feat(input): lock the next point to a typed <angle

Typing <angle at a point prompt (e.g. <30) now fixes the direction of
the next point from the last one until a point is placed: the cursor
moves along that direction, and a bare number entered next is the
distance along it. The angle is read in the drawing's angle base and
direction and turned into the current UCS. Works from the command line
and from scripts or the automation token input alike.

Fixes #1464

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

src/app/command_driver/utilities.rs

@@ -98,6 +98,7 @@ impl OpenCADStudio {
         self.otrack_cross = None;
         self.otrack_kind = None;
         self.axis_lock_dir = None;
+        self.angle_override = None;
         self.dyn_user_reshaped = false;
         self.dyn_coord_absolute = false;
         self.grip_hover = None;
@@ -595,6 +596,7 @@ impl OpenCADStudio {
             if !self.command_point_allowed(i, *point) {
                 return (Task::none(), true);
             }
+            self.angle_override = None;
             // Typed / dynamic-input / headless points carry no snap, but the
             // accepted-snap list must stay index-parallel with the points the
             // command collects. Interactive picks record themselves in
@@ -1130,6 +1132,9 @@ impl OpenCADStudio {
             self.apply_snap_override(kind);
             return Task::none();
         }
+        if self.try_angle_override(token) {
+            return Task::none();
+        }
         if let Some((coord, kind)) = crate::app::helpers::parse_coord(token) {
             // Match the GUI command line: typed coordinates are in the active
             // UCS (relative offsets are rotated by the UCS axes), so a multi-
@@ -1161,7 +1166,13 @@ impl OpenCADStudio {
             // bare number is the step's own value, not a distance — ROTATE's
             // angle, SCALE's factor, CIRCLE's radius. Only a token no step
             // claims becomes direct distance entry, measured along the cursor
-            // direction from the command's anchor.
+            // direction from the command's anchor. Under a typed `<angle`
+            // the number is the distance along it first.
+            if self.angle_override.is_some() {
+                if let Some(distance) = self.try_direct_distance_entry(token) {
+                    return distance;
+                }
+            }
             let (task, consumed) = self.feed_command_consumed(StepInput::Text(token.to_string()));
             if consumed {
                 return task;