fix: frame alignment, ee-prefix for lite mode, qrencode in deps

- All frame boxes: correct 54-char width with emoji compensation
- Lite mode links now include ee-prefix + mask_host hex (fake-TLS)
- Added qrencode to ensure_deps() so QR codes work after fresh install
- Centralized link generation in generate_proxy_link()
- Fixed bot.py get_proxy_link() for lite mode ee-prefix

lib/common.sh

@@ -225,7 +225,7 @@ install_pkg() {
 
 ensure_deps() {
     local missing=()
-    for cmd in curl jq openssl git; do
+    for cmd in curl jq openssl git qrencode; do
         if ! command -v "$cmd" &>/dev/null; then
             missing+=("$cmd")
         fi