Get Revision: sync workspace to a changelist / label / date

- Actions -> Get Revision... (enter CL number, label, or YYYY/MM/DD)
- History right-click -> Sync workspace to #N
- Backend p4 sync scope@rev with live transfer progress

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src-tauri/src/lib.rs

@@ -485,6 +485,22 @@ async fn p4_sync(state: State<'_, AppState>, scope: String) -> Result<String, St
     Ok(if msg.is_empty() { "Already up to date — nothing to sync.".into() } else { msg })
 }
 
+/// Sync the workspace to an exact revision: a changelist number, a label name,
+/// or a date (`YYYY/MM/DD`). `rev` is appended to the scope spec as `@rev`.
+#[tauri::command]
+async fn p4_sync_to(state: State<'_, AppState>, scope: String, rev: String) -> Result<String, String> {
+    let conn = current(&state)?;
+    let rev = rev.trim();
+    if rev.is_empty() {
+        return Err("No revision specified".into());
+    }
+    // strip a leading @ or # if the user typed one
+    let rev = rev.trim_start_matches(['@', '#']);
+    let spec = format!("{}@{}", scope_spec(&scope), rev);
+    let msg = run_stream(&conn, &["sync", &spec], "sync")?;
+    Ok(if msg.is_empty() { "Already at that revision — nothing to sync.".into() } else { msg })
+}
+
 /// Unified diff of an opened file vs. the have revision.
 #[tauri::command]
 async fn p4_diff(state: State<'_, AppState>, file: String) -> Result<String, String> {
@@ -2008,6 +2024,7 @@ pub fn run() {
             p4_typemap_get,
             p4_typemap_set,
             p4_reopen_type,
+            p4_sync_to,
             uasset_thumbnail,
             uasset_export_3d,
             p4_shelve,