Fix rewind/resume continuation wording across agents

[blackgirlbytes]

Summary

• change rewind/resume continuation headers to neutral wording that works for both command-based agents and Cursor
• shorten the Cursor-specific continuation text to avoid repeating the session wording
• update the matching resume output tests

Testing

• mise run test -- -run 'TestCursorAgent_FormatResumeCommand|TestDisplayRestoredSessions|TestPrintMultiSessionResumeCommands' ./cmd/entire/cli/...

[Copilot]

Pull request overview

This PR standardizes the “continuation” messaging shown after rewind/resume so it works for both CLI-command agents and GUI agents like Cursor, and updates tests to match the new output.

Changes:

• Update resume/rewind continuation headers to remove “run:” phrasing and use neutral wording.
• Shorten Cursor’s resume instruction text.
• Adjust resume output tests to match updated headers.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
cmd/entire/cli/rewind.go	Updates multi/single-session continuation header text for rewind output.
cmd/entire/cli/resume.go	Updates restored-session continuation headers across resume paths.
cmd/entire/cli/resume_test.go	Updates assertions to match the new continuation header strings.
cmd/entire/cli/agent/cursor/cursor.go	Shortens Cursor resume instruction returned by FormatResumeCommand.