fix: audit fixes across all install/update scripts

- codex/ucodex_update.sh: fix ${NC} → ${RESET} (crashed with set -u), fix CRLF
- gemini/ugemini_install.sh: read API_KEY/BASE_URL from config instead of hardcoded, fix "source ~/.bashrc" → "source /etc/profile.d/gemini-cli.sh"
- qwen/uqwen_install.sh: read API_KEY/BASE_URL from config instead of hardcoded

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

gemini/ugemini_install.sh

@@ -193,8 +193,8 @@ fi
 # ---- Set environment variables (system-wide, all users) ----
 
 info "Setting environment variables..."
-API_KEY="ClauderAPI"
-BASE_URL="https://ai.37-187-136-86.sslip.io"
+API_KEY=$(python3 -c "import json; print(json.load(open('$INSTALL_DIR/gemini_config.json'))['api_key'])")
+BASE_URL=$(python3 -c "import json; print(json.load(open('$INSTALL_DIR/gemini_config.json'))['base_url'])")
 
 # Write to /etc/environment (all users, all sessions including cron)
 ETC_ENV="/etc/environment"
@@ -238,13 +238,13 @@ if echo "$RESULT" | grep -qi "OK"; then
     echo "    gemini-2.5-pro, gemini-2.5-flash"
     echo "    gemini-3-flash, gemini-3.1-pro"
     echo ""
-    echo "  If env vars not active, run: source ~/.bashrc"
+    echo "  If env vars not active, run: source /etc/profile.d/gemini-cli.sh"
     echo ""
 else
     warn "Patches applied but test prompt failed."
     echo "  Response: $RESULT"
     echo ""
     echo "  Try manually:"
-    echo "    source ~/.bashrc"
+    echo "    source /etc/profile.d/gemini-cli.sh"
     echo "    gemini -p 'Hello'"
 fi