Add EUR/USD pair constants and EurUsdStrategyConfig

- EURUSD in PAIR_INFO; new per-pair price_precision and default_spread
  fields on both pairs (backtester consumes default_spread when --spread
  is omitted)
- EurUsdStrategyConfig ported from feature/eurusd-support plus EUR-local
  cost knobs (round_trip_cost=1 pip, min_tp_cost_multiple=10,
  min_sl_pips=8) so SignalConfig's gold-dollar values never apply to EUR;
  donor-tuned values are a pre-realism baseline pending re-tune
- PlatformConfig.eur_strategy field; track EUR in news currencies

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

config.py

@@ -37,9 +37,16 @@ class MarketSession(Enum):
 
 # ── Supported pairs ──────────────────────────────────────────────
 XAUUSD = "XAU/USD"
+EURUSD = "EUR/USD"
 
+# price_precision: decimals for SL/TP rounding and display.
+# default_spread: round-trip cost per trade in price units, charged by
+# the backtester when --spread is not given.
 PAIR_INFO = {
-    XAUUSD: {"display": "XAU/USD", "pip_value": 0.10, "is_jpy_pair": False},
+    XAUUSD: {"display": "XAU/USD", "pip_value": 0.10, "is_jpy_pair": False,
+             "price_precision": 2, "default_spread": 0.30},
+    EURUSD: {"display": "EUR/USD", "pip_value": 0.0001, "is_jpy_pair": False,
+             "price_precision": 5, "default_spread": 0.0001},
 }
 
 
@@ -158,7 +165,7 @@ class SignalConfig:
 @dataclass
 class NewsConfig:
     """Economic calendar & sentiment."""
-    tracked_currencies: List[str] = field(default_factory=lambda: ["USD", "XAU"])
+    tracked_currencies: List[str] = field(default_factory=lambda: ["USD", "XAU", "EUR"])
     pre_event_buffer_minutes: int = 30
     post_event_buffer_minutes: int = 15
     # Wider stay-out window after a high-impact release that surprised
@@ -252,6 +259,54 @@ class XauStrategyConfig:
     m5_pullback_touch_bars: int = 3
 
 
+@dataclass
+class EurUsdStrategyConfig:
+    """EUR/USD strategy config — separate from XAU for independent tuning.
+
+    Values ported from feature/eurusd-support are a pre-realism baseline
+    (tuned before spread charging and next-open fills) and are re-tuned
+    against the realistic backtester. Cost knobs (round_trip_cost,
+    min_tp_cost_multiple, min_sl_pips) are EUR-local so nothing
+    gold-calibrated from SignalConfig leaks into the EUR path.
+    """
+    enabled: bool = True
+    blocked_hours_utc: List[int] = field(default_factory=lambda: [22, 23, 0, 1, 2, 3])
+    weekend_filter: bool = True
+    allowed_weekdays: List[int] = field(default_factory=lambda: [0, 1, 2, 3, 4])
+    min_atr_threshold: float = 0.0003
+    sl_atr_multiplier: float = 1.5     # swing-buffer ATR multiple for SL placement
+    tp_atr_multiplier: float = 1.2
+
+    sl_atr_floor: float = 1.2
+    min_rr_ratio: float = 1.0
+    mature_move_threshold: float = 35.0
+    tp_quality_scale: Dict[str, float] = field(default_factory=lambda: {
+        "A+": 1.0, "A": 1.0, "B": 1.0, "C": 1.0,
+    })
+    blocked_regimes: List[str] = field(default_factory=lambda: ["ranging", "transitioning"])
+    min_quality_grades: List[str] = field(default_factory=lambda: ["A+", "A", "B"])
+    max_exhaustion_tags: int = 99
+    block_near_ema200: bool = False
+    session_hours: List[int] = field(default_factory=list)
+    min_entry_score: float = 38.0
+    min_entry_confidence: float = 60.0
+    block_rsi_extended: bool = True
+    blocked_vol_regimes: List[str] = field(default_factory=list)
+    min_indicator_agreement: int = 0
+    be_trigger_r: float = 0.3
+    be_buffer_r: float = 0.15
+
+    # ── EUR-local trade-cost knobs (replace SignalConfig's gold-dollar
+    # values in the EUR path) ─────────────────────────────────────────
+    # Round-trip cost per trade in price units (1.0 pip).
+    round_trip_cost: float = 0.0001
+    # Reject setups whose TP1 distance < round_trip_cost × this multiple
+    # (10 → 10-pip minimum target; EUR M5 ATR runs ~5-8 pips).
+    min_tp_cost_multiple: float = 10.0
+    # Minimum SL distance in pips.
+    min_sl_pips: float = 8.0
+
+
 @dataclass
 class FilterConfig:
     """Regime and session filters for live signals."""
@@ -275,6 +330,7 @@ class PlatformConfig:
     news: NewsConfig = field(default_factory=NewsConfig)
     backtest: FilterConfig = field(default_factory=FilterConfig)
     xau_strategy: XauStrategyConfig = field(default_factory=XauStrategyConfig)
+    eur_strategy: EurUsdStrategyConfig = field(default_factory=EurUsdStrategyConfig)
 
     symbol: str = XAUUSD
     display_name: str = "XAU/USD"