bugfix(file): Case-correct the leading component of a relative path

Backported from bobtista/topic/trunk, which hit and fixed this on Linux on
29/07/2026. This branch forked before that and never picked it up.

fixFilenameFromWindowsPath copied the first component of a relative path
through verbatim before starting its case-insensitive traversal, so a
mis-cased leading directory could never be repaired. SidesList spells the
skirmish scripts path "data\Scripts\SkirmishScripts.scb" with a lowercase d
while it is "Data" on disk, so on a case-sensitive filesystem the open failed.

The skirmish team records are cleared immediately before that parse, so they
stayed empty. Player::initFromDict renames a skirmish AI to
Skirmish<Faction><StartIndex>, deletes the teams owned by its original
player<N> name, then copies its replacement teams out of those records - so
the AI ended up with no teams at all. setDefaultTeam found nothing (its assert
is compiled out of a release build), the AI's default team stayed null, and
its starting Command Center and units were created onto no team of its own.
hasAnyObjects() was therefore false, the AI counted as defeated on the first
frame, and the human won instantly.

Windows, macOS (case-insensitive APFS) and WSL over /mnt/c all hid this. It
reproduces on wasm, where MEMFS is case-sensitive, in this port and in the
vibecode port alike - confirmed by making the lowercase path resolve at
runtime and watching the same binary play normally.

This reverts the path-literal spelling fix that preceded it, so the file
system layer stays the single fix and this branch matches trunk exactly.

Author: githubawn

Core/GameEngineDevice/Source/StdDevice/Common/StdLocalFileSystem.cpp

@@ -134,13 +134,6 @@ static std::filesystem::path fixFilenameFromWindowsPath(const Char *filename, In
 		for (auto p : path)
 		{
 			std::filesystem::path pathFixedPart;
-			if (pathCurrent.empty())
-			{
-				// Load the first part of the path
-				pathFixed /= p;
-				pathCurrent /= p;
-				continue;
-			}
 
 			if (std::filesystem::exists(pathCurrent / p, ec))
 			{
@@ -152,8 +145,16 @@ static std::filesystem::path fixFilenameFromWindowsPath(const Char *filename, In
 			}
 			else
 			{
-				// Check if the subpath exists using case-insensitive comparison
-				for (auto& entry : std::filesystem::directory_iterator(pathFixed, ec))
+				// Check if the subpath exists using case-insensitive comparison.
+				// TheSuperHackers @bugfix bobtista 29/07/2026 Scan the working
+				// directory for the leading component of a relative path. It used to
+				// be copied through verbatim, so on a case-sensitive filesystem a
+				// literal such as "data\Scripts\SkirmishScripts.scb" never matched an
+				// on-disk "Data" and the open failed, leaving skirmish games with no
+				// scripts and no teams on Linux. Windows and macOS hid the bug behind
+				// a case-insensitive filesystem.
+				const std::filesystem::path scanDir = pathFixed.empty() ? std::filesystem::path(".") : pathFixed;
+				for (auto& entry : std::filesystem::directory_iterator(scanDir, ec))
 				{
 					if (strcasecmp(entry.path().filename().string().c_str(), p.string().c_str()) == 0)
 					{

Generals/Code/GameEngine/Source/GameLogic/Map/SidesList.cpp

@@ -507,13 +507,7 @@ void SidesList::prepareForMP_or_Skirmish()
 		}
 	}
 	if (!gotScripts) {
-		// TheSuperHackers @bugfix 31/07/2026 Spell the directory "Data", the way it is on disk
-		// and the way every other path literal in the engine spells it. Windows does not care,
-		// but on a case-sensitive filesystem this open failed, and because the skirmish team
-		// records are cleared just above, the skirmish AI was left with no teams at all. Its
-		// default team then never resolved, its starting Command Center and units belonged to
-		// no team of its own, and it counted as defeated on the first frame - an instant win.
-		AsciiString path = "Data\\Scripts\\SkirmishScripts.scb";
+		AsciiString path = "data\\Scripts\\SkirmishScripts.scb";
 		DEBUG_LOG(("Skirmish map using standard scripts"));
 		m_skirmishTeamrec.clear();
 		CachedFileInputStream theInputStream;

GeneralsMD/Code/GameEngine/Source/GameLogic/Map/SidesList.cpp

@@ -526,13 +526,7 @@ void SidesList::prepareForMP_or_Skirmish()
 		}
 	}
 	if (!gotScripts) {
-		// TheSuperHackers @bugfix 31/07/2026 Spell the directory "Data", the way it is on disk
-		// and the way every other path literal in the engine spells it. Windows does not care,
-		// but on a case-sensitive filesystem this open failed, and because the skirmish team
-		// records are cleared just above, the skirmish AI was left with no teams at all. Its
-		// default team then never resolved, its starting Command Center and units belonged to
-		// no team of its own, and it counted as defeated on the first frame - an instant win.
-		AsciiString path = "Data\\Scripts\\SkirmishScripts.scb";
+		AsciiString path = "data\\Scripts\\SkirmishScripts.scb";
 		DEBUG_LOG(("Skirmish map using standard scripts"));
 		m_skirmishTeamrec.clear();
 		CachedFileInputStream theInputStream;