ export function useMember() {
     projectId: string,
     userId: string,
     payload: UpdateMemberPayload,
-  ): Promise<ApiRepoMember> {
+  ): Promise<ApiProjectMember> {
     return (await api.patch(
       `/projects/${projectId}/members/${userId}`,
       payload,
-    )) as unknown as ApiRepoMember
+    )) as unknown as ApiProjectMember
   }
 
   // 멤버 제거 (admin, owner 제외)

frontend/src/composables/useMyTask.ts

@@ -2,7 +2,7 @@ import { useApi } from './useApi'
 import type { ApiMyTaskRow } from '@/types/my-task'
 import type { Paginated } from '@/types/pagination'
 
-// 내 업무 API Composable — 저장소 횡단 집계(담당/지시), 오프셋 페이지네이션
+// 내 업무 API Composable — 프로젝트 횡단 집계(담당/지시), 오프셋 페이지네이션
 export function useMyTask() {
   const api = useApi()
 

frontend/src/composables/useTask.ts

@@ -3,7 +3,7 @@ import type {
   ApiAttachment,
   ApiComment,
   ApiCommentReply,
-  ApiRepoTaskListResult,
+  ApiProjectTaskListResult,
   ApiTaskDetail,
   CreateTaskPayload,
   TaskListQuery,
@@ -23,10 +23,10 @@ export function useTask() {
     query: TaskListQuery = {},
     page = 1,
     size = DEFAULT_PAGE_SIZE,
-  ): Promise<ApiRepoTaskListResult> {
+  ): Promise<ApiProjectTaskListResult> {
     return (await api.get(`/projects/${projectId}/tasks`, {
       params: { ...query, page, size },
-    })) as unknown as ApiRepoTaskListResult
+    })) as unknown as ApiProjectTaskListResult
   }
 
   // 업무 단건 상세 (taskId = 프로젝트 내 순번)