v1.1.3: 重制应用图标 — 矢量 SVG 渲染

【图标焕新】
- SVG 矢量源文件：纯几何路径绘制，任意尺寸不失真
- 紫罗兰渐变圆角矩形底 + 几何 C 字形（不用字体，渲染一致）
- 金色 </> 角括号 + 下划线点缀（C/C++ 代码元素）
- Qt QSvgRenderer 渲染 16~256px PNG + ICO
- 带阴影和边框高光，精致专业

resources/voiletcstudio.svg

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" width="256" height="256">
+  <defs>
+    <!-- Background gradient -->
+    <linearGradient id="bgGrad" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0%" stop-color="#8E24AA"/>
+      <stop offset="100%" stop-color="#4A148C"/>
+    </linearGradient>
+    <!-- Inner glow -->
+    <radialGradient id="innerGlow" cx="0.5" cy="0.4" r="0.5">
+      <stop offset="0%" stop-color="#AB47BC" stop-opacity="0.5"/>
+      <stop offset="100%" stop-color="#4A148C" stop-opacity="0"/>
+    </radialGradient>
+  </defs>
+
+  <!-- Shadow -->
+  <rect x="8" y="10" width="240" height="240" rx="40" ry="40" fill="#00000033"/>
+
+  <!-- Background rounded rectangle -->
+  <rect x="4" y="4" width="248" height="248" rx="38" ry="38" fill="url(#bgGrad)"/>
+
+  <!-- Inner glow overlay -->
+  <rect x="4" y="4" width="248" height="248" rx="38" ry="38" fill="url(#innerGlow)"/>
+
+  <!-- Subtle border highlight -->
+  <rect x="6" y="6" width="244" height="244" rx="36" ry="36" fill="none" stroke="#CE93D8" stroke-width="1.5" stroke-opacity="0.4"/>
+
+  <!-- ===== C Letter (geometric path, no text dependency) ===== -->
+  <!-- Modern bold C: outer arc + inner arc as a path -->
+  <g transform="translate(128, 128)" fill="#FFFFFF">
+    <!-- Large C - drawn as a thick partial circle -->
+    <path d="
+      M -40,-60
+      A 70,70 0 0,1 50,-40
+      L 30,-15
+      A 45,45 0 0,0 -20,-40
+      L -20,40
+      A 45,45 0 0,0 30,15
+      L 50,40
+      A 70,70 0 0,1 -40,60
+      Z
+    " fill-rule="nonzero"/>
+  </g>
+
+  <!-- ===== Small angle brackets (code element) ===== -->
+  <g fill="#FFD54F" opacity="0.9">
+    <!-- < bracket top-left -->
+    <path d="M 62,108 L 78,98 L 78,106 L 68,118 L 78,130 L 78,138 Z"/>
+    <!-- > bracket top-right -->
+    <path d="M 194,108 L 178,98 L 178,106 L 188,118 L 178,130 L 178,138 Z"/>
+  </g>
+
+  <!-- Small dots (syntax element) -->
+  <circle cx="128" cy="195" r="4" fill="#FFD54F" opacity="0.7"/>
+
+  <!-- "C" underscore accent -->
+  <line x1="102" y1="185" x2="154" y2="185" stroke="#FFD54F" stroke-width="3" stroke-linecap="round" opacity="0.6"/>
+</svg>