Fix some tab/group renaming bugs (warpdotdev#13261)

## Description

Fixes inline rename behavior in the vertical tabs panel:
• Clicking the panel's empty background now cancels an in-progress
tab/pane/group rename (previously the editor stayed open).
• In Panes view, double-click now renames the pane under the cursor (the
active pane) instead of the tab (this caused all panes to show rename
editor). Tabs/Summary view still renames the tab.

## Linked Issue


https://linear.app/warpdotdev/issue/APP-4806/rename-canceled-for-click-on-tab-panel

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### Screenshots / Videos

https://www.loom.com/share/e3ea82c9d481498590b34f5e62914f3b

Author: johnturcoo

app/src/workspace/action.rs

@@ -186,6 +186,10 @@ pub enum WorkspaceAction {
     ToggleTabGroupCollapsed(TabGroupId),
     /// Opens an inline editor over the given group's header for renaming.
     RenameTabGroup(TabGroupId),
+    /// Cancels any active rename (tab, pane, or group) without committing the
+    /// new name. Dispatched when clicking on the vtab panel background while a
+    /// rename editor is open.
+    CancelActiveRename,
     /// Creates a new tab group containing the tab at the given index.
     NewTabGroupFromTab(usize),
     /// Moves the tab at `tab_index` into `group_id`, appending it to the
@@ -1136,6 +1140,7 @@ impl WorkspaceAction {
             | ShiftSelectTabRange { .. }
             | ToggleTabMultiSelection { .. }
             | ClearTabMultiSelection
+            | CancelActiveRename
             | StartNewConversation { .. }
             | UndoRevertInCodeReviewPane { .. }
             | JumpToLatestToast

app/src/workspace/view.rs

@@ -23634,6 +23634,11 @@ impl TypedActionView for Workspace {
             CloseTabGroup(group_id) => self.close_tab_group(*group_id, ctx),
             ToggleTabGroupCollapsed(group_id) => self.toggle_tab_group_collapsed(*group_id, ctx),
             RenameTabGroup(group_id) => self.rename_tab_group(*group_id, ctx),
+            CancelActiveRename => {
+                self.cancel_tab_rename(ctx);
+                self.cancel_pane_rename(ctx);
+                self.cancel_tab_group_rename(ctx);
+            }
             NewTabGroupFromTab(tab_index) => self.new_tab_group_from_tab(*tab_index, ctx),
             MoveTabToGroup {
                 tab_index,

app/src/workspace/view/vertical_tabs.rs

@@ -402,7 +402,7 @@ fn render_pane_row_element(
         pane_color,
         badge_mouse_states: _,
         detail_hover_state,
-        display_granularity: _,
+        display_granularity,
         renamable_tab_index,
         pane_context_menu_tab_index,
         is_tab_being_renamed,
@@ -541,18 +541,22 @@ fn render_pane_row_element(
     .with_skip_synthetic_hover_out()
     .with_cursor(Cursor::PointingHand);
 
-    if let Some(tab_index) = renamable_tab_index.filter(|_| !is_tab_being_renamed) {
-        row = row.on_double_click(move |ctx, _, _| {
-            ctx.dispatch_typed_action(WorkspaceAction::RenameTab(tab_index));
-        });
-    }
     let pane_locator = PaneViewLocator {
         pane_group_id,
         pane_id,
     };
-    if pane_context_menu_tab_index.is_some() && !is_pane_being_renamed {
+    let row_supports_rename =
+        renamable_tab_index.is_some() || pane_context_menu_tab_index.is_some();
+    // Panes view: row == a pane, rename the pane. Tabs/Summary: row == the tab, rename the tab.
+    if matches!(display_granularity, VerticalTabsDisplayGranularity::Panes) {
+        if row_supports_rename && !is_pane_being_renamed && !is_tab_being_renamed {
+            row = row.on_double_click(move |ctx, _, _| {
+                ctx.dispatch_typed_action(WorkspaceAction::RenamePane(pane_locator));
+            });
+        }
+    } else if let Some(tab_index) = renamable_tab_index.filter(|_| !is_tab_being_renamed) {
         row = row.on_double_click(move |ctx, _, _| {
-            ctx.dispatch_typed_action(WorkspaceAction::RenamePane(pane_locator));
+            ctx.dispatch_typed_action(WorkspaceAction::RenameTab(tab_index));
         });
     }
     if let Some(tab_index) = pane_context_menu_tab_index {
@@ -1711,6 +1715,9 @@ fn render_vertical_tabs_panel(
             .with_background(internal_colors::fg_overlay_1(theme))
             .finish()
     })
+    .on_click(|ctx, _, _| {
+        ctx.dispatch_typed_action(WorkspaceAction::CancelActiveRename);
+    })
     .on_right_click(|ctx, _, position| {
         if FeatureFlag::GroupedTabs.is_enabled() {
             ctx.dispatch_typed_action(WorkspaceAction::OpenNewSessionMenu {