feat(ui): 11-point UI overhaul — tabs, transfers, settings, uploads

Hub/UI:
- Icon-only group tabs (chat, files, settings) with per-group default tab
- Transfer widget: filename becomes a clickable link to open completed downloads
- Pulse animation on transfer icon (pale→dark green) while active
- Download button feedback in FilePreview (spinner, auto-reset)
- Group mute toggle persists across navigation
- Login page autofocus, chat refocus after send
- Theme toggle closes menu, status badge and duplicate connecting removed
- Create-folder restricted to operators, download-path note removed
- User preferences API (CRUD) with Alembic migration
- Profile: email display/edit via PATCH /v1/users/me
- Settings: "Defaults" section for default tab selector
- All 10 locale files updated

Node:
- upload_dir in node.toml: separate filesystem path for uploads
- Root.direct flag: uploads land at root path, no subdirectory
- CLI --upload-dir flag on `group add`
- Admin UI accepts upload_dir

Client (Electron):
- shell.openPath bridge for opening completed downloads
- platform.js passes open callback from native save

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 11 insertions, 6 deletions

diff --git a/packages/meshbay-node/src/meshbay_node/roots.py b/packages/meshbay-node/src/meshbay_node/roots.py
index 8f999d7..bc27bf7 100644
--- a/packages/meshbay-node/src/meshbay_node/roots.py
+++ b/packages/meshbay-node/src/meshbay_node/roots.py
@@ -51,6 +51,7 @@ class Root:
     path: Path
     kind: str = "generic"
     upload: bool = False
+    direct: bool = False
     # Runtime, not configuration: set by the indexer when the directory can no
     # longer be read, and cleared when it comes back.
     available: bool = True
@@ -139,7 +140,8 @@ class RootSet:
                 kind = "generic"
 
             root = Root(name=name, path=path, kind=kind,
-                        upload=bool(spec.get("upload", False)))
+                        upload=bool(spec.get("upload", False)),
+                        direct=bool(spec.get("direct", False)))
             _refuse_nesting(root, roots)
             roots.append(root)
             by_folded[root.folded] = root
@@ -277,11 +279,14 @@ class RootSet:
 
     def describe(self) -> list[dict]:
         """Per-root state for the index payload and the admin UI."""
-        return [
-            {"name": r.name, "kind": r.kind, "available": r.available,
-             "upload": r.upload}
-            for r in self.roots
-        ]
+        out = []
+        for r in self.roots:
+            d: dict = {"name": r.name, "kind": r.kind,
+                        "available": r.available, "upload": r.upload}
+            if r.direct:
+                d["direct"] = True
+            out.append(d)
+        return out
 
 
 def entry_abs_path(roots: RootSet, entry) -> Path | None: