Remove DPI_AWARE flag and GetVirtualScreenSize workaround

[EthanBlazkowicz]

Remove DPI_AWARE flag and GetVirtualScreenSize workaround

Requires PathOfBuildingCommunity/PathOfBuilding-SimpleGraphic#100

Background

SimpleGraphic PR #100 decoupled the DPI_AWARE flag's dual responsibilities (rendering pipeline vs API contract). The flag now only controls whether the API uses physical or virtual units. PoB works exclusively in virtual units, so the flag is no longer needed.
Additionally, GetScreenSize() now natively returns virtual units regardless of the flag, making the GetVirtualScreenSize() workaround obsolete.

Changes

src/Launch.lua (line 68):

- RenderInit("DPI_AWARE")
+ RenderInit()

src/Modules/Common.lua (lines 978-986):

- function GetVirtualScreenSize()
-     local width, height = GetScreenSize()
-     local scale = GetScreenScale and GetScreenScale() or 1.0
-     if scale ~= 1.0 then
-         width = math.floor(width / scale)
-         height = math.floor(height / scale)
-     end
-     return width, height
- end
+ function GetVirtualScreenSize()
+     return GetScreenSize()
+ end

What this means

Aspect	Before	After
RenderInit	"DPI_AWARE" passed	no flags
GetScreenSize()	returned physical (3840x2160) - workaround divided by scale	returns virtual (1920x1080) natively
GetScreenScale()	returned 2.0 (unchanged)	2.0 (unchanged)
SetDPIScaleOverridePercent()	worked (flag forced scaling on)	works (scaling always active regardless of flag)
Visual scaling	pre-scale coords path	same pre-scale coords path

No other files or callers need changes - all consumers of GetVirtualScreenSize() continue working with the same return values.

1.0 to 3.0 DPI scaling all tested.

Code and PR Co-Written by DeepSeek