Accept --control=PORT like --control PORT

Fixes #837

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

apps/figcraft/src/args.rs

@@ -7,7 +7,7 @@
 /// What the app was started with.
 #[derive(Debug, Default, PartialEq, Eq)]
 pub struct Args {
-    /// `--control <port>`: the JSON-lines control server.
+    /// `--control <port>` (or `--control=<port>`): the JSON-lines control server.
     pub control: Option<u16>,
     pub files: Vec<String>,
     /// The last invite link given.
@@ -63,8 +63,8 @@ pub fn parse(args: &[String]) -> Args {
         };
         if let Some(roots) = roots {
             roots.push(inline.or_else(|| it.next().cloned()).unwrap_or_default());
-        } else if a == "--control" {
-            out.control = it.next().and_then(|p| p.parse().ok());
+        } else if flag == "--control" {
+            out.control = inline.or_else(|| it.next().cloned()).and_then(|p| p.parse().ok());
         } else if is_invite(a) {
             out.join = Some(a.clone());
         } else if let Some(path) = file_url_path(a) {

apps/figcraft/src/args_tests.rs

@@ -16,6 +16,14 @@ fn files_and_the_control_port() {
     assert_eq!(parse(&args(&["--control", "nope"])).control, None);
 }
 
+#[test]
+fn the_control_port_accepts_the_equals_form() {
+    let a = parse(&args(&["--control=7980", "a.figcraft"]));
+    assert_eq!(a, Args { control: Some(7980), files: args(&["a.figcraft"]), ..Args::default() });
+    // A bad port is ignored, not taken as a file.
+    assert_eq!(parse(&args(&["--control=nope"])), Args::default());
+}
+
 #[test]
 fn automation_roots_repeat_and_are_never_files() {
     let a = parse(&args(&["--automation-read-root", "in", "--automation-write-root=out", "--automation-read-root=more", "a.figcraft"]));