[UX] oclite: Spinner/feedback needed after command submission

[randomm]

Problem

After typing a command (e.g. /start) or a message and pressing Enter, oclite shows a blank screen with no feedback for up to a minute while the LLM starts thinking. Users have no indication anything is happening.

Expected

Immediately show a spinner or Thinking... indicator after command submission, before any LLM response arrives.

Screenshots

See PR #53 discussion — blank screen after /start command.

Files

• packages/opencode/src/cli/lite/index.ts — handleMessage() and handleCustomCommand()
• packages/opencode/src/cli/lite/session.ts — streaming generators

[randomm]

Completed in commit 14244a5. Spinner with 50ms animation speed and elapsed time display.