fix(chat): remove --cwd from Click options to allow optional value parsing

--cwd was defined as a Click option but also parsed manually from ctx.args,
which caused conflicts when --cwd was followed by another flag (like
--dangerously-skip-permissions). Now --cwd is parsed entirely manually,
allowing:
  --cwd alone -> use current directory
  --cwd /path -> use specified path
  (none)      -> use myclaude project root (default)

myclaude/commands/chat.py

@@ -79,15 +79,8 @@ def _parse_cwd_from_args(args: list[str]) -> tuple[str | None, list[str]]:
     default=False,
     help="Forward to claude: bypass permission checks (sandbox / isolated use only).",
 )
-@click.option(
-    "--cwd",
-    "-C",
-    multiple=True,
-    metavar="PATH",
-    help="Working directory for claude (default: myclaude project root; '--cwd' uses current dir; '--cwd /path' uses specific path).",
-)
 @click.pass_context
-def chat_cmd(ctx: click.Context, dangerously_skip_permissions: bool, cwd: tuple[str, ...]) -> None:
+def chat_cmd(ctx: click.Context, dangerously_skip_permissions: bool) -> None:
     """Run `claude` in the myclaude repo so CLAUDE.md and .claude/ apply; extra args pass through.
 
     \b
@@ -104,8 +97,7 @@ def chat_cmd(ctx: click.Context, dangerously_skip_permissions: bool, cwd: tuple[
         )
         raise SystemExit(127)
 
-    # Parse --cwd from raw args since Click doesn't support optional values natively
-    # (We ignore the 'cwd' parameter from Click and parse manually from ctx.args)
+    # Parse --cwd from raw args (Click doesn't support optional values natively)
     cwd_value, remaining_args = _parse_cwd_from_args(ctx.args)
 
     if cwd_value is None: