fix(mac): Correct lib_hash include path for system-libs build

The include "../lib_hash/sha2.h" in params.c requires an include path
that makes "../lib_hash" resolve to "thirdparty/lib_hash".

Changed -I../src/lib_hash (which doesn't exist) to
-I../src/thirdparty/lib_hash. With this path, the compiler searches
for "../lib_hash/sha2.h" as:
  ../src/thirdparty/lib_hash/../lib_hash/sha2.h
  = ../src/thirdparty/lib_hash/sha2.h ✓

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: cfsmp3

mac/build.command

@@ -67,15 +67,17 @@ fi
 # Set up include paths based on whether we're using system libs or bundled
 if [[ "$USE_SYSTEM_LIBS" == "true" ]]; then
     # Use system libraries via pkg-config (for Homebrew compatibility)
-    BLD_INCLUDE="-I../src/ -I../src/lib_ccx -I../src/lib_hash -I../src/thirdparty"
+    # Note: -I../src/thirdparty/lib_hash is needed so that "../lib_hash/sha2.h" resolves correctly
+    # (the .. goes up from lib_hash to thirdparty, then lib_hash/sha2.h finds the file)
+    BLD_INCLUDE="-I../src/ -I../src/lib_ccx -I../src/thirdparty/lib_hash -I../src/thirdparty"
     BLD_INCLUDE="$BLD_INCLUDE $(pkg-config --cflags --silence-errors freetype2)"
     BLD_INCLUDE="$BLD_INCLUDE $(pkg-config --cflags --silence-errors gpac)"
     BLD_INCLUDE="$BLD_INCLUDE $(pkg-config --cflags --silence-errors libpng)"
     BLD_INCLUDE="$BLD_INCLUDE $(pkg-config --cflags --silence-errors libprotobuf-c)"
     BLD_INCLUDE="$BLD_INCLUDE $(pkg-config --cflags --silence-errors libutf8proc)"
 else
     # Use bundled libraries (default for standalone builds)
-    BLD_INCLUDE="-I../src/ -I../src/lib_ccx -I../src/lib_hash -I../src/thirdparty/libpng -I../src/thirdparty -I../src/thirdparty/zlib -I../src/thirdparty/freetype/include $(pkg-config --cflags --silence-errors gpac)"
+    BLD_INCLUDE="-I../src/ -I../src/lib_ccx -I../src/thirdparty/lib_hash -I../src/thirdparty/libpng -I../src/thirdparty -I../src/thirdparty/zlib -I../src/thirdparty/freetype/include $(pkg-config --cflags --silence-errors gpac)"
 fi
 
 # Add FFmpeg include path for Mac