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/config.rs

@@ -170,6 +170,11 @@ pub struct Config {
     pub show_details: bool,
     pub show_recents: bool,
     pub tab: TabConfig,
+    /// Yoda phase 3: Dolphin-style quick actions toolbar. An ordered list
+    /// of enabled buttons — position in the vec drives the toolbar order.
+    /// Reorder in Settings via drag-drop; items not in the vec are
+    /// hidden. Default = the minimal-6 set from phase 1.
+    pub toolbar: Vec<ToolbarAction>,
     pub type_to_search: TypeToSearch,
 }
 
@@ -234,11 +239,97 @@ impl Default for Config {
             show_details: false,
             show_recents: true,
             tab: TabConfig::default(),
+            toolbar: default_toolbar(),
             type_to_search: TypeToSearch::Recursive,
         }
     }
 }
 
+/// Yoda phase 3: ordered enum of quick-action toolbar buttons.
+/// The Config stores `Vec<ToolbarAction>` so the user can pick BOTH
+/// visibility (just include/exclude the variant) AND order (position in
+/// the vec). Drag-drop reorder in the Settings page moves items around.
+#[derive(Clone, Copy, Debug, Deserialize, Eq, Hash, PartialEq, Serialize)]
+pub enum ToolbarAction {
+    LocationUp,
+    Reload,
+    NewFolder,
+    NewFile,
+    Rename,
+    Delete,
+    Cut,
+    Copy,
+    Paste,
+    ToggleShowHidden,
+    OpenTerminal,
+}
+
+impl ToolbarAction {
+    /// Stable list of every supported action. Ordered roughly by logical
+    /// grouping (location → create/edit → clipboard → view/misc) so that
+    /// the default enabled set follows a sensible shape and the Settings
+    /// row for a not-yet-enabled action lands in a predictable spot.
+    pub const ALL: &'static [Self] = &[
+        Self::LocationUp,
+        Self::Reload,
+        Self::NewFolder,
+        Self::NewFile,
+        Self::Rename,
+        Self::Delete,
+        Self::Cut,
+        Self::Copy,
+        Self::Paste,
+        Self::ToggleShowHidden,
+        Self::OpenTerminal,
+    ];
+
+    /// u8 discriminant used to carry the action over a DnD mime payload.
+    pub const fn to_u8(self) -> u8 {
+        match self {
+            Self::LocationUp => 0,
+            Self::Reload => 1,
+            Self::NewFolder => 2,
+            Self::NewFile => 3,
+            Self::Rename => 4,
+            Self::Delete => 5,
+            Self::Cut => 6,
+            Self::Copy => 7,
+            Self::Paste => 8,
+            Self::ToggleShowHidden => 9,
+            Self::OpenTerminal => 10,
+        }
+    }
+
+    pub const fn from_u8(v: u8) -> Option<Self> {
+        match v {
+            0 => Some(Self::LocationUp),
+            1 => Some(Self::Reload),
+            2 => Some(Self::NewFolder),
+            3 => Some(Self::NewFile),
+            4 => Some(Self::Rename),
+            5 => Some(Self::Delete),
+            6 => Some(Self::Cut),
+            7 => Some(Self::Copy),
+            8 => Some(Self::Paste),
+            9 => Some(Self::ToggleShowHidden),
+            10 => Some(Self::OpenTerminal),
+            _ => None,
+        }
+    }
+}
+
+/// Default set shown on a fresh install — same "minimal 6" as phase 1/2.
+pub fn default_toolbar() -> Vec<ToolbarAction> {
+    vec![
+        ToolbarAction::NewFolder,
+        ToolbarAction::Rename,
+        ToolbarAction::Delete,
+        ToolbarAction::Cut,
+        ToolbarAction::Copy,
+        ToolbarAction::Paste,
+    ]
+}
+
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq, CosmicConfigEntry, Deserialize, Serialize)]
 #[serde(default)]
 pub struct DesktopConfig {