fix(chat): choose the chart person before the first message

frontend/src/lib/chat-profile-picker-model.ts

@@ -0,0 +1,141 @@
+import { isConsultationSubjectProfileComplete } from "@/lib/consultation-subject-resolver";
+import { chartRelationshipLabel, sessionChartLabel } from "@/lib/home-profile";
+import type { ChartLibraryRecord, ChatSession } from "@/lib/home-types";
+
+export type ChatProfileCatalogStatus = "idle" | "loading" | "ready" | "failed";
+
+/** New ordinary chats show self. They do not inherit the account's active chart. */
+export const NEW_CHAT_SUBJECT_ID = "self" as const;
+
+export type ChatProfileChoice =
+  | { readonly action: "bind"; readonly chartProfileId: string }
+  | { readonly action: "open-new"; readonly chartProfileId: string }
+  | { readonly action: "ignore" };
+
+export type ChatProfilePickerRow = {
+  readonly id: string;
+  readonly role: "self" | "other";
+  readonly name: string;
+  readonly detail: string;
+  readonly complete: boolean;
+  readonly selected: boolean;
+};
+
+type SubjectSession = Pick<ChatSession, "chartProfileId" | "chartProfileName" | "chartProfileRole" | "sessionType" | "messagesHydrated" | "messages">;
+
+export function chatSessionSubjectLocked(session: {
+  sessionType: string;
+  messagesHydrated: boolean;
+  messages: readonly unknown[];
+}): boolean {
+  if (session.sessionType !== "consultation") return true;
+  if (!session.messagesHydrated) return true;
+  return session.messages.length > 0;
+}
+
+export function chatProfileSelectedId(session: Pick<ChatSession, "chartProfileId" | "chartProfileRole">): string {
+  if (session.chartProfileRole === "other" || (session.chartProfileId && session.chartProfileId !== "self")) {
+    return session.chartProfileId ?? "";
+  }
+  return "self";
+}
+
+export function chatProfileDisplayName(input: {
+  session: Pick<ChatSession, "chartProfileId" | "chartProfileName" | "chartProfileRole">;
+  status: ChatProfileCatalogStatus;
+  library: readonly ChartLibraryRecord[];
+}): string {
+  if (input.status !== "ready") {
+    const snapshot = input.session.chartProfileName?.trim();
+    if (snapshot) return snapshot;
+    if (!input.session.chartProfileId || input.session.chartProfileId === "self" || input.session.chartProfileRole !== "other") {
+      return "我";
+    }
+    return "未命名资料";
+  }
+  return sessionChartLabel(input.session, input.library);
+}
+
+export function chatSubjectSendBlocked(input: {
+  session: Pick<ChatSession, "sessionType" | "chartProfileId" | "chartProfileRole"> | undefined;
+  status: ChatProfileCatalogStatus;
+  library: readonly ChartLibraryRecord[];
+}): boolean {
+  if (!input.session || input.session.sessionType !== "consultation") return false;
+  if (input.status !== "ready") return false;
+  const id = input.session.chartProfileId;
+  if (!id || id === "self" || input.session.chartProfileRole === "self") return false;
+  return !input.library.some((record) => record.id === id && record.role === "other");
+}
+
+function rowName(record: ChartLibraryRecord): string {
+  return record.profile.name.trim() || (record.role === "self" ? "我" : "未命名资料");
+}
+
+export function chatProfilePickerRows(input: {
+  status: ChatProfileCatalogStatus;
+  library: readonly ChartLibraryRecord[];
+  selectedId: string;
+}): ChatProfilePickerRow[] {
+  if (input.status !== "ready") return [];
+  const self = input.library.find((record) => record.role === "self" || record.id === "self");
+  const others = input.library.filter((record) => record.role === "other" && record.id !== "self");
+  const rows: ChatProfilePickerRow[] = [];
+  if (self) rows.push(toRow(self, input.selectedId));
+  else {
+    rows.push({
+      id: "self",
+      role: "self",
+      name: "我",
+      detail: "这份资料还不完整",
+      complete: false,
+      selected: input.selectedId === "self",
+    });
+  }
+  for (const record of others) rows.push(toRow(record, input.selectedId));
+  return rows;
+}
+
+function toRow(record: ChartLibraryRecord, selectedId: string): ChatProfilePickerRow {
+  const complete = isConsultationSubjectProfileComplete(record.profile);
+  const id = record.role === "self" ? "self" : record.id;
+  return {
+    id,
+    role: record.role,
+    name: rowName(record),
+    detail: complete
+      ? (record.role === "self" ? "本人" : chartRelationshipLabel(record.relationship))
+      : "这份资料还不完整",
+    complete,
+    selected: id === selectedId,
+  };
+}
+
+export function chatProfileChoice(input: {
+  session: Pick<SubjectSession, "sessionType" | "messagesHydrated" | "messages" | "chartProfileId">;
+  chartProfileId: string;
+  requestInFlight: boolean;
+  libraryReady: boolean;
+  selectable: boolean;
+}): ChatProfileChoice {
+  if (!input.libraryReady || !input.selectable || !input.chartProfileId) return { action: "ignore" };
+  if (input.session.sessionType !== "consultation") return { action: "ignore" };
+  if (chatSessionSubjectLocked(input.session)) {
+    if (input.chartProfileId === (input.session.chartProfileId || "self")) return { action: "ignore" };
+    if (input.requestInFlight) return { action: "ignore" };
+    return { action: "open-new", chartProfileId: input.chartProfileId };
+  }
+  if (input.chartProfileId === input.session.chartProfileId) return { action: "ignore" };
+  return { action: "bind", chartProfileId: input.chartProfileId };
+}
+
+/** Empty-session PATCH body. The server fills the name; the client does not send one. */
+export function emptySessionBindingWrite(chartProfileId: string, role: "self" | "other"): {
+  chart_profile_id: string;
+  chart_profile_role: "self" | "other";
+} {
+  return {
+    chart_profile_id: role === "self" ? "self" : chartProfileId,
+    chart_profile_role: role,
+  };
+}

frontend/src/lib/consultation-subject-resolver.ts

@@ -149,6 +149,12 @@ function otherProfileComplete(row: Record<string, unknown>): boolean {
   return Boolean(name && birthDate && source && status && latitude && longitude && label && (timezoneOffset || timezoneId));
 }
 
+/** Same completeness gate the resolver uses before it will bind a person. */
+export function isConsultationSubjectProfileComplete(profile: unknown): boolean {
+  const row = chartProfileToConsultationRow(profile);
+  return Boolean(row && otherProfileComplete(row));
+}
+
 export function consultationSubjectBindingFromSession(row: {
   chart_profile_id?: unknown;
   chart_profile_name?: unknown;

frontend/src/lib/home-profile.ts

@@ -97,11 +97,20 @@ export function chartSnapshotForSession(
   return { chartProfileId: chartId || null, chartProfileName: "未命名资料", chartProfileRole: chartId ? "other" : null };
 }
 
-export function sessionChartLabel(session: ChatSession, library: readonly ChartLibraryRecord[]) {
+export function sessionChartLabel(
+  session: Pick<ChatSession, "chartProfileId" | "chartProfileName" | "chartProfileRole">,
+  library: readonly ChartLibraryRecord[],
+) {
   if (!session.chartProfileId) return "未关联资料";
-  const current = session.chartProfileId === "self" || library.some((record) => record.id === session.chartProfileId);
-  const name = session.chartProfileName?.trim() || (session.chartProfileRole === "self" ? "我" : "未命名资料");
-  return current ? name : `资料已删除 · ${name}`;
+  const record = session.chartProfileId === "self"
+    ? library.find((item) => item.id === "self" || item.role === "self")
+    : library.find((item) => item.id === session.chartProfileId && item.role === "other");
+  if (record) {
+    return record.profile.name.trim() || (record.role === "self" ? "我" : "未命名资料");
+  }
+  if (session.chartProfileId === "self") return session.chartProfileName?.trim() || "我";
+  const name = session.chartProfileName?.trim() || "未命名资料";
+  return `资料已删除 · ${name}`;
 }
 
 export function upsertSelfChart(library: ChartLibraryRecord[], profile: Profile) {

frontend/src/lib/rectification-session-composer-guard.ts

@@ -61,8 +61,10 @@ export function ordinaryComposerPlaceholder(input: {
   onboardingName: boolean;
   presetMessageFinished: boolean;
   creditsEmpty: boolean;
+  subjectDeleted?: boolean;
 }): string {
   if (input.locked) return RECTIFICATION_OPENING_COMPOSER_PLACEHOLDER;
+  if (input.subjectDeleted) return "这份资料已经删除，这段对话只能看";
   if (!input.hasAccount) return "正在读取账户…";
   if (!input.profileComplete) {
     if (!input.onboardingName) return "请先完成上方资料";