Normalize fullwidth punctuation to ASCII across codebase.

Add scripts/normalize_ambiguous_unicode.py; fix corrupted patch_instance_theme_templates.py. Preserves curly quotes in string literals; removes Git homoglyph warnings on .env.example.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/hub/hub_divergence_scan_lib.py

@@ -1,4 +1,4 @@
-"""行情区：Top20 内 MACD 背离扫描（档 A）+ 4h/日线/周线共振。"""
+"""行情区:Top20 内 MACD 背离扫描(档 A)+ 4h/日线/周线共振."""
 from __future__ import annotations
 
 import json
@@ -91,7 +91,7 @@ def detect_latest_macd_divergence(
     align_bars: int = SWING_ALIGN_BARS,
     recency_bars: int = RECENCY_BARS,
 ) -> dict[str, Any]:
-    """档 A：最近一对摆动 MACD 顶/底背离（与 chart.js detectDivergences 同类）。"""
+    """档 A:最近一对摆动 MACD 顶/底背离(与 chart.js detectDivergences 同类)."""
     if len(closes) < swing_lookback * 2 + 10:
         return {"direction": None}
     macd = build_macd_by_index(closes)
@@ -417,7 +417,7 @@ def scan_top_symbols(
     rank_items: Sequence[Mapping[str, Any]],
     fetch_bars: Callable[[str, str], Sequence[Mapping[str, Any]]],
 ) -> list[dict[str, Any]]:
-    """对 Top N 币种扫描三周期背离。fetch_bars(symbol, timeframe) -> OHLCV rows。"""
+    """对 Top N 币种扫描三周期背离.fetch_bars(symbol, timeframe) -> OHLCV rows."""
     out: list[dict[str, Any]] = []
     for row in rank_items:
         symbol = str(row.get("symbol") or "").strip().upper()