fix(frontend): streamline birth time onboarding

frontend/src/app/api/sessions/[id]/route.ts

@@ -1,9 +1,36 @@
 import { NextResponse } from "next/server";
 import { createServerSupabaseClient } from "@/lib/supabase/server";
 import { isSupabaseConfigurationError } from "@/lib/supabase/config";
+import { chatSessionWriteSchema } from "@/lib/chat-session-write-contract";
 
 type RouteContext = { params: Promise<{ id: string }> };
 
+export async function PATCH(request: Request, context: RouteContext) {
+  try {
+    const { id } = await context.params;
+    const parsed = chatSessionWriteSchema.safeParse(await request.json().catch(() => null));
+    if (!parsed.success) return NextResponse.json({ error: "聊天记录格式不正确" }, { status: 400 });
+    const supabase = await createServerSupabaseClient();
+    const { data: { user }, error: authError } = await supabase.auth.getUser();
+    if (authError || !user) return NextResponse.json({ error: "请先登录" }, { status: 401 });
+    const { data, error } = await supabase
+      .from("chat_sessions")
+      .update(parsed.data)
+      .eq("id", id)
+      .eq("user_id", user.id)
+      .select("id")
+      .maybeSingle();
+    if (error) return NextResponse.json({ error: "聊天记录暂时无法同步" }, { status: 500 });
+    if (!data) return NextResponse.json({ error: "聊天记录不存在或已被删除" }, { status: 404 });
+    return NextResponse.json({ ok: true });
+  } catch (error) {
+    if (isSupabaseConfigurationError(error)) {
+      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+    }
+    return NextResponse.json({ error: "聊天记录暂时无法同步" }, { status: 500 });
+  }
+}
+
 export async function DELETE(_request: Request, context: RouteContext) {
   try {
     const { id } = await context.params;

frontend/src/app/api/sessions/route.ts

@@ -0,0 +1,27 @@
+import { NextResponse } from "next/server";
+import { chatSessionCreateSchema } from "@/lib/chat-session-write-contract";
+import { isSupabaseConfigurationError } from "@/lib/supabase/config";
+import { createServerSupabaseClient } from "@/lib/supabase/server";
+
+export async function POST(request: Request) {
+  try {
+    const supabase = await createServerSupabaseClient();
+    const { data: { user }, error: authError } = await supabase.auth.getUser();
+    if (authError || !user) return NextResponse.json({ error: "请先登录" }, { status: 401 });
+    const parsed = chatSessionCreateSchema.safeParse(await request.json().catch(() => null));
+    if (!parsed.success) return NextResponse.json({ error: "聊天记录格式不正确" }, { status: 400 });
+    const { id, ...values } = parsed.data;
+    const { error } = await supabase.from("chat_sessions").insert({
+      id,
+      user_id: user.id,
+      ...values,
+    });
+    if (error) return NextResponse.json({ error: "聊天记录暂时无法同步" }, { status: 500 });
+    return NextResponse.json({ ok: true }, { status: 201 });
+  } catch (error) {
+    if (isSupabaseConfigurationError(error)) {
+      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+    }
+    return NextResponse.json({ error: "聊天记录暂时无法同步" }, { status: 500 });
+  }
+}