Apply code review feedback from PR #581

[Copilot]

Addresses review comments from the 4.11 release prep PR.

Changes

• FullscreenGrab zoom handling: Skip transform creation when zooming out at base scale (no-op case)
• GlobalLang exception logging: Add debug output for failed language initialization instead of silent catch
• FullscreenGrab GC removal: Remove forced GC.Collect() calls — let runtime manage memory naturally
• HistoryService resource leak: Dispose CachedBitmap before reassignment to prevent GDI object leak
• Floating point comparison: Use epsilon comparison instead of direct equality check for pan values
• FindAndReplaceWindow style: Refactor two if/else blocks to ternary operators

// Before
if (panX != 0 || panY != 0)

// After
const double Epsilon = 1e-6;
if (Math.Abs(panX) > Epsilon || Math.Abs(panY) > Epsilon)

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