launch sizing
Players who specifically prefer the literal 1280×800 baseline on
every fresh-install launch had no way to opt out of the v0.19.0
smart-default sizer. Adds a Gameplay-section toggle (mirrors the
"Winnable deals only" pattern) so they can flip it off.
- New `Settings::disable_smart_default_size: bool` field with
`#[serde(default)]` so legacy `settings.json` files load to the
shipped behaviour (smart sizer enabled).
- Settings panel gains a "Smart window size" row with ON/OFF label
inverting the negative flag, and a tooltip clarifying that saved
window geometry always wins over both branches.
- `solitaire_app::main` reads the flag once at startup and skips
the `apply_smart_default_window_size` registration when it's set.
Mid-session changes apply on next launch (documented on the
field).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
funman300
e1b8766e15