Merge branch 'refactor/groups-phase1'

Groups refactor, phases 1-3.

The root model replaces the old `upload` flag and group-wide `member_upload`
with per-root `writable`/`removable`/`ejected`, carried by a `RootSet` that
both front doors — the loopback API and signed MNP — reach through the same
`ops` functions. MNP goes to 1.1, additively: the roots table now rides on
`index_delta`, so a root added, removed, ejected or plugged reaches every
connected client instead of only whoever reloaded.

The group UI becomes a plugin architecture: an application is a registry
entry in `apps.js` plus its own files, with directories stored generically
by `ops.set_app_directories` under whatever the app is called. A reference
application, hidden behind `?dev=1`, is what makes that claim testable —
adding it is what found the two places still naming apps by hand.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011pvMdvLBG92jyhvD5pD6us

1 files changed, 8 insertions, 3 deletions

diff --git a/packages/meshbay-node/tests/test_root_availability.py b/packages/meshbay-node/tests/test_root_availability.py
index 0201c1f..d514dee 100644
--- a/packages/meshbay-node/tests/test_root_availability.py
+++ b/packages/meshbay-node/tests/test_root_availability.py
@@ -26,9 +26,12 @@ from meshbay_node.roots import RootSet
 pytestmark = pytest.mark.asyncio
 
 
-def _roots(*paths: Path) -> RootSet:
+def _roots(*paths: Path, removable: bool = False) -> RootSet:
     specs = [{"path": str(p)} for p in paths]
-    specs[0]["upload"] = True
+    specs[0]["writable"] = True
+    if removable:
+        for spec in specs:
+            spec["removable"] = True
     return RootSet.build(specs)
 
 
@@ -117,7 +120,9 @@ async def test_members_are_told_which_roots_are_unavailable(tmp_path):
 
     idx = await _indexer(_roots(films))
     assert idx.index.roots == [
-        {"name": "Films", "kind": "generic", "available": True, "upload": True}]
+        {"name": "Films", "kind": "generic", "available": True,
+         "writable": True, "removable": False, "ejected": False,
+         "upload": True}]
 
     (films / "a.mkv").unlink()
     films.rmdir()