yoda: cosmic-files customizations (squashed 21 commits)

This commit squashes the 21 local commits that customize cosmic-files for
the yoda stack, to allow a clean rebase on upstream/master.

Original commits (chronological):

- 9bcfe7a Cargo.toml: patch libcosmic via local path for dev builds
- 04abd13 yoda: depend on libcosmic-yoda (path) instead of upstream libcosmic
- 02adcc3 lockfile: libcosmic-yoda 0.1.0-yoda -> 0.1.0-yoda.2
- a025fd6 yoda: prefer cosmic-yoterm over upstream cosmic-term in terminal fallback
- e8d62ae yoda: add "Always use this app" toggle to OpenWith dialog
- 8fb2b15 yoda wayland-v5: redirect window_clipboard + cosmic-text to local forks
- 0595296 yoda: Dolphin-style quick actions toolbar under the headerbar
- 4b6d345 yoda: fix missing rename icon in toolbar
- 8b51af1 yoda: use pencil-symbolic for the Rename toolbar button
- 33a5c8f yoda: phase 2 - customizable toolbar (settings toggles per button)
- 1cf17dc yoda: phase 3 - drag-drop toolbar editor in Settings
- 11d4357 yoda: add up/down buttons next to drag handle in toolbar editor
- af843d2 yoda: direct drag-drop reorder on the toolbar itself
- 94c3e6c yoda: toolbar as segmented_button for working drag reorder
- f053819 yoda: toolbar icon-only + clean visual (Control style, 32px squares)
- 338354c Improve initial directory listing latency
- d080bc8 Resolve cosmic-files warnings without masking
- 69c35ab yoda: switch window_clipboard patch to public Forgejo fork
- 35e115f yoda: switch cosmic-text patch to public Forgejo fork
- 6f3adcd chore: clean feature-gated warnings
- 57ab1ec fix: clean files warnings for terminal build

Original tip preserved as tag backup/pre-rebase-upstream-20260524.

src/dialog.rs

@@ -732,11 +732,17 @@ impl App {
     fn rescan_tab(&self, selection_paths: Option<Vec<PathBuf>>) -> Task<Message> {
         let location = self.tab.location.clone();
         let icon_sizes = self.tab.config.icon_sizes;
+        #[cfg(feature = "gvfs")]
         let mounter_items = self.mounter_items.clone();
         Task::future(async move {
             let location2 = location.clone();
             match tokio::task::spawn_blocking(move || location2.scan(icon_sizes)).await {
-                Ok((parent_item_opt, mut items)) => {
+                Ok((parent_item_opt, items)) => {
+                    #[cfg(feature = "gvfs")]
+                    let mut items = items;
+                    #[cfg(not(feature = "gvfs"))]
+                    let items = items;
+
                     #[cfg(feature = "gvfs")]
                     {
                         let mounter_paths: Box<[_]> = mounter_items