fix: respect --name flag when creating new panes (#4979)

* fix: respect --name flag when creating and renaming panes

Three issues fixed:

1. Pane creation: --name was silently discarded for default shell panes
   because use_terminal_title was true. Now user-provided names take
   priority. Also pass initial_pane_title as pane_name to TerminalPane
   constructor (was hardcoded to empty string).

2. CLI rename without --pane-id: was routed through PaneNameInput which
   appends to existing name. Now uses a dedicated RenameActivePane action
   that fully replaces the name, working for any name length including
   single characters.

3. Interactive rename: entering rename mode preserves the existing name
   for editing (append/backspace). Esc reverts to the name before rename
   mode was entered.

Adds 28 tests covering rename semantics, interactive editing, undo,
OSC title interaction, and a wire-level IPC round-trip test.

* refactor: route active-pane rename via Option<PaneId>

Replace the dedicated Action::RenameActivePane variant with an
Option<PaneId> on the existing Action::RenamePaneByPaneId. route.rs
dispatches None to the server-internal ScreenInstruction::RenameActivePane
and Some(id) to the existing RenamePaneWithPaneId path.

Drops all proto/conversion boilerplate for the removed variant: plugin
API additions, IPC tag 137, and both directions of the wire conversion.

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Co-authored-by: divens <divens.dev@gmail.com>

0 files changed, 0 insertions, 0 deletions