Add Esc/Del and Ctrl/Alt modifier support to terminal toolbar

[ThalesMMS]

Summary

• Add Esc and Del buttons to the terminal keyboard toolbar.
• Add Ctrl/Alt modifier toggles with active-state UI and generation tracking.
• Apply modifier logic to terminal input (single chars, CSI/SS3 sequences) in the JS terminal layer.
• Sync modifier resets between JS and Swift via notifications; reset modifiers after input or blur.

Changes

Terminal keyboard toolbar (TerminalKeyboardToolbar.swift):

• Add controlActive/altActive state plus generation counters.
• Add helpers to send input or cursor moves and then reset modifier state, plus a dedicated reset function.
• Insert Esc, Ctrl, Alt, and Del buttons with accessibility labels and active-state highlighting for modifiers.
• Route paste/tab/arrow actions through the modifier-reset helpers; reset modifiers on blur.
• Listen for terminalControlReset/terminalAltReset notifications to clear the UI state when JS resets.

Terminal JavaScript (terminal.bundle/index.html):

• Track modifier state and generation, expose setControlActive/setAltActive.
• Apply Control/Alt to input, including CSI/SS3 sequences, and avoid applying modifiers to non-modifiable sequences.
• Reset modifier state after use and notify Swift with generation-aware reset events.
• Apply modifier processing inside term.onData before posting input to Swift.

Terminal instance (TerminalInstance.swift):

• Handle ControlReset/AltReset messages from JS and post notifications with generation info.
• Add methods to set Control/Alt state in the JS runtime.
• Add terminalControlReset/terminalAltReset notification names.

[Copilot]

Pull request overview

This PR adds Esc and Ctrl key buttons to the terminal keyboard toolbar, enhancing terminal control capabilities on mobile devices. The Ctrl key features a toggle state with visual feedback and automatically resets after key presses.

Changes:

• Added Esc button to send escape character to terminal
• Added Ctrl button with toggle behavior and visual state
• Implemented control character encoding (Ctrl+key combinations)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
Dependencies/terminal.bundle/index.html	Added JavaScript functions for control state management and control character encoding
CodeApp/Views/TerminalKeyboardToolbar.swift	Added UI buttons for Esc and Ctrl keys with state management and notification handling
CodeApp/Managers/TerminalInstance.swift	Added Swift methods to sync control state with JavaScript and handle control reset events

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 7 comments.

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[bummoblizard]

Thank you! I will review the changes in a bit

[ThalesMMS]

Thank you! I will review the changes in a bit

Please let me know if you think it needs changes.