Issue for this PR

Closes #35246

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

Shell commands that redraw progress on one terminal line, like Python tqdm, can spam repeated carriage-return frames into the TUI and final tool output.

This adds a small shell progress parser, publishes bounded semantic progress snapshots through the existing Tool.Progress event, compacts repeated progress frames from final bash output, and renders running shell progress as a compact TUI progress line.

Ordinary shell output is preserved when no repeated progress frames are detected.

How did you verify your code works?

• npm exec --yes bun@1.3.14 -- --cwd packages/core test test/tool-shell-progress.test.ts test/tool-bash.test.ts test/session-tool-progress.test.ts
• npm exec --yes bun@1.3.14 -- run typecheck --filter @opencode-ai/core
• npm exec --yes bun@1.3.14 -- run typecheck --filter @opencode-ai/tui
• pre-push hook: bun turbo typecheck

Screenshots / recordings

Not included. This is a terminal TUI rendering change; the parser/output behavior is covered by tests and the TUI path by typecheck.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR