fix: use share paths, drop additional from list_dir, remove debug logging

Root cause: DSM expects share paths (/dev) not volume paths (/volume1/dev).
The 408 errors were triggered by any additional field on the wrong path format.

- list_shares: use share["path"] directly (e.g. /dev), drop real_path from
  additional — only volume_status remains
- list_dir: remove additional parameter entirely; table now shows name + type
  (isdir is returned by default); update docstring to show share path examples
- client.py: remove diagnostic REQUEST and RAW ERROR stderr logging
- tests: update assertions to match share paths and two-column table output

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

src/mcp_synology_filestation/tools/filestation.py

@@ -69,7 +69,7 @@ def register_filestation(
             data = await client.request(
                 "SYNO.FileStation.List",
                 "list_share",
-                params={"additional": json.dumps(["real_path", "volume_status"])},
+                params={"additional": json.dumps(["volume_status"])},
             )
         except SynologyError as e:
             return f"Error: {e}"
@@ -82,7 +82,7 @@ def register_filestation(
         rows = []
         for share in shares:
             name = share.get("name", "")
-            path = share.get("additional", {}).get("real_path") or share.get("path", "")
+            path = share.get("path", f"/{name}")
             vol = share.get("additional", {}).get("volume_status", {})
             total = vol.get("totalspace")
             used = vol.get("usedspace")
@@ -119,8 +119,11 @@ def register_filestation(
     ) -> str:
         """List the contents of a directory on the NAS.
 
+        Use share paths as returned by list_shares (e.g. "/dev", "/data"),
+        not volume paths (e.g. "/volume1/dev" will not work).
+
         Args:
-            path: Absolute path on the NAS (e.g. "/volume1/data").
+            path: Share-relative path on the NAS (e.g. "/dev" or "/data/photos").
             offset: Number of items to skip (for pagination).
             limit: Maximum items to return (1-500, default 100).
             sort_by: Sort field — one of: name, size, user, group, mtime, atime,
@@ -128,8 +131,8 @@ def register_filestation(
             sort_direction: "asc" or "desc".
 
         Returns:
-            Formatted table with name, type, size, and modification time,
-            plus the total item count for pagination context.
+            Formatted table with name and type, plus the total item count
+            for pagination context.
         """
         from mcp_synology_filestation.client import SynologyError
 
@@ -151,7 +154,6 @@ def register_filestation(
                     "limit": limit,
                     "sort_by": sort_by,
                     "sort_direction": sort_direction,
-                    "additional": "size,time",  # DEBUG: comma-separated (no json.dumps)
                 },
             )
         except SynologyError as e:
@@ -163,45 +165,22 @@ def register_filestation(
         if not files:
             return f"Directory '{path}' is empty (or does not exist)."
 
-        # Build table
+        # Build table — name + type only (no additional fields requested)
         rows = []
         for f in files:
             name = f.get("name", "")
-            is_dir = f.get("isdir", False)
-            ftype = "dir" if is_dir else "file"
-            add = f.get("additional", {})
-            size_val = add.get("size")
-            size_str = "-" if is_dir else _fmt_size(size_val)
-            mtime = add.get("time", {}).get("mtime")
-            mtime_str = _fmt_time(mtime)
-            rows.append((name, ftype, size_str, mtime_str))
+            ftype = "dir" if f.get("isdir", False) else "file"
+            rows.append((name, ftype))
 
         w_name = max(len("Name"), *(len(r[0]) for r in rows))
         w_type = max(len("Type"), *(len(r[1]) for r in rows))
-        w_size = max(len("Size"), *(len(r[2]) for r in rows))
-        w_mtime = max(len("Modified"), *(len(r[3]) for r in rows))
 
-        sep = (
-            f"+{'-' * (w_name + 2)}"
-            f"+{'-' * (w_type + 2)}"
-            f"+{'-' * (w_size + 2)}"
-            f"+{'-' * (w_mtime + 2)}+"
-        )
-        header = (
-            f"| {'Name':<{w_name}} "
-            f"| {'Type':<{w_type}} "
-            f"| {'Size':<{w_size}} "
-            f"| {'Modified':<{w_mtime}} |"
-        )
+        sep = f"+{'-' * (w_name + 2)}+{'-' * (w_type + 2)}+"
+        header = f"| {'Name':<{w_name}} | {'Type':<{w_type}} |"
 
         lines = [f"Path: {path}", sep, header, sep]
-        for name, ftype, size_str, mtime_str in rows:
-            lines.append(
-                f"| {name:<{w_name}} "
-                f"| {ftype:<{w_type}} "
-                f"| {size_str:<{w_size}} "
-                f"| {mtime_str:<{w_mtime}} |"
-            )
+        for name, ftype in rows:
+            lines.append(f"| {name:<{w_name}} | {ftype:<{w_type}} |")
         lines.append(sep)
 
         end = offset + len(files)