fix(web): 四个页面共用一份会话列表，空会话不入列

对话、星盘、星历、报告进同一 (app) 外壳，列表只拉一次。服务端不再列出空咨询；新建复用已有空会话。新标题改成「生时校正 · M月D日」，侧栏副标题用创建时间。

frontend/tests/rectification-session-composer-guard.test.ts

@@ -17,7 +17,7 @@ const read = (relativePath: string) => readFileSync(new URL(relativePath, import
 const run = read("../src/hooks/use-consultation-run.ts");
 const sessions = read("../src/hooks/use-session-management.ts");
 const consultRoute = read("../src/app/api/consult/route.ts");
-const pageSource = read("../src/app/page.tsx");
+const pageSource = read("../src/app/(app)/page.tsx");
 const sendFn = run.slice(run.indexOf("async function send("), run.indexOf('await fetch("/api/consult"'));
 
 test("a rectification session blocks consult send and keeps the draft", () => {