Improved Romance Minigame and focus input handling with KBM.

[Zorkats]

Summary

• Improves KBM behavior around romance minigames by tracking romance state explicitly.
• Flushes pending mouse delta/wheel input when entering or leaving romance minigames.
• Makes Windows Alt cursor unlock use live Win32 key state instead of stale ImGui Alt state.
• Fixed some bugs related to KBM not working anymore if you Alt-Tabbed the game.

Changes

File	Change
src/tip_engine/Globals.h	Added shared romance-minigame state and mouse input flushing helpers.
src/tip_engine/hooks.cpp	Updated romance hooks to save/restore video cvars safely and clear romance state on exit.
src/tip_engine/Overlays/TiPTools.cpp	Changed Windows Alt unlock detection to use GetAsyncKeyState(VK_MENU).

Testing

• Romance minigame KBM movement tested.
• Mouse zoom tested after the romance/focus changes.
• Alt unlock tested on Windows.
• Alt-Tab recovery tested together with the Rexglue-side focus fix.

Notes

This PR pairs with the Rexglue KBM/focus commit at https://github.com/SolarCookies/rexglue-sdk/tree/VivaPinata. The TiP-Recomp side handles game-specific state and input flushing; Rexglue handles platform focus/capture recovery.