fix(cli): parse --data-dir flag after command name

capsule-core/src/main.zig

@@ -30,9 +30,9 @@ pub fn main() !void {
         } else if (std.mem.eql(u8, args[i], "--port") and i + 1 < args.len) {
             port_override = std.fmt.parseInt(u16, args[i + 1], 10) catch null;
             i += 1;
-        } else {
+        } else if (cmd_idx == 1 and !std.mem.startsWith(u8, args[i], "--")) {
+            // First non-flag argument is the command
             cmd_idx = i;
-            break;
         }
     }