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* fix(terminal): send SGR mouse wheel reports with the button codes apps expect xterm.dart 4.0.0 encodes the wheel buttons as 64+4..64+7 rather than 64+0..64+3, so the low bits land on the modifier field and every wheel report the terminal emits reads as wheel-with-Shift. Strict full-screen applications reject the modified event, which is why neither the mouse wheel nor the trackpad scrolls anything once the peer application takes over the alternate screen. Install a mouse handler that keeps every upstream reporting decision and only re-encodes the wheel buttons as 64..67. Non-wheel reports pass through untouched, and the emitted bytes stay identical once upstream ships the same fix, so this can be dropped without a behavior change. Upstream: TerminalStudio/xterm.dart#238 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix(terminal): correct the wheel report row, drop the wasted report build Address review feedback on the wheel button fix: - The X10/utf row was encoded as `32 + y + 1` while y is already 1-based, so every normal-mode report pointed one row too low and the `y > limit` guard disagreed with what it emitted. - Gate the wheel path on `mouseMode.reportScroll` and the button state instead of building and discarding a full report string from `defaultMouseHandler` on every scroll tick. This also makes the hardcoded SGR 'M' provably right, since a wheel release now returns before the report is built. - Derive the wire code as `id - 4` and drop `_wheelButtonId`, whose `default` branch was unreachable and defeated enum exhaustiveness. - Assign `mouseHandler` after construction so the `Terminal(...)` line stays untouched. Cover the utf, urxvt, null-byte overflow and click-only branches, and assert that TerminalModel actually installs the handler. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com>