feat(hub): right-click menu in the Files tab

The toolbar's actions on the row under the pointer, sharing one action list
with the toolbar — which keeps showing what does not apply, disabled, while
the menu leaves it out. A count only where more than one item is concerned.

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

1 files changed, 60 insertions, 0 deletions

diff --git a/packages/meshbay-hub/tests/test_files_context_menu.py b/packages/meshbay-hub/tests/test_files_context_menu.py
new file mode 100644
index 0000000..cfcbd90
--- /dev/null
+++ b/packages/meshbay-hub/tests/test_files_context_menu.py
@@ -0,0 +1,60 @@
+"""
+Right-click in the Files tab opens the shared `Menu` (`menu.js`) with what can
+be done to that row — the toolbar's actions, from the same list.
+
+The one difference from the toolbar is deliberate: the toolbar keeps an action
+that does not apply, disabled, so it does not jump about as the selection
+changes; a menu has no layout to keep still, so it leaves the action out.
+
+Measured in a browser by `harness/files_menu_probe.py`.
+"""
+
+import json
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+
+HARNESS = Path(__file__).parent / "harness" / "files_menu_probe.py"
+
+
+@pytest.fixture(scope="module")
+def cases():
+    if shutil.which("google-chrome") is None:
+        pytest.skip("Chrome is not available")
+    proc = subprocess.run([sys.executable, str(HARNESS)],
+                          capture_output=True, text=True, timeout=90)
+    data = json.loads(proc.stdout)
+    assert "error" not in data, f"probe failed: {proc.stdout}{proc.stderr}"
+    assert not data["logs"], data["logs"]
+    return {c["case"]: c for c in data["cases"]}
+
+
+def test_a_folder_offers_the_zip_only(cases):
+    c = cases["folder"]
+    assert c["prevented"]
+    assert c["labels"] == ["Download folder as zip"]
+
+
+def test_a_video_of_ones_own_can_be_played_downloaded_and_deleted(cases):
+    assert cases["own video"]["labels"] == ["Play", "Download", "Delete"]
+
+
+def test_what_does_not_apply_is_left_out_not_greyed(cases):
+    # Someone else's text file: no Play, no zip, and no Delete — the reader
+    # has no right to it, so the entry is absent rather than disabled.
+    assert cases["someone else's text"]["labels"] == ["View", "Download"]
+
+
+def test_a_ticked_row_stands_for_the_whole_selection(cases):
+    c = cases["ticked row stands for the selection"]
+    assert c["ticked"] == 2
+    assert c["labels"] == ["Download (2)", "Delete"]
+
+
+def test_the_toolbar_still_greys_what_does_not_apply(cases):
+    c = cases["toolbar keeps disabled buttons"]
+    assert c["buttons"] == 5
+    assert c["disabled"] == 3