fix(detect): update Grok agent detection rules for Grok Build 1.0.x

[jasonchen36]

Problem

Idle Grok Build 1.0.x agents were incorrectly classified as working (yellow filled status indicator in Herdr) when idle at the prompt for two main reasons:

1. prompt_hints_idle only matched ctrl+.:shortcuts, but Grok Build 1.0.x renders Ctrl+x:shortcuts or Shift+Tab:mode in the prompt footer.
2. esc_cancel_hints_working erroneously contained ctrl+.:shortcuts, marking idle prompts as working.
3. osc_progress_working (priority 1150) outranked title/prompt idle rules, but Grok Build 1.0.x emits OSC 9;4;1;-1 during turn execution without sending OSC 9;4;0;0 to clear progress upon yielding.
4. Historical subagent/tool transcript lines (┃ ◆) in scrollback buffer outranked title/prompt idle rules.

Solution

• Added ctrl+x:shortcuts and shift+tab:mode to prompt_hints_idle matcher and boosted its priority to 1160 so idle prompt footers outrank scrollback transcript history.
• Increased osc_title_idle priority to 1140 and made regex case-insensitive and flexible across title variations.
• Removed ctrl+.:shortcuts from esc_cancel_hints_working.
• Deprioritized osc_progress_working to priority 900 below prompt/title idle rules.
• Synchronized src/detect/manifests/grok.toml and website/agent-detection/grok.toml.

Verification

• Verified against live Herdr agent list and pane snapshot outputs.
• Passed python3 scripts/agent_detection_manifest_check.py --require-website.
• Passed python3 scripts/test_agent_detection_manifest_check.py.

[kangal-bot]

Hi @jasonchen36, thanks for your interest in contributing.

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