install.sh: explicit build targets and auto-fix PATH

- Build g3 and studio explicitly with -p flags
- Detect shell and rc file (zsh/bash/fish)
- Auto-add PATH to rc file with user confirmation
- Handle case where PATH is in rc but not loaded

scripts/install.sh

@@ -9,7 +9,7 @@ INSTALL_DIR="$HOME/.local/bin"
 mkdir -p "$INSTALL_DIR"
 
 echo "Building g3 and studio (release)..."
-cargo build --release
+cargo build --release -p g3 -p studio
 
 echo "Installing to $INSTALL_DIR..."
 cp target/release/g3 "$INSTALL_DIR/"
@@ -34,10 +34,52 @@ echo "  $INSTALL_DIR/g3"
 echo "  $INSTALL_DIR/g3-studio"
 echo "  $INSTALL_DIR/studio -> g3-studio"
 
-# Check if ~/.local/bin is in PATH
+# Check if ~/.local/bin is in PATH and fix if needed
 if [[ ":$PATH:" != *":$INSTALL_DIR:"* ]]; then
     echo ""
     echo "⚠️  $INSTALL_DIR is not in your PATH"
-    echo "   Add this to your shell rc file:"
-    echo "   export PATH=\"\$HOME/.local/bin:\$PATH\""
+    
+    # Detect shell config file
+    SHELL_NAME=$(basename "$SHELL")
+    case "$SHELL_NAME" in
+        zsh)  RC_FILE="$HOME/.zshrc" ;;
+        bash) 
+            # macOS uses .bash_profile, Linux uses .bashrc
+            if [[ "$OSTYPE" == "darwin"* ]]; then
+                RC_FILE="$HOME/.bash_profile"
+            else
+                RC_FILE="$HOME/.bashrc"
+            fi
+            ;;
+        fish) RC_FILE="$HOME/.config/fish/config.fish" ;;
+        *)    RC_FILE="" ;;
+    esac
+    
+    if [ -n "$RC_FILE" ]; then
+        # Check if it's already in the rc file (just not loaded in current session)
+        if grep -q '\.local/bin' "$RC_FILE" 2>/dev/null; then
+            echo "   (Already in $RC_FILE, just not loaded in this session)"
+            echo "   Run: source $RC_FILE"
+        else
+            echo ""
+            read -p "   Add to $RC_FILE? [Y/n] " -n 1 -r
+            echo
+            if [[ $REPLY =~ ^[Yy]$ ]] || [[ -z $REPLY ]]; then
+                echo '' >> "$RC_FILE"
+                if [[ "$SHELL_NAME" == "fish" ]]; then
+                    echo 'set -gx PATH $HOME/.local/bin $PATH' >> "$RC_FILE"
+                else
+                    echo 'export PATH="$HOME/.local/bin:$PATH"' >> "$RC_FILE"
+                fi
+                echo "   ✅ Added to $RC_FILE"
+                echo "   Run: source $RC_FILE"
+            else
+                echo "   Skipped. Add manually:"
+                echo "   export PATH=\"\$HOME/.local/bin:\$PATH\""
+            fi
+        fi
+    else
+        echo "   Unknown shell ($SHELL_NAME). Add this to your shell rc file:"
+        echo "   export PATH=\"\$HOME/.local/bin:\$PATH\""
+    fi
 fi