Fix Mail Maildir paths and oCIS auth

Mail: INBOX is a subfolder (INBOX/cur), not the account root.
Removed special-case mapping that pointed INBOX to root dir.

Files: oCIS user may differ from MCP user (e.g. stefan -> admin).
Added _ocis_user() mapping for WebDAV paths and auth.

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

files/server.py

@@ -22,8 +22,12 @@ OCIS_CREDS = {u: (d['username'], d['password']) for u, d in _cfg['ocis_users'].i
 mcp = FastMCP("Files", stateless_http=True,
               transport_security={"enable_dns_rebinding_protection": False})
 
+def _ocis_user(u):
+    c = OCIS_CREDS.get(u)
+    return c[0] if c else u
+
 def _auth(u): c = OCIS_CREDS.get(u); return httpx.BasicAuth(c[0], c[1]) if c else None
-def _dav(u, p=""): return f"{OCIS}/remote.php/dav/files/{u}/{p.lstrip('/')}"
+def _dav(u, p=""): return f"{OCIS}/remote.php/dav/files/{_ocis_user(u)}/{p.lstrip('/')}"
 
 def _propfind(user, path="", depth=1):
     body = '<?xml version="1.0"?><d:propfind xmlns:d="DAV:"><d:prop><d:resourcetype/><d:displayname/><d:getcontentlength/><d:getlastmodified/><d:getcontenttype/></d:prop></d:propfind>'
@@ -35,7 +39,7 @@ def _parse_pf(xml, user):
     entries = []
     try: root = ET.fromstring(xml)
     except: return entries
-    bp = f"/remote.php/dav/files/{user}/"
+    bp = f"/remote.php/dav/files/{_ocis_user(user)}/"
     for resp in root.findall("d:response", ns):
         href = resp.findtext("d:href", "", ns) or ""
         rel = href.split(bp, 1)[-1].rstrip("/") if bp in href else href.rstrip("/")

mail/server.py

@@ -87,15 +87,16 @@ def _discover_folders(acct_path):
     folders = []
     for entry in sorted(Path(acct_path).rglob("cur")):
         rel = str(entry.parent.relative_to(acct_path))
-        if rel == ".":
-            folders.insert(0, "INBOX")
-        elif rel not in folders:
+        if rel != "." and rel not in folders:
             folders.append(rel)
+    if "INBOX" in folders:
+        folders.remove("INBOX")
+        folders.insert(0, "INBOX")
     return folders
 
 
 def _open_folder(acct_path, folder_name):
-    path = acct_path if folder_name == "INBOX" else os.path.join(acct_path, folder_name)
+    path = os.path.join(acct_path, folder_name)
     return mailbox.Maildir(path, create=False) if os.path.isdir(path) else None