fix: improve sidebar worktree hierarchy and reordering (#1873)

* fix: clarify sidebar worktree hierarchy

refs #1694

* feat: reorder worktree groups as a unit

refs #1694

1 files changed, 10 insertions, 9 deletions

diff --git a/src/app/state.rs b/src/app/state.rs
index 6069b8a6..17b3ae4c 100644
--- a/src/app/state.rs
+++ b/src/app/state.rs
@@ -1141,10 +1141,16 @@ pub struct SettingsState {
     pub original_theme: Option<String>,
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub(crate) enum WorkspaceDropTarget {
+    Before(usize),
+    End,
+}
+
 pub(crate) enum DragTarget {
     WorkspaceReorder {
         source_ws_idx: usize,
-        insert_idx: Option<usize>,
+        drop_target: Option<WorkspaceDropTarget>,
     },
     TabReorder {
         ws_idx: usize,
@@ -2211,16 +2217,11 @@ impl AppState {
             match &drag.target {
                 DragTarget::WorkspaceReorder {
                     source_ws_idx,
-                    insert_idx,
+                    drop_target,
                 } => {
                     assert_workspace_index(*source_ws_idx, "workspace drag source");
-                    if let Some(insert_idx) = insert_idx {
-                        assert!(
-                            *insert_idx <= self.workspaces.len(),
-                            "workspace drag insert index {} out of bounds for {} workspaces",
-                            insert_idx,
-                            self.workspaces.len()
-                        );
+                    if let Some(WorkspaceDropTarget::Before(ws_idx)) = drop_target {
+                        assert_workspace_index(*ws_idx, "workspace drag target");
                     }
                 }
                 DragTarget::TabReorder {