feat: 修复 H5 底部导航覆盖 + 更新项目进度文档

## H5 底部导航修复 (Bug #10) - 精简 App.vue，移除重复 tabbar，仅保留全局样式 - uni-page 设置 height: calc(100% - 50px) + overflow-y: auto - 内容区域精确停在底部导航上方，独立滚动不再叠加 - 恢复 custom-tab-bar 组件 ## 项目进度文档 - PROGRESS.md 更新至 10 个 Bug 修复 - 新增 H5 底部导航修复记录 - 新增历史变更条目
2026-05-12 20:24:42 +08:00
parent 69e164dcae
commit 7b62c2f8b4
125 changed files with 19725 additions and 728 deletions
@@ -0,0 +1,122 @@
+from typing import Dict, Optional
+from datetime import datetime
+from app.config import settings
+from app.core.redis import get_redis
+import httpx
+import json
+import logging
+
+logger = logging.getLogger(__name__)
+
+FALLBACK_RATES: Dict[str, Dict[str, float]] = {
+    "USD": {"CNY": 7.24, "EUR": 0.92, "GBP": 0.79, "JPY": 151.50, "KRW": 1320.00, "AUD": 1.52, "CAD": 1.37, "INR": 83.50, "BRL": 5.10, "RUB": 92.00},
+    "CNY": {"USD": 0.138, "EUR": 0.127, "GBP": 0.109, "JPY": 20.93, "KRW": 182.32, "AUD": 0.21, "CAD": 0.19},
+    "EUR": {"USD": 1.09, "CNY": 7.85, "GBP": 0.86, "JPY": 164.50, "KRW": 1435.00},
+    "GBP": {"USD": 1.27, "CNY": 9.15, "EUR": 1.16, "JPY": 192.00},
+}
+
+CACHE_TTL = 21600
+
+
+class ExchangeRateService:
+    def __init__(self):
+        self._rates_cache: Optional[Dict] = None
+        self._cache_time: Optional[datetime] = None
+
+    async def get_rate(self, from_currency: str, to_currency: str) -> Optional[float]:
+        from_currency = from_currency.upper()
+        to_currency = to_currency.upper()
+        if from_currency == to_currency:
+            return 1.0
+
+        rates = await self._get_all_rates(from_currency)
+        if rates and to_currency in rates:
+            return rates[to_currency]
+
+        base_rates = FALLBACK_RATES.get(from_currency, {})
+        return base_rates.get(to_currency)
+
+    async def convert(self, from_currency: str, to_currency: str, amount: float = 1.0) -> Optional[float]:
+        rate = await self.get_rate(from_currency, to_currency)
+        if rate is None:
+            return None
+        return round(amount * rate, 2)
+
+    async def get_all_rates(self, base: str = "USD") -> Dict[str, float]:
+        base = base.upper()
+        rates = await self._get_all_rates(base)
+        if rates:
+            return rates
+        return FALLBACK_RATES.get(base, {})
+
+    async def _get_all_rates(self, base: str) -> Optional[Dict[str, float]]:
+        cached = await self._get_from_cache(base)
+        if cached:
+            return cached
+
+        rates = None
+        for fetcher in [self._fetch_from_frankfurter, self._fetch_from_exchangerate_api]:
+            try:
+                rates = await fetcher(base)
+                if rates:
+                    break
+            except Exception as e:
+                logger.warning(f"Exchange rate fetcher failed: {e}")
+
+        if rates:
+            await self._set_cache(base, rates)
+
+        return rates
+
+    async def _fetch_from_frankfurter(self, base: str) -> Optional[Dict[str, float]]:
+        supported = ["USD", "EUR", "GBP", "CNY", "JPY", "KRW", "AUD", "CAD", "INR", "BRL"]
+        if base not in supported:
+            return None
+
+        try:
+            async with httpx.AsyncClient() as client:
+                resp = await client.get(
+                    f"https://api.frankfurter.app/latest",
+                    params={"from": base, "to": ",".join(supported)},
+                    timeout=10,
+                )
+                if resp.status_code == 200:
+                    data = resp.json()
+                    return data.get("rates")
+        except Exception as e:
+            logger.warning(f"Frankfurter API failed: {e}")
+        return None
+
+    async def _fetch_from_exchangerate_api(self, base: str) -> Optional[Dict[str, float]]:
+        if not settings.EXCHANGE_RATE_API_KEY:
+            return None
+        try:
+            async with httpx.AsyncClient() as client:
+                resp = await client.get(
+                    f"https://v6.exchangerate-api.com/v6/{settings.EXCHANGE_RATE_API_KEY}/latest/{base}",
+                    timeout=10,
+                )
+                if resp.status_code == 200:
+                    data = resp.json()
+                    if data.get("result") == "success":
+                        return data.get("conversion_rates")
+        except Exception as e:
+            logger.warning(f"ExchangeRate-API failed: {e}")
+        return None
+
+    async def _get_from_cache(self, base: str) -> Optional[Dict[str, float]]:
+        try:
+            r = await get_redis()
+            data = await r.get(f"exchange_rate:{base}")
+            if data:
+                return json.loads(data)
+        except Exception as e:
+            logger.debug(f"Redis cache miss for {base}: {e}")
+        return None
+
+    async def _set_cache(self, base: str, rates: Dict[str, float]):
+        try:
+            r = await get_redis()
+            await r.setex(f"exchange_rate:{base}", CACHE_TTL, json.dumps(rates))
+        except Exception as e:
+            logger.debug(f"Redis cache set failed for {base}: {e}")