v0.4.5

• Adds native expandable cards for context budgets, notes, history, and context requests, with compact previews, result counts, and visible page ranges and continuation offsets.
• Keeps committed context-window handoffs and checkpoint reminders compact until expanded. Model-visible tool text, prompts, context policy, and stored note/history content are unchanged.
• Corrects update instructions to require restarting Pi to load new extension code.