docs: add git submodule init step to setup instructions

Author: ericgriffin

README.md

@@ -134,6 +134,9 @@ Submersion is built on these principles:
 git clone https://github.com/submersion-app/submersion.git
 cd submersion
 
+# Initialize submodules (required for libdivecomputer)
+git submodule update --init --recursive
+
 # Install dependencies
 flutter pub get
 
@@ -292,9 +295,10 @@ See [FEATURE_ROADMAP.md](FEATURE_ROADMAP.md) for the complete development plan.
 Contributions are welcome! Submersion is built by divers, for divers.
 
 1. Fork the repository
-2. Create a feature branch: `git checkout -b feature/your-feature`
-3. Make your changes with tests
-4. Submit a pull request
+2. Clone and initialize submodules: `git clone --recurse-submodules <your-fork-url>`
+3. Create a feature branch: `git checkout -b feature/your-feature`
+4. Make your changes with tests
+5. Submit a pull request
 
 Please run `flutter analyze` and `flutter test` before submitting.
 

docs/README.md

@@ -82,6 +82,9 @@ Full support for UDDF, CSV, and PDF export. Import from other dive log apps. Com
 git clone https://github.com/submersion-app/submersion.git
 cd submersion
 
+# Initialize submodules (required for libdivecomputer)
+git submodule update --init --recursive
+
 # Install dependencies
 flutter pub get
 
@@ -97,6 +100,7 @@ flutter run -d macos
 # Clone and setup
 git clone https://github.com/submersion-app/submersion.git
 cd submersion
+git submodule update --init --recursive
 flutter pub get
 dart run build_runner build --delete-conflicting-outputs
 
@@ -112,6 +116,7 @@ flutter run -d ios
 # Clone and setup
 git clone https://github.com/submersion-app/submersion.git
 cd submersion
+git submodule update --init --recursive
 flutter pub get
 dart run build_runner build --delete-conflicting-outputs
 
@@ -124,6 +129,7 @@ flutter run -d android
 # Clone and setup
 git clone https://github.com/submersion-app/submersion.git
 cd submersion
+git submodule update --init --recursive
 flutter pub get
 dart run build_runner build --delete-conflicting-outputs
 
@@ -136,6 +142,7 @@ flutter run -d windows
 # Clone and setup
 git clone https://github.com/submersion-app/submersion.git
 cd submersion
+git submodule update --init --recursive
 flutter pub get
 dart run build_runner build --delete-conflicting-outputs