feat: Refactor settings UI and fix commission fee recording

Settings improvements:
- Reorganize config groups with logical ordering (server, auth, ai, trading, etc.)
- Add description/tooltip for each config item with question mark icon
- Add icon to each group header
- Support i18n for descriptions (zh-CN, zh-TW, en-US)
- Move order execution config (ORDER_MODE, MAKER_WAIT_SEC, MAKER_OFFSET_BPS) to env

Commission fee fixes:
- Fix fee extraction in exchange clients: Bybit, Coinbase, Kraken, Gate, Kucoin, Bitfinex
- Properly accumulate and record commission fees in pending_order_worker
- Add fee/fee_ccy fields to wait_for_fill returns

Frontend updates:
- Remove order_mode config from trading-assistant frontend (now uses env config)
- Add sorted schema display by order field
- Add tooltip with description on hover

quantdinger_vue/src/views/trading-assistant/index.vue

@@ -2570,8 +2570,7 @@ export default {
                 trade_direction: tradeDirection,
                 timeframe: values.timeframe,
                 market_type: marketType,
-                // Preset order params (advanced settings removed from UI)
-                order_mode: 'maker',
+                // Order execution settings moved to backend env config (ORDER_MODE, MAKER_WAIT_SEC, MAKER_OFFSET_BPS)
                 margin_mode: 'cross',
                 signal_mode: 'confirmed',
                 // Backtest-like configs