termi: Skill for Cursor

This is the Phase 1c "cheapest, highest-visibility win" item — pure Compose UI, no Rust changes needed. CommandToolbar.kt already has Esc/Home/End buttons and the basic Ctrl+C/D/Z/Tab/arrow buttons; this skill covers the two remaining pieces.

1. Sticky-Ctrl modifier

Goal: tap "Ctrl" once, it visually arms, the next character typed sends that character's control code instead of the literal character, then it disarms automatically.

// In TerminalScreen.kt (or wherever CommandToolbar is hosted) —
// this state needs to live above the toolbar since it also affects how
// regular keyboard input is interpreted, not just toolbar buttons:
var ctrlArmed by remember { mutableStateOf(false) }

// Toolbar button:
ToolbarButton(
    text = "Ctrl",
    // Use a different visual state when armed — e.g. filled vs outlined —
    // so the user has clear feedback the modifier is "waiting."
    onClick = { ctrlArmed = !ctrlArmed }
)

// Wherever regular character input is sent to the PTY (likely in
// TerminalViewModel or the text input handler in TerminalView.kt):
fun sendChar(c: Char) {
    if (ctrlArmed) {
        val controlCode = (c.uppercaseChar().code - 'A'.code + 1)
        if (controlCode in 1..26) {
            onCommand(controlCode.toChar().toString())
        }
        ctrlArmed = false  // disarm after one use
    } else {
        onCommand(c.toString())
    }
}

Check TerminalViewModel.kt and TerminalView.kt for where character input actually currently gets sent to the PTY before wiring this in — the sketch above assumes a single sendChar/onCommand chokepoint, which may need confirming against the actual current implementation.

2. Swipe-based history cycling

Goal: swipe left/right on the toolbar area to cycle command history, as an alternative to repeatedly tapping ↑/↓.

import androidx.compose.foundation.gestures.detectHorizontalDragGestures
import androidx.compose.ui.input.pointer.pointerInput

Row(
    modifier = modifier
        .fillMaxWidth()
        .pointerInput(Unit) {
            detectHorizontalDragGestures { change, dragAmount ->
                change.consume()
                if (dragAmount > 20) onArrowUp()   // swipe right → older
                else if (dragAmount < -20) onArrowDown()  // swipe left → newer
            }
        }
        // ...existing modifiers (background, horizontalScroll, padding)
) { /* existing buttons */ }