feat: improve app ui and project metadata

apps/web/lib/foreshadow/board.test.ts

@@ -4,9 +4,12 @@ import type { ForeshadowView } from "@/lib/api/types";
 import {
   buildRegisterRequest,
   buildTransitionRequest,
+  countByStatus,
   extractReason,
   groupByStatus,
   isWindowApproaching,
+  LANE_LABELS,
+  nextFreeForeshadowCode,
   suggestForeshadowCode,
   validationReasonMessage,
 } from "./board";
@@ -24,6 +27,24 @@ describe("suggestForeshadowCode", () => {
   });
 });
 
+describe("nextFreeForeshadowCode", () => {
+  it("keeps the preferred code when it is free", () => {
+    expect(nextFreeForeshadowCode("FS-04", new Set(["FS-01", "FS-02"]))).toBe(
+      "FS-04",
+    );
+  });
+
+  it("skips taken codes and returns the first free FS-NN", () => {
+    const taken = new Set(["FS-01", "FS-02", "FS-03", "FS-05", "FS-OLD"]);
+    // preferred FS-01 已占 → 取首个空闲 FS-04
+    expect(nextFreeForeshadowCode("FS-01", taken)).toBe("FS-04");
+  });
+
+  it("returns FS-01 when nothing is taken", () => {
+    expect(nextFreeForeshadowCode("FS-01", new Set())).toBe("FS-01");
+  });
+});
+
 const view = (over: Partial<ForeshadowView>): ForeshadowView => ({
   code: "F-001",
   title: "线索",
@@ -53,6 +74,32 @@ describe("groupByStatus", () => {
   });
 });
 
+describe("countByStatus", () => {
+  it("counts items in the same lane model used by the board", () => {
+    expect(
+      countByStatus([
+        view({ status: "OPEN" }),
+        view({ status: "OPEN" }),
+        view({ status: "PARTIAL" }),
+        view({ status: "CLOSED" }),
+        view({ status: "OVERDUE" }),
+        view({ status: "WEIRD" }),
+      ]),
+    ).toEqual({ OPEN: 3, PARTIAL: 1, CLOSED: 1, OVERDUE: 1 });
+  });
+});
+
+describe("LANE_LABELS", () => {
+  it("keeps author-facing labels distinct from status codes", () => {
+    expect(LANE_LABELS).toEqual({
+      OPEN: "待推进",
+      PARTIAL: "推进中",
+      CLOSED: "已回收",
+      OVERDUE: "已逾期",
+    });
+  });
+});
+
 describe("isWindowApproaching", () => {
   it("is true when current chapter is inside [from,to] for OPEN/PARTIAL", () => {
     const f = view({