feat: unify workspace sidebar and create Foundry graph pages

tests/workspace.test.mjs

@@ -1,6 +1,6 @@
 import { test } from "node:test";
 import assert from "node:assert/strict";
-import { createBoard, loadWorkspaceHome } from "../src/lib/workspace.ts";
+import { boardHref, createBoard, DEFAULT_BOARD_TITLE, loadWorkspaceHome } from "../src/lib/workspace.ts";
 
 test("profile and workspace reads both start before either completes", async () => {
   const calls = [];
@@ -80,3 +80,23 @@ test("an existing workspace posts a board directly", async () => {
   );
   assert.deepEqual(calls, ["workspaces/existing/materials"]);
 });
+
+
+test("new graphs use a default name and retain the Foundry-assigned identity", async () => {
+  const created = await createBoard(async (path, options) => {
+    assert.equal(path, "workspaces/space/materials");
+    assert.deepEqual(JSON.parse(options.body), {
+      kind: "board", title: DEFAULT_BOARD_TITLE, content: { schema_version: 1 },
+    });
+    return { id: "server-generated-id", workspace_id: "space", kind: "board", version: 1 };
+  }, "  ", "space", () => assert.fail("unexpected workspace creation"));
+  assert.equal(created.id, "server-generated-id");
+  assert.equal(created.workspace_id, "space");
+  assert.equal(created.title, "未命名图谱");
+  assert.equal(boardHref(created.workspace_id, created.id), "/dashboard/space/server-generated-id");
+});
+
+test("graph URLs preserve workspace identity and safely encode route segments", () => {
+  assert.equal(boardHref("space/a", "id?b"), "/dashboard/space%2Fa/id%3Fb");
+  assert.equal(boardHref("demo", "board", true), "/dashboard/demo/board?demo=1");
+});