fix: leftover inject value stoi abort

[tonycoder-hub]

Summary

InjectionEventDispatch::CheckValue (tools/event_inject) length-caps at 11 then digit-checks and calls std::stoi. Values like 2147483648 / -2147483649 still throw std::out_of_range and can abort event_inject.

A from_chars lambda was already present but unused (and missing a semicolon, so the translation unit does not compile as written). Finish the migration: parse with ParseInjectValue (std::from_chars) like the sibling tools/inject_event InputSendeventCommand::CheckValue, and reject overflow/junk without throwing.

Host test

g++ -std=c++17 -fsanitize=address,undefined -Itools/event_inject/include \
  test/hosttest/parse_inject_value_host_test.cpp -o /tmp/parse_inject_value_host_test
/tmp/parse_inject_value_host_test

Covers INT32 min/max, empty/junk, 2147483648, -2147483649, 11×9. asan/ubsan clean. Also shows bare stoi still throws on those overflow strings.

Test plan

• Host helper + asan/ubsan
• Valid inject value 0 / -1 / 2147483647 still accepted
• Overflow digit strings no longer abort event_inject

Signed-off-by: Tony Coder 407243179@qq.com