updated code logic to pic FW/App version from appversion instead of hard-coding in js/html/cpp files

app_version.py

@@ -0,0 +1,32 @@
+import os
+Import("env")
+
+# Define the folder and filename
+DATA_FOLDER = "data-src"
+FILENAME = "appversion"
+
+# Construct the full path: /your/project/path/data-src/appversion
+project_dir = env.get("PROJECT_DIR")
+version_file_path = os.path.join(project_dir, DATA_FOLDER, FILENAME)
+
+# Default fallback if something goes wrong
+version = "0.0.0"
+
+if os.path.exists(version_file_path):
+    try:
+        with open(version_file_path, "r") as f:
+            version = f.read().strip()
+            # Clean output for the PlatformIO console
+            print(f"--- SUCCESS: Found version {version} in {version_file_path} ---")
+    except Exception as e:
+        print(f"--- ERROR: could not read version file: {e} ---")
+else:
+    print(f"--- ERROR: File NOT FOUND at {version_file_path} ---")
+
+# Apply to the build environment
+# We use escaped quotes so C++ treats it as a string literal "vX.X.X"
+full_version_str = f'\\"v{version}\\"'
+
+env.Append(CPPDEFINES=[
+    ("FW_VERSION", full_version_str)
+])