Hearthstone deck tracker for Linux, first public version

Reads the game's own Power.log: no screen capture, no image
recognition, no memory reading.

- deck tracking (remaining cards, draw chance, played cards fade in place)
- opponent panel (revealed cards, hand and deck counts)
- decks read from the game's offline cache, matched to the match
- card art in rows, full card on hover
- overlay and window modes, adjustable transparency, tray icon
- English and Turkish interface
- consistency tests over a real log corpus, cross-checked against Zone.log

ui/icon.py

@@ -0,0 +1,77 @@
+"""Uygulama ikonu.
+
+Önemli ayrıntı: ikonu QIcon.fromTheme ile kurarsak Qt, sistem tepsisine
+(StatusNotifierItem) ikonun kendisini değil *adını* gönderiyor. Plasma o adı
+kendi ikon önbelleğinden çözmeye çalışıyor ve yeni kurulmuş bir ikonu
+bulamayınca tepside boş kare çıkıyor.
+
+Bu yüzden ikon her zaman dosyadan kuruluyor ve önceden üretilmiş PNG'ler
+eklenerek gerçek piksel verisi taşınıyor. Böylece tepsi ikonu, tema önbelleği
+ne durumda olursa olsun görünüyor.
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+from PyQt6.QtCore import QRectF, QSize, Qt
+from PyQt6.QtGui import QColor, QIcon, QPainter, QPixmap
+
+from . import theme
+
+ASSETS = Path(__file__).resolve().parent.parent / "assets"
+SVG_PATH = ASSETS / "deste.svg"
+PNG_DIR = ASSETS / "icons"
+PNG_SIZES = (16, 22, 24, 32, 48, 64, 96, 128, 256)
+
+_cached: QIcon | None = None
+
+
+def _fallback_pixmap(size: int) -> QPixmap:
+    pixmap = QPixmap(size, size)
+    pixmap.fill(QColor(0, 0, 0, 0))
+    scale = size / 64.0
+    painter = QPainter(pixmap)
+    painter.setRenderHint(QPainter.RenderHint.Antialiasing)
+    painter.scale(scale, scale)
+    painter.setPen(Qt.PenStyle.NoPen)
+    painter.setBrush(QColor(theme.BACKGROUND))
+    painter.drawRoundedRect(QRectF(2, 2, 60, 60), 13, 13)
+    painter.setBrush(QColor(theme.MANA_BLUE))
+    painter.drawRoundedRect(QRectF(16, 14, 24, 34), 4, 4)
+    painter.setBrush(QColor(theme.ACCENT))
+    painter.drawRoundedRect(QRectF(25, 13, 25, 36), 4, 4)
+    painter.end()
+    return pixmap
+
+
+def app_icon() -> QIcon:
+    global _cached
+    if _cached is not None:
+        return _cached
+
+    icon = QIcon()
+    added = False
+
+    for size in PNG_SIZES:
+        png = PNG_DIR / f"deste-{size}.png"
+        if png.exists():
+            pixmap = QPixmap(str(png))
+            if not pixmap.isNull():
+                icon.addPixmap(pixmap)
+                added = True
+
+    if not added and SVG_PATH.exists():
+        source = QIcon(str(SVG_PATH))
+        for size in PNG_SIZES:
+            pixmap = source.pixmap(QSize(size, size))
+            if not pixmap.isNull():
+                icon.addPixmap(pixmap)
+                added = True
+
+    if not added:
+        for size in PNG_SIZES:
+            icon.addPixmap(_fallback_pixmap(size))
+
+    _cached = icon
+    return _cached