feat(hub): show the node's public key in Node → Overview

It was only the Node ID row's fallback, so it vanished the moment the node
announced itself — and was labelled Node ID when it did show. Own row, copy
button, and the profile's instructions no longer name the node dashboard
removed on 2026-09-01.

`.node-key` wraps: 44 base64 characters with no break opportunity pushed a
412px document to 417px, which unpins every sticky element on the page. The
width probe now measures the Overview table with a real key in it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/packages/meshbay-hub/tests/test_node_page_width_measured.py b/packages/meshbay-hub/tests/test_node_page_width_measured.py
index ebf07ab..bd6a231 100644
--- a/packages/meshbay-hub/tests/test_node_page_width_measured.py
+++ b/packages/meshbay-hub/tests/test_node_page_width_measured.py
@@ -41,6 +41,29 @@ AUDIT_ROWS = [
 ]
 
 
+# A real Ed25519 public key as the node reports it: 32 bytes of base64, 44
+# characters with not one break opportunity among them. Shortening it here
+# would measure the fixture instead of the page -- the exact mistake that let
+# a folder name and then a translated column head push this page sideways.
+NODE_KEY = "kP3vQ8mZ2rT7xN1bY6wL4hJ9cF5dS0aG8eR2uI7oK4M="
+
+
+def _overview_table():
+    rows = [
+        ("Version", "0.14.0"),
+        ("Node ID", "203.0.113.7:0"),
+        ("Node key", f'<code class="node-key">{NODE_KEY}</code>'
+                     '<button class="btn btn-small btn-secondary">Copy</button>'),
+        ("QUIC port", "0"),
+        ("Hub", "https://example.invalid"),
+    ]
+    body = "".join(f"<tr><td>{k}</td><td>{v}</td></tr>" for k, v in rows)
+    return f"""
+      <table class="node-table node-table-overview">
+        <tbody>{body}</tbody>
+      </table>"""
+
+
 def _audit_table():
     head = "".join(f"<th>{c}</th>" for c in
                    ("Time", "Event", "User", "IP", "Group", "Detail"))
@@ -65,6 +88,10 @@ FRAGMENT = textwrap.dedent(f"""
         <div id="node" class="page-content node-page">
           <h2>Node</h2>
           <div class="node-group">
+            <h3 class="settings-heading">Overview</h3>
+            {_overview_table()}
+          </div>
+          <div class="node-group">
             <h3 class="settings-heading">Audit</h3>
             {_audit_table()}
           </div>
@@ -87,6 +114,7 @@ FRAGMENT = textwrap.dedent(f"""
 WIDTHS = [320, 360, 412, 768, 1024]
 SELECTORS = ["#node.node-page", "#settings", "#node .node-table-scroll",
              "#node .node-table-audit", "#node .node-group",
+             "#node .node-table-overview", "#node .node-key",
              "#settings .settings-section"]
 
 
@@ -172,3 +200,29 @@ def test_the_audit_table_still_scrolls_itself_on_a_phone(measured, width):
     page = _box(measured, width, "#node.node-page")
     assert page["offRight"] == 0, (
         f"{page['offRight']} px of the Node page is off a {width} px screen")
+
+
+@pytest.mark.parametrize("width", [320, 360, 412])
+def test_the_node_key_does_not_widen_the_page_on_a_phone(measured, width):
+    """The Overview table has no scroller of its own.
+
+    `.node-table-audit` may overflow because `.node-table-scroll` contains it.
+    Overview is a bare `.node-table` in a `.node-group`, so a cell that refuses
+    to wrap sets the column's minimum width and pushes the document itself
+    wider than the screen -- which detaches every `position: sticky` element on
+    the page from a viewport the reader can no longer see, the navigation bar
+    included. `.node-key` carries `word-break: break-all` for that reason;
+    remove it and this fails.
+    """
+    r = measured[str(width)]
+    assert r["docScrollW"] <= r["viewport"]["w"], (
+        f"the document scrolls to {r['docScrollW']} px on a {width} px screen "
+        "— the node key is pushing the page wider instead of wrapping")
+    table = _box(measured, width, "#node .node-table-overview")
+    card = _box(measured, width, "#node .node-group")
+    assert table["width"] <= card["width"], (
+        f"at {width} px the Overview table is {table['width']} px inside a "
+        f"{card['width']} px card — the key is driving the column")
+    key = _box(measured, width, "#node .node-key")
+    assert key["offRight"] == 0, (
+        f"{key['offRight']} px of the node key is off a {width} px screen")