feat(theme): 语义令牌基础设施（令牌表+token/fillTokens API，规范§1）

src/app/Theme.cpp

@@ -28,6 +28,63 @@ public:
     }
 };
 
+// ── 语义令牌表（全 UI 唯一颜色来源）。改色只改这一处。 ──────────────────
+// 取值来源：规范 §1.5 语义映射 + 附录 A 速查 + §1.3 画布专用色。
+// 画布(canvas/*)与 bg/canvas 两模式同值——规范 §0.5「视图区永远深色」。
+struct Token { const char* name; const char* light; const char* dark; };
+const Token kTokens[] = {
+    // 背景
+    {"bg/app",            "#F7F8FA", "#0E1116"},
+    {"bg/panel",          "#FFFFFF", "#161A20"},
+    {"bg/panel-subtle",   "#FCFCFD", "#161B22"},
+    {"bg/header",         "#FFFFFF", "#12161C"},
+    {"bg/hover",          "#EFF1F4", "#1B2129"},
+    {"bg/selected",       "#EFF5FF", "#16243F"},
+    {"bg/canvas",         "#0B1320", "#0B1320"},
+    // 边框
+    {"border/default",    "#E3E6EB", "#262C35"},
+    {"border/strong",     "#CDD2DA", "#333B45"},
+    {"border/focus",      "#3B73EC", "#5E8DF5"},
+    // 文字
+    {"text/primary",      "#272C35", "#E6E9EF"},
+    {"text/secondary",    "#5A626F", "#A4ADBB"},
+    {"text/tertiary",     "#7C8493", "#7A8494"},
+    {"text/disabled",     "#A8AFBC", "#5A626F"},
+    {"text/link",         "#3B73EC", "#5E8DF5"},
+    {"text/on-primary",   "#FFFFFF", "#FFFFFF"},
+    // 强调
+    {"accent/primary",        "#3B73EC", "#5E8DF5"},
+    {"accent/primary-hover",  "#2B5FD9", "#93B4FA"},
+    {"accent/primary-pressed","#2450B8", "#3B73EC"},
+    // 其他
+    {"divider",               "#E3E6EB", "#22272F"},
+    {"scrollbar/thumb",       "#CDD2DA", "#3A424D"},
+    {"scrollbar/thumb-hover", "#A8AFBC", "#4A535F"},
+    // 状态色（主色 + 浅底）规范 §1.4
+    {"status/danger",     "#E5484D", "#FF6166"},
+    {"status/danger-bg",  "#FDECEC", "#3A1D1F"},
+    {"status/warning",    "#E08A1E", "#F5A623"},
+    {"status/warning-bg", "#FBF0DD", "#3A2C12"},
+    {"status/success",    "#2E9E5B", "#46C07A"},
+    {"status/success-bg", "#E7F6ED", "#16301F"},
+    {"status/info",       "#3B73EC", "#5E8DF5"},
+    {"status/info-bg",    "#EFF5FF", "#16243F"},
+    {"status/neutral",    "#7C8493", "#8A93A3"},
+    // 画布专用（两模式同值）规范 §1.3
+    {"canvas/bg",         "#0B1320", "#0B1320"},
+    {"canvas/bg-soft",    "#111B2D", "#111B2D"},
+    {"canvas/grid",       "#1E2A3D", "#1E2A3D"},
+    {"canvas/text",       "#E6ECF5", "#E6ECF5"},
+    {"canvas/text-dim",   "#8A97AC", "#8A97AC"},
+};
+
+QString tokenHex(const char* name, bool dark)
+{
+    for (const auto& t : kTokens)
+        if (qstrcmp(t.name, name) == 0) return QString::fromLatin1(dark ? t.dark : t.light);
+    return QStringLiteral("#FF00FF");  // 漏配的令牌显眼品红，便于一眼发现
+}
+
 // 全局样式表（浅色专业）。只描述外观，不含任何交互逻辑。
 // 注意：刻意不重写 QCheckBox::indicator —— Fusion 一旦检测到 indicator 子控件被改写，
 //       就需要自带勾选 image，否则勾选态会变成空白方块。这里交给 Fusion 原生绘制，
@@ -625,4 +682,26 @@ void applyThemedStyleSheet(QWidget* w, const QString& designQss)
                      [w, designQss]() { w->setStyleSheet(themedQss(designQss, isDarkTheme())); });
 }
 
+QString token(const char* name) { return tokenHex(name, isDarkTheme()); }
+
+QColor tokenColor(const char* name) { return QColor(token(name)); }
+
+QString fillTokens(const QString& tmpl)
+{
+    const bool dark = isDarkTheme();
+    QString s = tmpl;
+    for (const auto& t : kTokens)
+        s.replace(QStringLiteral("{{%1}}").arg(QLatin1String(t.name)),
+                  QString::fromLatin1(dark ? t.dark : t.light));
+    return s;
+}
+
+void applyTokenizedStyleSheet(QWidget* w, const QString& tmpl)
+{
+    if (!w) return;
+    w->setStyleSheet(fillTokens(tmpl));
+    QObject::connect(&ThemeManager::instance(), &ThemeManager::changed, w,
+                     [w, tmpl]() { w->setStyleSheet(fillTokens(tmpl)); });
+}
+
 }  // namespace geopro::app

src/app/Theme.hpp

@@ -9,6 +9,7 @@
 //   文字    #1F2A3D   次要文字 #5A6B85   边框     #D5DBE5   强边框 #C2CCDA
 //   危险    #C0392B
 
+#include <QColor>
 #include <QObject>
 #include <QString>
 
@@ -136,4 +137,15 @@ void applyThemedStyleSheet(QWidget* w, const QString& designQss);
 // 如 ADS dockManager 在其自带样式后追加规则）。不自动随主题切换，调用方需自行在切换时重取。
 QString themed(const QString& designQss);
 
+// ── 语义令牌（单一事实来源，取值见 Theme.cpp kTokens；规范 §1.5 + 附录 A + §1.3）──
+// 组件只引语义 token，禁止散落硬编码 hex。token 名形如 "bg/panel"、"accent/primary"。
+QString token(const char* name);       // 当前明暗下的 hex（未知名返回品红 "#FF00FF" 以便一眼发现漏配）
+QColor  tokenColor(const char* name);  // 同上，QColor 形式
+
+// 把 QSS 模板里的 {{token}} 占位替换为当前明暗的 hex 后返回。
+QString fillTokens(const QString& tmpl);
+
+// 应用一段 {{token}} 模板 QSS 到 widget，并随主题切换自动重填。
+void applyTokenizedStyleSheet(QWidget* w, const QString& tmpl);
+
 }  // namespace geopro::app