Fix direnv configuration to use root-level venv

Simplified .envrc to use the existing root venv (bin/ directory) instead of creating nested .venv
Updated .tinyrc to point to root directory
Ensures direnv properly activates the virtual environment with all installed packages

.envrc

@@ -1,28 +1,23 @@
-# Python Virtual Environment Auto-Activation Template
-# Copy this file as .envrc to any Python project directory
-# Default usage:
-# Then run: direnv allow
-VENV_PATH=$(python -c "import json; print(json.load(open('.tinyrc')).get('venv_path', '.venv'))")
-echo "Using virtual env in ${VENV_PATH}"
-export VENV_PATH
+# TinyTorch Virtual Environment Auto-Activation
+# This uses the root-level venv (bin/ directory)
 
-# Check if .venv exists, create if it doesn't
-if [[ ! -d "$VENV_PATH" ]]; then
-    echo "🔧 Creating Python virtual environment..."
-    python3 -m venv "$VENV_PATH"
-    echo "📦 Installing basic dependencies..."
-    source "$VENV_PATH/bin/activate"
-    pip install --upgrade pip
-    # Uncomment the next line if you have a requirements.txt
-    # pip install -r requirements.txt
+# The virtual environment is at the project root
+VENV_PATH="${PWD}"
+
+# Check if bin/activate exists
+if [[ ! -f "${VENV_PATH}/bin/activate" ]]; then
+    echo "❌ Virtual environment not found at ${VENV_PATH}"
+    echo "Run: python3 -m venv ${VENV_PATH}"
+    exit 1
 fi
 
 # Activate the virtual environment
-source "$VENV_PATH/bin/activate"
+source "${VENV_PATH}/bin/activate"
 
 # Set common Python environment variables
 export PYTHONPATH="${PWD}:${PYTHONPATH}"
 export PROJECT_ROOT="${PWD}"
+export VENV_PATH
 
 # Prevent Python from writing pyc files
 export PYTHONDONTWRITEBYTECODE=1

.tinyrc

@@ -1,3 +1,3 @@
 {
-  "venv_path": ".venv"
+  "venv_path": "."
 }