refactor(cursor): use lib shim helpers, remove duplicate logic

- Drop local REPO_*, SHARED_SHIM, SHIM_*, ensure_shim, refresh_shim_assets
- Call refresh_shim_assets in update_cursor, run_ensure_shim in install paths

Author: ZanzyTHEbar

cursor.sh

@@ -21,14 +21,6 @@ fi
 
 CLI_NAME="cursor-installer"
 CLI_BIN="$HOME/.local/bin/$CLI_NAME"
-REPO_OWNER=${REPO_OWNER:-watzon}
-REPO_BRANCH=${REPO_BRANCH:-main}
-REPO_NAME=${REPO_NAME:-cursor-linux-installer}
-BASE_RAW_URL="https://raw.githubusercontent.com/${REPO_OWNER}/${REPO_NAME}/${REPO_BRANCH}"
-SHARED_SHIM="$LIB_DIR/shim.sh"
-SHIM_URL="$BASE_RAW_URL/shim.sh"
-SHIM_HELPER="$LIB_DIR/ensure-shim.sh"
-SHIM_HELPER_URL="$BASE_RAW_URL/scripts/ensure-shim.sh"
 
 # Installation mode: 'appimage' (default) or 'extracted'
 # Can be set via CURSOR_INSTALL_MODE environment variable or --extract flag
@@ -48,44 +40,13 @@ function get_extracted_root() {
         fi
     done
     return 1
-} 
+}
 
 function get_extraction_dir() {
     # Prefer ~/.local/share/cursor for extracted installations
     echo "$HOME/.local/share/cursor"
 }
 
-function ensure_shim() {
-    if [ -x "$SHIM_HELPER" ]; then
-        if ! "$SHIM_HELPER"; then
-            log_warn "Shim update failed; continuing."
-        fi
-        return 0
-    fi
-    if [ -f "$SHIM_HELPER" ]; then
-        if ! sh "$SHIM_HELPER"; then
-            log_warn "Shim update failed; continuing."
-        fi
-        return 0
-    fi
-    log_info "Shim helper not found; skipping shim update."
-    return 0
-}
-
-function refresh_shim_assets() {
-    log_step "Refreshing cursor shim assets..."
-    mkdir -p "$LIB_DIR"
-    if ! curl -fsSL "$SHIM_URL" -o "$SHARED_SHIM"; then
-        log_warn "Failed to download shim.sh; continuing."
-        return 0
-    fi
-    if ! curl -fsSL "$SHIM_HELPER_URL" -o "$SHIM_HELPER"; then
-        log_warn "Failed to download ensure-shim.sh; continuing."
-        return 0
-    fi
-    chmod +x "$SHIM_HELPER" "$SHARED_SHIM" || true
-}
-
 function check_fuse() {
     # First, check if FUSE is already available
     if fusermount -V >/dev/null 2>&1; then
@@ -328,7 +289,7 @@ EOF
 }
 
 function install_cursor_extracted() {
-    ensure_shim
+    run_ensure_shim
     local install_dir="$1"
     local release_track=${2:-stable}
     local temp_file
@@ -478,7 +439,7 @@ function install_cursor_extracted() {
 }
 
 function install_cursor() {
-    ensure_shim
+    run_ensure_shim
     local install_dir="$1"
     local release_track=${2:-stable} # Default to stable if not specified