fix(install): implement atomic update to prevent binary corruption

- Use temporary files (*.new) during installation process
- Perform atomic 'mv -f' operation to replace binaries
- Prevent partial updates if process is interrupted/fails
- Fixes critical issue where failed update deleted existing app

bin/uninstall.sh

@@ -67,6 +67,8 @@ scan_applications() {
     local -a app_dirs=(
         "/Applications"
         "$HOME/Applications"
+        "/Library/Input Methods"
+        "$HOME/Library/Input Methods"
     )
     local vol_app_dir
     local nullglob_was_set=0

install.sh

@@ -493,8 +493,12 @@ install_files() {
             if needs_sudo; then
                 log_admin "Admin access required for /usr/local/bin"
             fi
-            maybe_sudo cp "$SOURCE_DIR/mole" "$INSTALL_DIR/mole"
-            maybe_sudo chmod +x "$INSTALL_DIR/mole"
+
+            # Atomic update: copy to temporary name first, then move
+            maybe_sudo cp "$SOURCE_DIR/mole" "$INSTALL_DIR/mole.new"
+            maybe_sudo chmod +x "$INSTALL_DIR/mole.new"
+            maybe_sudo mv -f "$INSTALL_DIR/mole.new" "$INSTALL_DIR/mole"
+
             log_success "Installed mole to $INSTALL_DIR"
         fi
     else
@@ -506,8 +510,9 @@ install_files() {
         if [[ "$source_dir_abs" == "$install_dir_abs" ]]; then
             log_success "mo alias already present"
         else
-            maybe_sudo cp "$SOURCE_DIR/mo" "$INSTALL_DIR/mo"
-            maybe_sudo chmod +x "$INSTALL_DIR/mo"
+            maybe_sudo cp "$SOURCE_DIR/mo" "$INSTALL_DIR/mo.new"
+            maybe_sudo chmod +x "$INSTALL_DIR/mo.new"
+            maybe_sudo mv -f "$INSTALL_DIR/mo.new" "$INSTALL_DIR/mo"
             log_success "Installed mo alias"
         fi
     fi