Crypto trading bot: engine, brokers, backtester, dashboard, deploy

FastAPI backend with a single-strategy async engine, paper and Binance
brokers, pure-python indicators, a backtester that shares the engine's
portfolio math, and a Vue dashboard with a live WebSocket feed. Adds the
Gitea Actions CI/CD workflow that deploys to Traefik via docker_default.

backend/tests/test_indicators.py

@@ -0,0 +1,40 @@
+from __future__ import annotations
+
+import pytest
+
+from app.engine.indicators import atr, ema, rolling_std, rsi, sma
+from app.schemas import Candle
+
+
+def candle(high: float, low: float, close: float, open_: float | None = None) -> Candle:
+    return Candle(
+        ts=0,
+        open=open_ if open_ is not None else close,
+        high=high,
+        low=low,
+        close=close,
+        volume=1,
+    )
+
+
+def test_sma() -> None:
+    assert sma([1, 2, 3, 4, 5], 3) == [None, None, 2.0, 3.0, 4.0]
+
+
+def test_ema() -> None:
+    assert ema([1, 2, 3, 4, 5], 3) == [None, None, 2.0, 3.0, 4.0]
+
+
+def test_rsi_monotonic_is_100() -> None:
+    values = [float(i) for i in range(1, 20)]
+    assert rsi(values, 14)[-1] == pytest.approx(100.0)
+
+
+def test_atr_flat_market_is_zero() -> None:
+    candles = [candle(100, 100, 100) for _ in range(20)]
+    assert atr(candles, 5)[-1] == pytest.approx(0.0)
+
+
+def test_rolling_std() -> None:
+    result = rolling_std([1, 1, 1, 1], 2)
+    assert result[-1] == pytest.approx(0.0)