Support Grok 1.0.50

[ReagentX]

• Normalize Grok 1.0.50 title announcements for idle and working states, including session names and status text.
• Report awaiting approval for permission prompts, plan approvals, and Ask questions.
• Add title parsing coverage for every Braille frame, ambiguous status separators, and unsupported title forms.
• Add corpus fixtures for Grok’s titled idle screen and blocked states, and document their matching paths.