refactor(install): Add PATH check and skip setup in nested install

- Check if ~/.local/bin is on PATH after installation and warn users
- Skip setup commands when Linux install.sh is called from main installer
- Add Q_SKIP_SETUP environment variable to control setup execution

Author: kkashilk

bundle/linux/install.sh

@@ -140,14 +140,18 @@ if [ -n "${Q_INSTALL_GLOBAL:-}" ]; then
     install -m 755 "$SCRIPT_DIR/bin/qchat" /usr/local/bin/
     install -m 755 "$SCRIPT_DIR/bin/qterm" /usr/local/bin/
 
-    /usr/local/bin/q integrations install dotfiles
-    /usr/local/bin/q setup --global "$@"
+    if [ -z "${Q_SKIP_SETUP:-}" ]; then
+        /usr/local/bin/q integrations install dotfiles
+        /usr/local/bin/q setup --global "$@"
+    fi
 else
     mkdir -p "$HOME/.local/bin"
 
     install -m 755 "$SCRIPT_DIR/bin/q" "$HOME/.local/bin/"
     install -m 755 "$SCRIPT_DIR/bin/qchat" "$HOME/.local/bin/"
     install -m 755 "$SCRIPT_DIR/bin/qterm" "$HOME/.local/bin/"
 
-    "$HOME/.local/bin/q" setup "$@"
+    if [ -z "${Q_SKIP_SETUP:-}" ]; then
+        "$HOME/.local/bin/q" setup "$@"
+    fi
 fi

scripts/install.sh

@@ -383,7 +383,7 @@ install_linux() {
 
     log "Running installer..."
     chmod +x "$install_script"
-    "$install_script"
+    Q_SKIP_SETUP=1 "$install_script"
 }
 
 # Cleanup function - only removes files/dirs we created
@@ -465,10 +465,18 @@ main() {
     echo
     success "$CLI_NAME installation completed successfully!"
     echo
+
+    # Check if ~/.local/bin is on PATH
+    if [[ ":$PATH:" != *":$HOME/.local/bin:"* ]]; then
+        warning "$HOME/.local/bin is not on your PATH"
+        echo "Add it to your PATH by adding this line to your shell configuration file:"
+        echo "  export PATH=\"\$HOME/.local/bin:\$PATH\""
+        echo
+    fi
+
     echo "Next steps:"
     echo "1. Run: $COMMAND_NAME --help to get started"
     echo "2. Run: $COMMAND_NAME chat to start an interactive session"
-    echo "3. Run: $COMMAND_NAME integrations install --help to install terminal integrations"
     echo
 }