feat: Add GraphQL to C++ code generation for ESP32 firmware

.gitignore

@@ -49,6 +49,10 @@ embedded/**/.pio
 embedded/**/.vscode
 !embedded/**/.vscode/extensions.json
 
+# Generated GraphQL types (regenerated from schema during build)
+embedded/libs/graphql-types/src/graphql_types.h
+embedded/libs/graphql-types/.schema_hash
+
 # backend
 packages/backend/dist
 

embedded/libs/graphql-types/library.json

@@ -0,0 +1,19 @@
+{
+  "name": "graphql-types",
+  "version": "1.0.0",
+  "description": "Auto-generated GraphQL types for ESP32 controller firmware",
+  "keywords": ["graphql", "types", "codegen", "esp32"],
+  "authors": {
+    "name": "BoardSesh"
+  },
+  "frameworks": ["arduino"],
+  "platforms": ["espressif32"],
+  "dependencies": {
+    "bblanchon/ArduinoJson": "^7.0.0"
+  },
+  "build": {
+    "flags": [
+      "-I src"
+    ]
+  }
+}

embedded/libs/led-controller/src/led_controller.h

@@ -7,14 +7,19 @@
 #define MAX_LEDS 500
 
 /**
- * LED command structure matching GraphQL LedCommand type
+ * LED command structure matching GraphQL LedCommand type.
+ * This is defined here for native test compatibility.
+ * The same struct is also generated in graphql_types.h with include guards.
  */
+#ifndef LEDCOMMAND_DEFINED
+#define LEDCOMMAND_DEFINED
 struct LedCommand {
-    int position;
+    int32_t position;
     uint8_t r;
     uint8_t g;
     uint8_t b;
 };
+#endif
 
 class LedController {
 public:

embedded/projects/board-controller/platformio.ini

@@ -22,13 +22,17 @@ lib_deps =
     graphql-ws-client=symlink://../../libs/graphql-ws-client
     nordic-uart-ble=symlink://../../libs/nordic-uart-ble
     esp-web-server=symlink://../../libs/esp-web-server
+    graphql-types=symlink://../../libs/graphql-types
     ; External libraries from PlatformIO registry
     fastled/FastLED@^3.6.0
     bblanchon/ArduinoJson@^7.0.0
     links2004/WebSockets@^2.4.0
     tzapu/WiFiManager@^2.0.17
     h2zero/NimBLE-Arduino@^1.4.1
 
+; Pre-build script for GraphQL type generation
+extra_scripts = pre:../../scripts/prebuild.py
+
 build_flags =
     -D CORE_DEBUG_LEVEL=3
     -D CONFIG_NIMBLE_CPP_ATT_VALUE_INIT_LENGTH=512