v0.7.4 — wake: 250ms delay between text and Enter

@Petrus reported 'tmux check rooms with no Enter' — typed text appears in Claude desktop app's prompt input but Enter doesn't actually submit the turn. Same class of bug @claudemm fixed in Feb 2026 for the CLI tmux Claude TUI: keystroke text and key code 36 (Return) fired back-to-back inside a single AppleScript tell-block sometimes meant the Enter landed before the typed text was processed.

Fix: split into two tell-blocks with a 250ms delay between. Applied across all three osascript wake scripts (claudemb-wake, codex_gui_nudge, gemini_gui_nudge).