feat(design): 主色由墨松绿改为景泰蓝蓝系，Logo 与图标同步

纸白底改冷调与主色同轴；语义色 sage/wheat/rust 不变，sky 提亮与主色区分。Logo 三段线改浅蓝白、圆点改亮蓝；favicon/PWA 图标/安卓自适应图标/状态栏一并重绘，新增 tools/make-icons.py 作为唯一出处。

web/tailwind.config.js

@@ -6,42 +6,42 @@ export default {
       colors: {
         // 底色：暖白纸面，不用纯白，避免刺眼、也让卡片有层次
         paper: {
-          50: "#FCFCFA",
-          100: "#F7F7F3",
-          200: "#F0F0EA",
-          300: "#E6E6DE",
+          50: "#F9FAFC",
+          100: "#F3F5F9",
+          200: "#E9EDF3",
+          300: "#DFE5ED",
         },
-        // 分隔线与描边
+        // 分隔线与描边（冷灰，跟蓝主色同一个中性轴）
         line: {
-          100: "#ECECE6",
-          200: "#E1E1D9",
-          300: "#D2D2C8",
+          100: "#EDEFF3",
+          200: "#E2E6EC",
+          300: "#D3D9E1",
         },
         // 文字与中性
         ink: {
-          50: "#F6F8F7",
-          100: "#E9EDEB",
-          200: "#D7DDDA",
-          300: "#BAC3C0",
-          400: "#96A19D",
-          500: "#6D7874",
-          600: "#4E5956",
-          700: "#39443F",
-          800: "#252E2A",
-          900: "#161C1A",
+          50: "#F6F8FA",
+          100: "#E9EEF3",
+          200: "#D7DEE7",
+          300: "#B8C2CE",
+          400: "#929EAD",
+          500: "#6C7788",
+          600: "#4E5867",
+          700: "#3A4352",
+          800: "#262D39",
+          900: "#161C25",
         },
-        // 主色：墨松绿，克制、有"工作台"气质，避开任务工具常见的荧光蓝
+        // 主色：景泰蓝（沉一点的靛蓝），克制、有"工作台"气质，避开任务工具常见的荧光蓝
         primary: {
-          50: "#EFF5F3",
-          100: "#DBE9E4",
-          200: "#B7D2C9",
-          300: "#8CB6A9",
-          400: "#619688",
-          500: "#41796A",
-          600: "#2F6054",
-          700: "#264E44",
-          800: "#1E3E36",
-          900: "#172F29",
+          50: "#EFF5FB",
+          100: "#DCE9F7",
+          200: "#B9D3EC",
+          300: "#8FB6DD",
+          400: "#6094C8",
+          500: "#3E76AC",
+          600: "#2E5D8D",
+          700: "#274B73",
+          800: "#1F3B5B",
+          900: "#1A2F48",
         },
         // 强调色：陶土橙，只用在"需要人注意"的地方
         clay: {
@@ -59,7 +59,8 @@ export default {
         sage: { 500: "#2F7D5E", 50: "#EAF4EF" },
         wheat: { 500: "#A97C25", 50: "#F8F1E2" },
         rust: { 500: "#B04A32", 50: "#FAEDE9" },
-        sky: { 500: "#3E6F91", 50: "#EBF2F7" },
+        // 信息色：比主色更亮更青一档，免得和 primary 的「进行中」糊在一起
+        sky: { 500: "#2F86B0", 50: "#E8F4FA" },
       },
       fontFamily: {
         sans: [
@@ -93,8 +94,8 @@ export default {
         "3xl": "24px",
       },
       boxShadow: {
-        card: "0 1px 2px rgba(22,28,26,0.04), 0 8px 24px -16px rgba(22,28,26,0.35)",
-        pop: "0 2px 6px rgba(22,28,26,0.06), 0 20px 48px -24px rgba(22,28,26,0.35)",
+        card: "0 1px 2px rgba(20,27,36,0.04), 0 8px 24px -16px rgba(20,27,36,0.35)",
+        pop: "0 2px 6px rgba(20,27,36,0.06), 0 20px 48px -24px rgba(20,27,36,0.35)",
         inset: "inset 0 1px 0 rgba(255,255,255,0.6)",
       },
       keyframes: {