v0.4.0

• Added web UI: otaku web opens the same session in a browser — the second frontend, over the
  same stories, the same lore and the same commands.
• Added native Windows support (10 and 11, 64-bit only).
• The context builder is reworked from the ground up, after docs/context_design.md; the new
  max_context setting keeps the prompt inside the window models still handle well for roleplay.
• The lore browser in terminal (/lore, /cast) is reworked to include the system message and
  the story messages.
• Prompt caching for OpenRouter.
• Sound notifications.
• A second, longer sample story.