Add Move/Copy/Symlink rename actions, with undo support for all three

- renamr-core::rename: new RenameAction enum (Move/Copy/Symlink, default Move,
  mirroring net.filebot.cli.CmdlineOperations's --action modes). execute_renames() now
  takes an action applied to the whole batch. Copy uses fs::copy (source untouched);
  Symlink uses std::os::unix::fs::symlink / std::os::windows::fs::symlink_file behind a
  cfg(unix)/cfg(windows) split. Same conflict policy (skip, never overwrite) and
  auto-created destination folders apply to all three actions. 8 new tests.
- renamr-core::history: HistoryBatch now records which action produced it
  (#[serde(default)] so old history.json entries - all implicitly Move - still
  deserialize). revert_one() branches on it: Move still moves the file back; Copy/
  Symlink undo by deleting the copy/symlink (using symlink_metadata so a broken link is
  still recognized as present and removable) - the original was never touched by those
  actions, so there's nothing to move back. 3 new tests.
- src-tauri: execute_rename command takes the chosen action and threads it through to
  both execute_renames and record_batch.
- Frontend: a Move/Copy/Symlink segmented selector in the "Confirm Rename" modal
  (remembered across modal opens, defaults to Move), action-aware subtitle/button
  copy, and a status message using the right verb (Renamed/Copied/Symlinked). Only Move
  reconciles a loaded item's id/name/bindings to the new path afterward, since Copy/
  Symlink leave the source file exactly where it was. History panel now shows a Copy/
  Symlink badge on non-Move batches and explains what Undo does for each.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

src/components/RenamePanel.css

@@ -459,6 +459,44 @@
   color: var(--aurora-cyan);
 }
 
+.action-segmented {
+  display: flex;
+  gap: 4px;
+  margin: 2px 0 12px;
+  padding: 3px;
+  background: var(--surface);
+  border: 1px solid var(--surface-deep);
+  border-radius: 10px;
+}
+
+.action-segmented-option {
+  all: unset;
+  box-sizing: border-box;
+  flex: 1 1 0;
+  text-align: center;
+  padding: 7px 0;
+  border-radius: 7px;
+  font-size: 12.5px;
+  font-weight: 600;
+  color: var(--muted-text);
+  cursor: pointer;
+}
+
+.action-segmented-option:hover {
+  color: var(--text);
+}
+
+.action-segmented-option.selected {
+  background: var(--aurora-green);
+  color: var(--dock-deep);
+}
+
+.action-segmented-option:disabled {
+  opacity: 0.6;
+  cursor: default;
+  pointer-events: none;
+}
+
 .modal-field-label {
   display: block;
   font-size: 11px;