feat(web,server): unify nav naming, panel width and the update entry (#130)

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

packages/web/test/panel-task-scope.test.ts

@@ -1,10 +1,11 @@
 /**
- * advancePanelTaskScope unit tests: the subagents panel's TASK-SCOPED visibility rules —
- * entering a session and every new Task close the panel by default; the current task's first
- * live spawn auto-opens it (one attempt per task, so a manual close afterwards is respected
- * until the next boundary); a taskCount decrease is a defensive re-baseline, never a boundary.
- * The chat page feeds observations per render (session id + taskStartCount + live-spawn flag)
- * and applies the returned action under its own layout guards.
+ * advancePanelTaskScope unit tests: the subagents panel's AUTO-OPEN rule — the current task's
+ * first live spawn opens the panel once, re-armed at every boundary (Session switch or new
+ * Task) so a manual close is respected until the next one; boundaries themselves never close
+ * the panel (an open panel survives a switch, like the Files panel); a taskCount decrease is a
+ * defensive re-baseline that consumes the attempt instead of arming it. The chat page feeds
+ * observations per render (session id + taskStartCount + live-spawn flag) and applies the
+ * returned action under its own layout guards.
  */
 import { describe, expect, it } from "vitest";
 import {
@@ -18,36 +19,35 @@ const obs = (sessionId: string | null, taskCount: number, liveSpawn = false) =>
   liveSpawn,
 });
 
-describe("advancePanelTaskScope (task-scoped panel visibility)", () => {
-  it("entering a session closes by default; a mid-run entry with a live spawn auto-opens instead", () => {
+describe("advancePanelTaskScope (subagents panel auto-open)", () => {
+  it("entering a session does nothing on its own; a mid-run entry with a live spawn auto-opens", () => {
     const s = createPanelTaskScope();
-    expect(advancePanelTaskScope(s, obs("A", 3))).toBe("close");
+    expect(advancePanelTaskScope(s, obs("A", 3))).toBeNull();
     const mid = createPanelTaskScope();
     expect(advancePanelTaskScope(mid, obs("A", 3, true))).toBe("autoOpen");
   });
 
-  it("a new Task closes the panel and RE-ARMS the auto-open; the task's own spawn then opens it once", () => {
+  it("a new Task RE-ARMS the auto-open without closing; the task's own spawn then opens it once", () => {
     const s = createPanelTaskScope();
     advancePanelTaskScope(s, obs("A", 1)); // session entry
     expect(advancePanelTaskScope(s, obs("A", 1, true))).toBe("autoOpen"); // task 1 spawns
     expect(advancePanelTaskScope(s, obs("A", 1, true))).toBeNull(); // once per task
-    expect(advancePanelTaskScope(s, obs("A", 2))).toBe("close"); // task 2 boundary
-    expect(advancePanelTaskScope(s, obs("A", 2))).toBeNull(); // the boundary fires once
+    expect(advancePanelTaskScope(s, obs("A", 2))).toBeNull(); // task 2 boundary: no close
     expect(advancePanelTaskScope(s, obs("A", 2, true))).toBe("autoOpen"); // re-armed for task 2
     // Consumed again: a manual close mid-task stays respected until the next boundary.
     expect(advancePanelTaskScope(s, obs("A", 2, true))).toBeNull();
   });
 
-  it("a boundary arriving together with the new task's spawn opens rather than closing (batched commit)", () => {
+  it("a boundary arriving together with the new task's spawn opens in the same observation", () => {
     const s = createPanelTaskScope();
     advancePanelTaskScope(s, obs("A", 1));
     expect(advancePanelTaskScope(s, obs("A", 2, true))).toBe("autoOpen");
   });
 
-  it("a session switch resets the per-task guard", () => {
+  it("a session switch resets the per-task guard but leaves visibility alone", () => {
     const s = createPanelTaskScope();
     expect(advancePanelTaskScope(s, obs("A", 1, true))).toBe("autoOpen"); // consumed for A's task 1
-    expect(advancePanelTaskScope(s, obs("B", 1))).toBe("close"); // B is entered closed
+    expect(advancePanelTaskScope(s, obs("B", 1))).toBeNull(); // B inherits the open state
     expect(advancePanelTaskScope(s, obs("B", 1, true))).toBe("autoOpen"); // B's task 1 arms fresh
   });
 
@@ -58,12 +58,13 @@ describe("advancePanelTaskScope (task-scoped panel visibility)", () => {
     expect(advancePanelTaskScope(s, obs("A", 2))).toBeNull();
   });
 
-  it("a taskCount decrease re-baselines silently: no boundary, no surprise reopen; the next real boundary works", () => {
+  it("a taskCount decrease re-baselines silently: no surprise reopen, and the next real boundary still arms", () => {
     const s = createPanelTaskScope();
     advancePanelTaskScope(s, obs("A", 5));
-    // A resync swapped in a smaller model while a spawn runs: neither close nor auto-open —
-    // reopening a panel the user closed mid-task would be a surprise.
+    // A resync swapped in a smaller model while a spawn runs: no auto-open — reopening a panel
+    // the user closed mid-task would be a surprise.
     expect(advancePanelTaskScope(s, obs("A", 3, true))).toBeNull();
-    expect(advancePanelTaskScope(s, obs("A", 4))).toBe("close");
+    expect(advancePanelTaskScope(s, obs("A", 4))).toBeNull(); // boundary itself is silent
+    expect(advancePanelTaskScope(s, obs("A", 4, true))).toBe("autoOpen"); // but it re-armed
   });
 });