fix: use native Tauri clipboard plugin on all platforms (fixes terminal copy/paste on Windows)

[baoyu0]

Problem

The terminal clipboard functions (writeTerminalClipboard, readTerminalClipboard, writeSystemClipboard) only used the native @tauri-apps/plugin-clipboard-manager on Linux via an IS_LINUX guard. On Windows and macOS they fell back to navigator.clipboard.writeText(), which silently fails in Tauri's WebView2 renderer (and macOS WKWebView), making:

• Ctrl+Shift+C / Ctrl+Shift+V keyboard copy/paste
• OSC 52 clipboard operations (SSH remote clipboard)
• Right-click context menu copy (in some configurations)

all non-functional on Windows.

The .catch(() => {}) in the existing code swallows the error, so users see no feedback — the copy/paste just silently does nothing.

Root Cause

terminalClipboard.ts had exclusive Linux guard:

if (IS_LINUX) {
  // try native plugin
}
// fallback: navigator.clipboard (fails in WebView2 on Windows)

osc-handlers.ts had no native plugin path at all — it always called navigator.clipboard.writeText() directly.

Fix

1. src/modules/terminal/lib/terminalClipboard.ts — Remove the IS_LINUX guard. Try the native @tauri-apps/plugin-clipboard-manager on every platform first, with navigator.clipboard as a last-resort fallback for non-Tauri environments (e.g. unit tests, dev in plain browser).

2. src/modules/terminal/lib/osc-handlers.ts — Update writeSystemClipboard to use the native plugin with the same try/catch pattern.

The @tauri-apps/plugin-clipboard-manager is already a dependency in package.json — no new dependencies needed.

Related Issues

• Closes Ctrl+C triggers termination instead of copy, and Ctrl+V doesn't work inside coding agents (Claude Code, OpenCode) #240 (Ctrl+C/V not working in coding agents)
• Closes Terax terminal pane swallows Ctrl+C / Ctrl+V when Claude Code is running #542 (terminal pane swallows Ctrl+C/V in Claude Code)
• Closes Add PuTTY / Windows Terminal style right-click copy-paste behavior #563 (right-click copy-paste enhancement — the native clipboard path is the same one the right-click menu already uses via muda)

Summary by CodeRabbit

• Bug Fixes
  • Improved clipboard reliability by trying the app’s native clipboard integration first, with a browser-based fallback if needed.
  • Made clipboard reading and writing work more consistently across platforms.
  • Enhanced terminal clipboard parsing to better handle encoded content and file path detection.

[coderabbitai]

Caution

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📝 Walkthrough

Walkthrough

OSC7 CWD path parsing uses a revised file:// regex, OSC52 clipboard payload strips whitespace before base64 validation, and clipboard read/write functions across osc-handlers.ts and terminalClipboard.ts now prefer the Tauri clipboard-manager plugin (dynamic import) before falling back to navigator.clipboard, removing prior Linux-only gating.

Changes

Clipboard and OSC parsing fixes

Layer / File(s)	Summary
OSC7/OSC52 parsing and system clipboard write src/modules/terminal/lib/osc-handlers.ts	parseOsc7 uses a revised `file://` regex to extract the CWD path, parseOsc52Clipboard strips whitespace before base64 validation, and writeSystemClipboard tries the Tauri clipboard plugin via dynamic import before falling back to `navigator.clipboard.writeText`.
Terminal clipboard read/write via Tauri plugin src/modules/terminal/lib/terminalClipboard.ts	readTerminalClipboard and writeTerminalClipboard drop the Linux-only gating and unconditionally try the Tauri clipboard plugin first, falling back to `navigator.clipboard` on failure.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• crynta/terax-ai#821: Same OSC52 base64 normalization and `writeSystemClipboard` Tauri-first logic in `osc-handlers.ts`.
• crynta/terax-ai#895: Same Tauri-first/navigator-fallback rework of `readTerminalClipboard`/`writeTerminalClipboard` in `terminalClipboard.ts`.

Poem:

A rabbit hopped past WebView2's wall,
where clipboard signals used to stall.
Now Tauri's plugin leads the way,
navigator waits, just in case, to save the day.
Ctrl+C, Ctrl+V, copy and paste — hooray! 🐇📋

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