fix(node): name a root after its drive when its basename is taken

Two drives with a folder of the same name made the second add fail,
and no screen could supply another name. add_root now names it
"Name (H)" or "Name (parent)"; a name the operator typed is still
refused on a clash.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/packages/meshbay-node/src/meshbay_node/roots.py b/packages/meshbay-node/src/meshbay_node/roots.py
index 2b48292..7dded1f 100644
--- a/packages/meshbay-node/src/meshbay_node/roots.py
+++ b/packages/meshbay-node/src/meshbay_node/roots.py
@@ -211,6 +211,27 @@ def derive_name(path: Path) -> str:
     return name
 
 
+def distinct_name(path: Path, taken: set[str]) -> str:
+    """
+    `derive_name(path)`, or, when a root in `taken` (folded names) already has
+    it, that name followed by where the directory is: `Archives (H)` for
+    `H:\\Archives` beside `G:\\Archives`, `Films (b)` for `/mnt/b/Films`.
+
+    The same folder name on two drives is the ordinary case, and the interface
+    has no field to type a name into, so refusing it left no way forward.
+    """
+    base = derive_name(path)
+    candidates = [base]
+    where = path.parent.name or path.drive.rstrip(":")
+    if where:
+        candidates.append(f"{base} ({where})")
+    candidates += [f"{base} ({n})" for n in range(2, 100)]
+    for name in candidates:
+        if fold(name) not in taken and not portable_name_problem(name):
+            return name
+    return base
+
+
 @dataclass
 class RootSet:
     """