Workspace (client) spec create + edit

- File -> New workspace... (name -> template -> edit -> create & switch)
- File -> Edit current workspace... (edit View/Root/Options as spec text)
- Backend p4 client -o/-i

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

src-tauri/src/lib.rs

@@ -1821,6 +1821,39 @@ async fn p4_latest_change(state: State<'_, AppState>, scope: String) -> Result<V
     Ok(v.into_iter().next().unwrap_or(Value::Null))
 }
 
+/// Get a workspace (client) spec as editable text. An unknown name returns a
+/// fresh template — used to create a new workspace.
+#[tauri::command]
+async fn p4_client_spec(state: State<'_, AppState>, client: String) -> Result<String, String> {
+    let conn = current(&state)?;
+    if client.trim().is_empty() {
+        return Err("No workspace name".into());
+    }
+    run_text(&conn, &["client", "-o", client.trim()])
+}
+
+/// Save a workspace (client) spec (`p4 client -i`). Creates it if new.
+#[tauri::command]
+async fn p4_client_save(state: State<'_, AppState>, spec: String) -> Result<String, String> {
+    let conn = current(&state)?;
+    let mut child = p4_cmd(&conn, false)
+        .args(["client", "-i"])
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()
+        .map_err(|e| format!("Failed to start p4: {e}"))?;
+    if let Some(si) = child.stdin.as_mut() {
+        si.write_all(spec.as_bytes()).map_err(|e| e.to_string())?;
+    }
+    let out = child.wait_with_output().map_err(|e| e.to_string())?;
+    if !out.status.success() {
+        let err = decode(&out.stderr);
+        return Err(if err.trim().is_empty() { decode(&out.stdout).trim().to_string() } else { err.trim().to_string() });
+    }
+    Ok(decode(&out.stdout).trim().to_string())
+}
+
 /// Switch the active workspace (client) without re-authenticating.
 #[tauri::command]
 async fn p4_switch_client(state: State<'_, AppState>, client: String) -> Result<Value, String> {
@@ -2025,6 +2058,8 @@ pub fn run() {
             p4_typemap_set,
             p4_reopen_type,
             p4_sync_to,
+            p4_client_spec,
+            p4_client_save,
             uasset_thumbnail,
             uasset_export_3d,
             p4_shelve,