Add separate requirements file for dev dependencies

.dockerignore

@@ -61,6 +61,9 @@ main.py
 ui/
 requirements.txt
 
+# Dev-specific files
+requirements-dev.txt
+
 # OS generated files
 .DS_Store
 .DS_Store?
@@ -68,4 +71,4 @@ requirements.txt
 .Spotlight-V100
 .Trashes
 ehthumbs.db
-Thumbs.db
+Thumbs.db

README.md

@@ -224,6 +224,13 @@ python web_server.py
 # Open http://localhost:8008
 ```
 
+For local development and tests:
+
+```bash
+pip install -r requirements-dev.txt
+pytest
+```
+
 ---
 
 ## Setup Guide

requirements-dev.txt

@@ -0,0 +1,7 @@
+# SoulSync development requirements
+# Runtime web dependencies + test runner
+
+-r requirements-webui.txt
+
+# Test runner
+pytest>=9.0.0