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Follow-up on #16020 salvage. Three corrections: 1. Truth signal for /copy Before: success was 'OSC 52 sequence was emitted to stdout'. That's false on local Linux inside tmux (emitSequence=false), so /copy kept printing 'clipboard copy failed' to users whose xclip/wl-copy had already succeeded fire-and-forget. Fix: setClipboard() now returns { sequence, success } where success = native-fired OR tmux-buffer-loaded OR osc52-emitted. copyNative() returns a boolean telling setClipboard whether a native attempt was made. /copy only shows 'failed' when literally no path was taken. 2. Dashboard keybinding Before: Ctrl+C for copy on non-Mac (Ctrl+Shift+C for paste). That swallows SIGINT when a stale selection is present and breaks the xterm/gnome-terminal/konsole/Windows-Terminal convention where Ctrl+C in a terminal emulator is always SIGINT. The real bug was that clipboard writes lost user-gesture through OSC-52 round-trips, which the direct writeText already fixes. Fix: revert copyModifier to Ctrl+Shift+C on non-Mac. Direct writeText in the keydown handler preserves user gesture. term.write Escape replaced with term.clearSelection() (works without relying on TUI input mode). 3. Error toast text Before: 'see HERMES_TUI_DEBUG_CLIPBOARD' — tells users how to debug but not how to fix. Fix: point users at HERMES_TUI_FORCE_OSC52=1 first (the actual escape hatch), mention the debug var second.