fix: review fixes for the merged command-line, plugin and font changes

Direct distance entry (#1429) turned every bare number at a point prompt
into a distance, so ROTATE's angle and the values automation types were
read as coordinates. The step reads the token first now — `feed_command`
reports whether it claimed it — and only an unclaimed one becomes a
distance. That also puts the token back on the unified step driver, which
owns the P / L selection keywords and the dimension-snap bookkeeping, and
stops `on_text_input` running twice for the same token. A tracking ray
carries its own base, so it no longer demands an anchor that the first
point of a command does not have yet.

Plugin command execution (#1425) re-implemented the command line inside
the plugin host: it dispatched families directly, skipping the teardown
that starts a command (grip edits, selection gestures, `last_point`, the
accepted snaps), and made every `CmdResult::Dispatch` in the application
skip plugin dispatch to avoid its own re-entrancy. A scripted line now
runs through `run_command_line`, with the trailing Enter left off while
the plugin streams the command, and the re-entrancy is handled by a flag
set for the length of the plugin's call. A pause parks the line's Enter
with the rest of its tokens instead of dropping it.

A font reference (#1432) tried the family lookup before the face-file
index, and that lookup ends in a prefix match a longer file name loses to
(`ISOCPEUI.TTF` would take `ISOCP`). The exact file answers first.

Co-Authored-By: Claude Opus 5 <[email protected]>

src/app/mod.rs

@@ -623,6 +623,11 @@ pub(super) struct OpenCADStudio {
     pub constraint_form_annotational: bool,
     /// The dimensional constraint DIMCONSTRAINT offers by default: the last one used.
     pub dim_constraint_last: &'static str,
+    /// Set while a plugin drives the command line (`HostApi::execute_command`).
+    /// Dispatching a plugin command from there would call back into the plugin
+    /// that is still blocked waiting for this request, so plugin dispatch is
+    /// skipped for the length of the call.
+    pub(crate) suppress_plugin_dispatch: bool,
     pub constraint_bar_mode: i16,
     /// Minutes between autosaves to a `.sv$` recovery file (SAVETIME command);
     /// 0 disables autosave.
@@ -3964,6 +3969,7 @@ impl OpenCADStudio {
             constraint_bar_display: 3,
             constraint_form_annotational: false,
             dim_constraint_last: "Aligned",
+            suppress_plugin_dispatch: false,
             constraint_bar_mode: 4095,
             savetime_min: 10,
             default_bg_color: None,