fix(commands): deny list during BEDIT

Refuse LAYOUT, VPORTS, MVIEW, WBLOCK, PURGE, RENAME, REFEDIT,
REFEDIT_BEGIN and PLOT from the command line while a block editor
session is open, matching the reference product's
"<CMD> command not allowed in block editor" behaviour (spec section 8,
based on the V7 hands-on check). XREF, NEW, OPEN and SAVEAS stay
allowed. The service-level RENAME guard stays as defense in depth.

src/app/command_driver/tests.rs

@@ -1318,6 +1318,115 @@ mod bedit_characterization_tests {
         assert!(app.tabs[tab].block_edits.is_empty());
     }
 
+    /// V7 (reference check): while a block editor session is open this
+    /// command set is refused outright with "not allowed in block editor";
+    /// the refusal pushes no undo entry and starts no command.
+    #[test]
+    fn locked_deny_list_refuses_while_session_open() {
+        let mut app = OpenCADStudio::new_for_test();
+        let (insert, _) = setup_block_and_insert(&mut app);
+        let tab = app.active_tab;
+        let _ = app.dispatch_command(&format!("BEDIT_BEGIN:{}", insert.value()));
+        assert!(
+            app.tabs[tab].active_block_edit.is_some(),
+            "setup: BEDIT_BEGIN should open a session"
+        );
+        let undo_depth = app.tabs[tab].history.undo_stack.len();
+        for verb in [
+            "LAYOUT",
+            "VPORTS",
+            "MVIEW",
+            "WBLOCK",
+            "PURGE",
+            "RENAME",
+            "REFEDIT",
+            "REFEDIT_BEGIN",
+            "PLOT",
+        ] {
+            let revision = app.command_line.error_revision;
+            let _ = app.dispatch_command(verb);
+            assert_eq!(
+                app.command_line.error_revision,
+                revision.wrapping_add(1),
+                "{verb} must refuse with a command-line error"
+            );
+            assert!(
+                app.command_line
+                    .last_error
+                    .as_deref()
+                    .unwrap_or_default()
+                    .contains("command not allowed in block editor"),
+                "{verb}: got {:?}",
+                app.command_line.last_error
+            );
+            assert!(
+                app.tabs[tab].active_block_edit.is_some(),
+                "{verb} must keep the session open"
+            );
+            assert!(
+                app.tabs[tab].active_cmd.is_none(),
+                "{verb} must not install a command"
+            );
+            assert_eq!(
+                app.tabs[tab].history.undo_stack.len(),
+                undo_depth,
+                "{verb} must push no undo entry"
+            );
+        }
+    }
+
+    /// Spec 8: a rejected command must not cancel a running command — the
+    /// deny hook sits before the running-command teardown.
+    #[test]
+    fn locked_deny_list_does_not_cancel_a_running_command() {
+        let mut app = OpenCADStudio::new_for_test();
+        let (insert, _) = setup_block_and_insert(&mut app);
+        let tab = app.active_tab;
+        let _ = app.dispatch_command(&format!("BEDIT_BEGIN:{}", insert.value()));
+        assert!(app.tabs[tab].active_block_edit.is_some());
+        let _ = app.dispatch_command("LINE");
+        assert_eq!(
+            app.tabs[tab].active_cmd.as_deref().map(|cmd| cmd.name()),
+            Some("LINE"),
+            "setup: LINE should be running inside the session"
+        );
+        let _ = app.dispatch_command("LAYOUT");
+        assert!(app
+            .command_line
+            .last_error
+            .as_deref()
+            .unwrap_or_default()
+            .contains("command not allowed in block editor"));
+        assert_eq!(
+            app.tabs[tab].active_cmd.as_deref().map(|cmd| cmd.name()),
+            Some("LINE"),
+            "the refused command must leave the running LINE untouched"
+        );
+    }
+
+    /// V7: the reference keeps XREF, NEW, OPEN, SAVEAS and BEDIT available
+    /// inside the editor — the deny list must not touch them.
+    #[test]
+    fn locked_deny_list_leaves_v7_allowed_commands_alone() {
+        for verb in ["XREF", "NEW", "OPEN", "SAVEAS", "BEDIT"] {
+            let mut app = OpenCADStudio::new_for_test();
+            let (insert, _) = setup_block_and_insert(&mut app);
+            let tab = app.active_tab;
+            let _ = app.dispatch_command(&format!("BEDIT_BEGIN:{}", insert.value()));
+            assert!(app.tabs[tab].active_block_edit.is_some());
+            let _ = app.dispatch_command(verb);
+            assert!(
+                !app.command_line
+                    .last_error
+                    .as_deref()
+                    .unwrap_or_default()
+                    .contains("not allowed in block editor"),
+                "{verb} is available in the reference session and must not be denied: {:?}",
+                app.command_line.last_error
+            );
+        }
+    }
+
     // ---- documenting: today's behavior, expected to flip in Phase 1 ----
 
     /// Discard removes local before-images before drawing undo resumes.

src/app/commands/mod.rs

@@ -209,6 +209,30 @@ impl OpenCADStudio {
                 return Task::none();
             }
         }
+        // V7 (reference check): inside a block editor session a set of
+        // commands is refused outright. The hook sits after alias resolution
+        // and before the transparent split and the running-command teardown,
+        // so a rejected command leaves whatever is running untouched.
+        if self.tabs[i].active_block_edit.is_some() {
+            let name = cmd.split([' ', ':']).next().unwrap_or(cmd);
+            if matches!(
+                name,
+                "LAYOUT"
+                    | "VPORTS"
+                    | "MVIEW"
+                    | "WBLOCK"
+                    | "PURGE"
+                    | "RENAME"
+                    | "REFEDIT"
+                    | "REFEDIT_BEGIN"
+                    | "PLOT"
+            ) {
+                self.command_line.push_error(
+                    crate::tf!("{} command not allowed in block editor", name).as_ref(),
+                );
+                return Task::none();
+            }
+        }
         if is_spacemouse_command(cmd) {
             return self.run_action(cmd);
         }

src/app/update/block_ops_tests.rs

@@ -626,6 +626,9 @@ fn locked_rename_refuses_anonymous_and_layout_records_with_the_shared_text() {
 }
 
 /// A rename refuses a block with an open BEDIT session, whatever the new name.
+/// V7: the RENAME verb itself is refused at the command choke point while a
+/// session is open; the block service keeps its own refusal as defense in
+/// depth for the non-command paths (control op, palette).
 #[test]
 fn locked_rename_refuses_a_block_with_an_open_bedit_session() {
     let mut app = app();
@@ -639,9 +642,9 @@ fn locked_rename_refuses_a_block_with_an_open_bedit_session() {
     assert_eq!(undo_entry_count(&app), before);
     assert_eq!(
         errors(&app),
-        vec![command_line_error(&format!(
+        vec![command_line_error(
-            "block \"{name}\" is open in the block editor; close the editor first"
+            "RENAME command not allowed in block editor"
-        ))]
+        )]
     );
     let _ = app.dispatch_command("BEDIT_DISCARD");
 }