fix(review): gate wheel forwarding by CLI mode/version, stop link click double-fire (PR #144)

- _shouldForwardWheelToApp: claude sessions forward wheel to the TUI only
  when the banner-parsed cliVersion is known AND >= 2.1.187 (older/unknown
  Claude Code captures wheel as select-menu navigation → keep local
  scrollLines); new dependency-free _cliVersionAtLeast semver-ish compare
- gemini excluded from wheel forwarding entirely (TUI wheel behavior
  unverified); codex keeps forwarding (verified); taps/clicks still
  forwarded for all strip modes
- link double-fire: registerFilePathLinkProvider links now track hover
  state via ILink hover/leave callbacks (_linkHovered) and
  _handleDesktopTerminalClick bails while a link is hovered, so a link
  click no longer also sends a synthetic SGR press/release to the TUI
- help modal: document Shift+Wheel (scroll local history when mouse
  passthrough is active)
- tests: version gate (2.1.186/unknown/garbage no forward, 2.1.187+
  forwards), codex/gemini split, link-hover click suppression

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/web/public/index.html

@@ -560,6 +560,7 @@
             <div><kbd>Alt/Option</kbd>+<kbd>[</kbd> / <kbd>Alt/Option</kbd>+<kbd>]</kbd></div><div>Previous / Next Session</div>
             <div><kbd>Alt/Option</kbd>+<kbd>1-9</kbd></div><div>Switch to Tab N</div>
             <div><kbd>Ctrl</kbd>+<kbd>L</kbd></div><div>Clear Terminal</div>
+            <div><kbd>Shift</kbd>+<kbd>Wheel</kbd></div><div>Scroll local history (when mouse passthrough is active)</div>
             <div><kbd>Ctrl</kbd>+<kbd>+</kbd></div><div>Increase Font</div>
             <div><kbd>Ctrl</kbd>+<kbd>-</kbd></div><div>Decrease Font</div>
             <div><kbd>Ctrl</kbd>+<kbd>?</kbd></div><div>Show Help</div>