shed local vendors: stb + kb_text_shape + file_utils now ship with sx

The local vendors/ copies existed because the old modules/ffi/stb*.sx
resolved C paths CWD-relative, forcing every consumer to carry
identically-named copies. sx now ships these as proper library vendors
(#import "vendors/<name>/<name>.sx"), so the copies and the retired
ffi module imports both go. Verified: sx build --target ios-sim
bundles M3te.app; tools/run_tests.sh 23/23.

board_fx.sx

@@ -13,7 +13,7 @@
 #import "modules/std.sx";
 #import "modules/math";
 #import "modules/ffi/opengl.sx";
-#import "modules/ffi/stb.sx";
+#import "vendors/stb_image/stb_image.sx";
 #import "modules/gpu/types.sx";
 #import "modules/gpu/api.sx";
 #import "modules/ui/types.sx";

board_view.sx

@@ -7,7 +7,7 @@
 #import "modules/std.sx";
 #import "modules/math";
 #import "modules/ffi/opengl.sx";
-#import "modules/ffi/stb.sx";
+#import "vendors/stb_image/stb_image.sx";
 #import "modules/gpu/types.sx";
 #import "modules/gpu/api.sx";
 #import "modules/ui/types.sx";

main.sx

@@ -4,8 +4,10 @@
 #import "modules/ffi/opengl.sx";
 #import "modules/ffi/sdl3.sx";
 #import "modules/math";
-#import "modules/ffi/stb.sx";
-#import "modules/ffi/stb_truetype.sx";
+#import "vendors/stb_image/stb_image.sx";
+#import "vendors/stb_truetype/stb_truetype.sx";
+#import "vendors/kb_text_shape/kb_text_shape.sx";
+#import "vendors/file_utils/file_utils.sx";
 #import "modules/gpu/api.sx";
 #import "modules/gpu/types.sx";
 #import "modules/gpu/metal.sx";

tools/key_particle.sx

@@ -20,7 +20,7 @@
 // never hits this — its loops run over 64 board cells, not millions of pixels.
 #import "modules/std.sx";
 #import "modules/math";
-#import "modules/ffi/stb.sx";
+#import "vendors/stb_image/stb_image.sx";
 
 SRC_PATH :: "/Users/agra/Downloads/m3te_particle.png";
 OUT_PATH :: "assets/fx/particle.png";

vendors/file_utils/file_utils.c

@@ -1,55 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifdef __ANDROID__
-#include <android/asset_manager.h>
-
-// Caller-installed AAssetManager pointer. Chess's android_main extracts
-// it from `app->activity->assetManager` (via sx-side platform module's
-// `g_android_asset_manager` global) and feeds it here once at startup.
-// Until the setter has been called, Android falls through to fopen —
-// gives a predictable "file not found" rather than a NULL-deref.
-static AAssetManager* g_aam = NULL;
-
-void sx_android_set_asset_manager(void* m) {
-    g_aam = (AAssetManager*)m;
-}
-#endif
-
-unsigned char* read_file_bytes(const char* path, int* out_size) {
-#ifdef __ANDROID__
-    if (g_aam != NULL) {
-        // AAssetManager paths are relative to the APK's `assets/`
-        // directory. Strip a leading "assets/" so callers can use the
-        // same paths across iOS/macOS/Android (those platforms read
-        // assets via `assets/...` rooted in the bundle or CWD).
-        const char* lookup = path;
-        if (strncmp(path, "assets/", 7) == 0) {
-            lookup = path + 7;
-        }
-        AAsset* a = AAssetManager_open(g_aam, lookup, AASSET_MODE_BUFFER);
-        if (a != NULL) {
-            off_t n = AAsset_getLength(a);
-            *out_size = (int)n;
-            unsigned char* buf = (unsigned char*)malloc((size_t)n);
-            if (buf != NULL) {
-                memcpy(buf, AAsset_getBuffer(a), (size_t)n);
-            }
-            AAsset_close(a);
-            return buf;
-        }
-        // Falls through to fopen — useful when assets land in the data
-        // dir via extraction or app updates.
-    }
-#endif
-    FILE* f = fopen(path, "rb");
-    if (!f) return 0;
-    fseek(f, 0, SEEK_END);
-    *out_size = (int)ftell(f);
-    fseek(f, 0, SEEK_SET);
-    unsigned char* buf = (unsigned char*)malloc(*out_size);
-    fread(buf, 1, *out_size, f);
-    fclose(f);
-    return buf;
-}

vendors/file_utils/file_utils.h

@@ -1,13 +0,0 @@
-#ifndef FILE_UTILS_H
-#define FILE_UTILS_H
-
-unsigned char* read_file_bytes(const char* path, int* out_size);
-
-#ifdef __ANDROID__
-// Install the AAssetManager that `read_file_bytes` consults for paths
-// rooted inside the APK. Caller is responsible for passing the manager
-// from `ANativeActivity->assetManager` before any read_file_bytes call.
-void sx_android_set_asset_manager(void* m);
-#endif
-
-#endif

vendors/kb_text_shape/kb/LICENSE

@@ -1,19 +0,0 @@
-zlib License
-
-(C) Copyright 2024-2025 Jimmy Lefevre
-
-This software is provided 'as-is', without any express or implied
-warranty.  In no event will the authors be held liable for any damages
-arising from the use of this software.
-
-Permission is granted to anyone to use this software for any purpose,
-including commercial applications, and to alter it and redistribute it
-freely, subject to the following restrictions:
-
-1. The origin of this software must not be misrepresented; you must not
-  claim that you wrote the original software. If you use this software
-  in a product, an acknowledgment in the product documentation would be
-  appreciated but is not required.
-2. Altered source versions must be plainly marked as such, and must not be
-  misrepresented as being the original software.
-3. This notice may not be removed or altered from any source distribution.

vendors/kb_text_shape/kb_text_shape_impl.c

@@ -1,2 +0,0 @@
-#define KB_TEXT_SHAPE_IMPLEMENTATION
-#include "kb/kb_text_shape.h"

vendors/kb_text_shape/kbts_api.h

@@ -1,15 +0,0 @@
-// Minimal API declarations for SX import.
-// Only the functions/types we actually use — avoids parsing the full 30k-line header.
-
-typedef struct kbts_shape_context kbts_shape_context;
-typedef struct kbts_font kbts_font;
-
-kbts_shape_context *kbts_CreateShapeContext(void *Allocator, void *AllocatorData);
-void kbts_DestroyShapeContext(kbts_shape_context *Context);
-kbts_font *kbts_ShapePushFontFromMemory(kbts_shape_context *Context, void *Memory, int Size, int FontIndex);
-void kbts_GetFontInfo2(kbts_font *Font, void *Info);
-void kbts_ShapeBegin(kbts_shape_context *Context, unsigned int ParagraphDirection, unsigned int Language);
-void kbts_ShapeUtf8(kbts_shape_context *Context, const char *Utf8, int Length, unsigned int UserIdGenerationMode);
-void kbts_ShapeEnd(kbts_shape_context *Context);
-int kbts_ShapeRun(kbts_shape_context *Context, void *Run);
-int kbts_GlyphIteratorNext(void *It, void **Glyph);

vendors/stb_image/stb_image_impl.c

@@ -1,2 +0,0 @@
-#define STB_IMAGE_IMPLEMENTATION
-#include "stb_image.h"

vendors/stb_image/stb_image_write_impl.c

@@ -1,2 +0,0 @@
-#define STB_IMAGE_WRITE_IMPLEMENTATION
-#include "stb_image_write.h"

vendors/stb_truetype/stb_truetype_impl.c

@@ -1,2 +0,0 @@
-#define STB_TRUETYPE_IMPLEMENTATION
-#include "stb_truetype.h"