feat(grades): gpa formula system - linear per-band gp (start~top), course category weights (editable), formula display, seed aligned to school standard

app/src/lib/api.ts

@@ -123,7 +123,7 @@ export const gradesOverview = () => call<GradesOverview>('grades_overview');
 export const semesterUpsert = (p: { id?: number; term: string; gpa?: number | null; rank?: number | null; total_students?: number | null }) =>
   call<{ item: { id: number } }>('semester_upsert', p);
 export const semesterDelete = (id: number) => call<{ ok: true }>('semester_delete', { id });
-export const courseUpsert = (p: { id?: number; semester_id: number; course_name: string; credit: number; score?: number | null; grade_point?: number | null }) =>
+export const courseUpsert = (p: { id?: number; semester_id: number; course_name: string; credit: number; score?: number | null; grade_point?: number | null; category?: string | null }) =>
   call<{ item: { id: number } }>('course_upsert', p);
 export const courseDelete = (id: number) => call<{ ok: true }>('course_delete', { id });
 export const bandUpsert = (p: GradeBand) => call<{ item: { id: number } }>('band_upsert', p);
@@ -218,6 +218,10 @@ export const adminDeleteUser = (userId: number | string, baseUrl?: string) =>
 export const adminDeleteInvite = (id: number, baseUrl?: string) =>
   adminCall<{ deleted: number }>('/admin/invites/delete', { id }, baseUrl);
 
+// ---- 绩点公式设置 ----
+export const gpaSettingsGet = () => call<{ weights: Record<string, number> }>('gpa_settings_get', {});
+export const gpaSettingsUpsert = (weights: Record<string, number>) => call<{ ok: true; weights: Record<string, number> }>('gpa_settings_upsert', { weights });
+
 // ---- 个人信息 / 简历 ----
 export const profileGet = () => call<{ content: { info?: Partial<ProfileInfo>; resume?: ResumeConfig } }>('profile_get', {});
 export const profileUpsert = (content: { info?: Partial<ProfileInfo>; resume?: ResumeConfig }) =>