Show progress indicator in file finder (#54515)

When opening the file finder in a large project, it was impossible to
tell whether the scan was complete and if the results were final. Now we
show an animated arrow circle while the scan is active.

<img width="425" height="380" alt="Screenshot 2026-04-22 at 18 42 01"
src="https://github.com/user-attachments/assets/6d772483-a6c8-406b-bbf8-db810df7ab68"
/>


Closes #48009



Release Notes:

- N/A

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

Cargo.lock

@@ -6306,6 +6306,7 @@ dependencies = [
  "theme",
  "theme_settings",
  "ui",
+ "ui_input",
  "util",
  "workspace",
  "zed_actions",

crates/file_finder/Cargo.toml

@@ -31,6 +31,7 @@ settings.workspace = true
 serde.workspace = true
 theme.workspace = true
 ui.workspace = true
+ui_input.workspace = true
 util.workspace = true
 workspace.workspace = true
 zed_actions.workspace = true

crates/file_finder/src/file_finder.rs

@@ -13,8 +13,8 @@ use fuzzy::{StringMatch, StringMatchCandidate};
 use fuzzy_nucleo::{PathMatch, PathMatchCandidate};
 use gpui::{
     Action, AnyElement, App, Context, DismissEvent, Entity, EventEmitter, FocusHandle, Focusable,
-    KeyContext, Modifiers, ModifiersChangedEvent, ParentElement, Render, Styled, Task, WeakEntity,
-    Window, actions, rems,
+    KeyContext, Modifiers, ModifiersChangedEvent, ParentElement, Render,
+    StatefulInteractiveElement, Styled, Task, WeakEntity, Window, actions, rems,
 };
 use open_path_prompt::{
     OpenPathPrompt,
@@ -37,9 +37,10 @@ use std::{
     },
 };
 use ui::{
-    ButtonLike, ContextMenu, HighlightedLabel, Indicator, KeyBinding, ListItem, ListItemSpacing,
-    PopoverMenu, PopoverMenuHandle, TintColor, Tooltip, prelude::*,
+    ButtonLike, CommonAnimationExt, ContextMenu, HighlightedLabel, Indicator, KeyBinding, ListItem,
+    ListItemSpacing, PopoverMenu, PopoverMenuHandle, TintColor, Tooltip, prelude::*,
 };
+use ui_input::ErasedEditor;
 use util::{
     ResultExt, maybe,
     paths::{PathStyle, PathWithPosition},
@@ -1757,6 +1758,41 @@ impl PickerDelegate for FileFinderDelegate {
         )
     }
 
+    fn render_editor(
+        &self,
+        editor: &Arc<dyn ErasedEditor>,
+        window: &mut Window,
+        cx: &mut Context<Picker<Self>>,
+    ) -> Div {
+        let has_search_query = self.latest_search_query.is_some();
+        let is_project_scan_running = {
+            let worktree_store = self.project.read(cx).worktree_store();
+            !worktree_store.read(cx).initial_scan_completed()
+        };
+
+        h_flex()
+            .flex_none()
+            .h_9()
+            .px_2p5()
+            .justify_between()
+            .border_b_1()
+            .border_color(cx.theme().colors().border_variant)
+            .child(editor.render(window, cx))
+            .when(is_project_scan_running && has_search_query, |this| {
+                this.child(
+                    h_flex()
+                        .id("project-scan-indicator")
+                        .tooltip(Tooltip::text("Project Scan in Progress…"))
+                        .child(
+                            Icon::new(IconName::LoadCircle)
+                                .color(Color::Accent)
+                                .size(IconSize::Small)
+                                .with_rotate_animation(2),
+                        ),
+                )
+            })
+    }
+
     fn render_footer(&self, _: &mut Window, cx: &mut Context<Picker<Self>>) -> Option<AnyElement> {
         let focus_handle = self.focus_handle.clone();