feat(website): add feature config types, chronos states and dive content config

Author: Aparencia

website/lib/features/chronos.ts

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+// @ai-context
+// Chronos 六态形态定义与视觉参数：类型、展示元数据、Canvas 演示渲染参数。
+// Chronos six-state definitions and visual params for the web demo.
+// Why: 状态机与展示数据集中定义，ChronosDemo 组件与 dive 内容配置共享同一来源，避免漂移。
+
+export type ChronosState =
+  | "asleep"
+  | "breathing"
+  | "focus"
+  | "short_break"
+  | "long_break"
+  | "milestone";
+
+export interface ChronosStateMeta {
+  key: ChronosState;
+  name: string;
+  icon: string;
+  desc: string;
+}
+
+export const CHRONOS_STATES: ChronosStateMeta[] = [
+  { key: "asleep", name: "沉睡", icon: "🌑", desc: "暗红余烬脉动，等待被唤醒。" },
+  { key: "breathing", name: "呼吸", icon: "🌕", desc: "60bpm 心跳红光，准备好开始。" },
+  { key: "focus", name: "专注", icon: "🔥", desc: "白炽星体，粒子随倒计时消散。" },
+  { key: "short_break", name: "短休", icon: "🌱", desc: "嫩绿种子自旋，萌芽新生。" },
+  { key: "long_break", name: "长休", icon: "🌳", desc: "种子破土，长成参天大树。" },
+  { key: "milestone", name: "划时代点", icon: "💡", desc: "把时间抽象，变成有生命的伙伴。" },
+];
+
+/** 六态渲染参数：RGB 主色 / 心跳强度(0-1) / 粒子规模 / 漂移速度 / 光晕强度 / 是否粒子消散 */
+export interface ChronosStateStyle {
+  color: [number, number, number];
+  pulse: number;
+  scale: number;
+  drift: number;
+  glow: number;
+  dissipate: boolean;
+}
+
+export const STATE_STYLE: Record<ChronosState, ChronosStateStyle> = {
+  asleep:      { color: [156, 59, 59],  pulse: 0.35, scale: 0.55, drift: 0.25, glow: 0.22, dissipate: false },
+  breathing:   { color: [239, 68, 68],  pulse: 1.0,  scale: 1.0,  drift: 0.4,  glow: 0.4,  dissipate: false },
+  focus:       { color: [249, 115, 22], pulse: 0.2,  scale: 1.2,  drift: 0.7,  glow: 0.55, dissipate: true },
+  short_break: { color: [74, 222, 128], pulse: 0.55, scale: 0.9,  drift: 0.55, glow: 0.45, dissipate: false },
+  long_break:  { color: [34, 197, 94],  pulse: 0.3,  scale: 1.1,  drift: 0.35, glow: 0.5,  dissipate: false },
+  milestone:   { color: [251, 191, 36], pulse: 0.9,  scale: 1.15, drift: 0.6,  glow: 0.6,  dissipate: false },
+};

website/lib/features/dive.ts

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+// @ai-context
+// 深潜功能页内容配置：数据驱动渲染，新增功能页时复制本文件结构。
+// Dive feature page content config.
+import type { FeatureConfig } from "./types";
+import { CHRONOS_STATES } from "./chronos";
+
+export const DIVE_CONFIG: FeatureConfig = {
+  slug: "dive",
+  name: "深潜",
+  origin: "番茄钟",
+  tagline: "把番茄钟，养成一只时间生物",
+  hero: {
+    title: "把番茄钟，养成一只时间生物",
+    subtitle: "它不是倒计时，是你亲手点亮、看着它燃烧与生长的 Chronos。",
+  },
+  mechanics: {
+    title: "它的一生，由你点亮",
+    hint: "点击形态，中央的 Chronos 会变成它",
+    items: CHRONOS_STATES.map((s) => ({ name: s.name, icon: s.icon, desc: s.desc })),
+  },
+  scenes: {
+    title: "不是 25 分钟，是你的节奏",
+    items: [
+      { name: "刷题", rhythm: "50 / 10", story: "沉浸演算，别让铃声打断思路。" },
+      { name: "背单词", rhythm: "15 / 3", story: "短频快，趁记忆窗口最亮时反复。" },
+      { name: "晚自习", rhythm: "90 / 20", story: "长线作战，跟着超昼夜节律走。" },
+    ],
+  },
+  outcome: {
+    title: "你的深潜，会积成一片海",
+    desc: "每一次专注都是一段下潜深度——它们被记录、被看见、长成只属于你的认知星图。",
+  },
+  science: {
+    title: "为什么「一个番茄」不够",
+    points: [
+      "注意力遵循 90–120 分钟的超昼夜节律，固定 25 分钟会截断你的高效期。",
+      "休息不是浪费——清醒期记忆重放，让刚学的内容在后台沉淀。",
+      "失败不被惩罚：连续受挫时屏幕注入柔粉，而非刺眼的红色。",
+    ],
+  },
+  cta: { text: "免费下载 · 现在就能养一只" },
+};

website/lib/features/types.ts

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+// @ai-context
+// 功能页内容配置类型：所有功能页共享同一结构，新增功能仅需实现该接口。
+// Feature config types: shared schema for all feature landing pages.
+// 纯类型文件，无运行时逻辑，不需要 "use client" 指令。
+
+export interface FeatureMechanicsItem {
+  name: string;
+  icon: string;
+  desc: string;
+}
+
+export interface FeatureSceneItem {
+  name: string;
+  rhythm: string;
+  story: string;
+}
+
+export interface FeatureConfig {
+  slug: string;
+  name: string;
+  origin: string;
+  tagline: string;
+  hero: { title: string; subtitle: string };
+  mechanics: { title: string; hint?: string; items: FeatureMechanicsItem[] };
+  scenes: { title: string; items: FeatureSceneItem[] };
+  outcome: { title: string; desc: string };
+  science: { title: string; points: string[] };
+  cta: { text: string };
+}