fix: avoid rendering share modal without a session

app/src/pane_group/pane/terminal_pane.rs

@@ -971,13 +971,15 @@ fn handle_terminal_view_event(
                 }
             }
             Event::ShareModalOpened(block_id) => {
+                let Some(session) = group.terminal_view_from_pane_id(pane_id, ctx) else {
+                    return;
+                };
+                let model = session.read(ctx, |view, _| view.model.clone());
+
                 group.terminal_with_open_share_block_modal = Some(terminal_pane_id);
                 group.share_block_modal.update(ctx, |share_modal, ctx| {
-                    if let Some(session) = group.terminal_view_from_pane_id(pane_id, ctx) {
-                        let model = session.read(ctx, |view, _| view.model.clone());
-                        share_modal.open_with_model_update(model, *block_id, ctx);
-                        ctx.notify();
-                    }
+                    share_modal.open_with_model_update(model, *block_id, ctx);
+                    ctx.notify();
                 });
                 ctx.notify();
             }

app/src/terminal/share_block_modal.rs

@@ -1023,7 +1023,9 @@ impl ShareBlockModal {
                 .finish()
             }
             None => {
-                log::warn!("Tried to render share modal without a model");
+                // The pane group normally prevents this state, but keep the
+                // fallback quiet if a stale close/open event races a render.
+                log::debug!("Tried to render share modal without a model");
                 Empty::new().finish()
             }
         };