diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index 85b0aaf..a69652c 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -1589,6 +1589,12 @@ dependencies = [
  "unicode-segmentation",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+
 [[package]]
 name = "libappindicator"
 version = "0.9.0"
@@ -3149,6 +3155,15 @@ dependencies = [
  "new_debug_unreachable",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06794f8f6c5c898b3275aebefa6b8a1cb24cd2c6c79397ab15774837a0bc5755"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.69"
@@ -3483,6 +3498,29 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
+[[package]]
+name = "ts-rs"
+version = "10.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e640d9b0964e9d39df633548591090ab92f7a4567bc31d3891af23471a3365c6"
+dependencies = [
+ "lazy_static",
+ "thiserror 2.0.18",
+ "ts-rs-macros",
+]
+
+[[package]]
+name = "ts-rs-macros"
+version = "10.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e9d8656589772eeec2cf7a8264d9cda40fb28b9bc53118ceb9e8c07f8f38730"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.118",
+ "termcolor",
+]
+
 [[package]]
 name = "typeid"
 version = "1.0.3"
@@ -3503,6 +3541,7 @@ dependencies = [
  "serde_json",
  "tauri",
  "tauri-build",
+ "ts-rs",
 ]
 
 [[package]]
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index e204c1d..a768061 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -17,3 +17,8 @@ tauri-build = { version = "2", features = [] }
 tauri = { version = "2", features = [] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+ts-rs = { version = "10", features = ["no-serde-warnings"] }
+
+[features]
+# 默认不导出类型（避免 CI 构建 fail）
+default = []
diff --git a/src-tauri/bindings/types.ts b/src-tauri/bindings/types.ts
new file mode 100644
index 0000000..186d78f
--- /dev/null
+++ b/src-tauri/bindings/types.ts
@@ -0,0 +1,33 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+export type AiCfg = { preset: string, protocol: string, base: string, key: string, model: string, proxy: string, img_base: string | null, img_key: string | null, img_model: string | null, };
+
+export type AnimType = "fade-up" | "fade" | "scale" | "zoom" | "slide-l" | "slide-r" | "pop" | "rotate" | "bounce" | "flip" | "blur";
+
+export type ChartItem = { label: string | null, value: number | null, };
+
+export type ChartType = "bar" | "line" | "pie" | "area" | "doughnut" | "radar" | "hbar" | "progress";
+
+export type ChatMessage = { role: string, content: string, };
+
+export type Deck = { v: number, theme: string, slides: Array<Slide>, chat_id: string | null, };
+
+export type ElementStyle = { font_size: number | null, color: string | null, align: string | null, bold: boolean | null, italic: boolean | null, anim: string | null, label: string | null, label_color: string | null, label_size: number | null, fit: string | null, shape_type: ShapeType | null, fill: string | null, gradient: boolean | null, opacity: number | null, radius: number | null, max: number | null, chart_type: ChartType | null, legend: boolean | null, stack: boolean | null, grid: boolean | null, header: boolean | null, lang: string | null, inline: boolean | null, icon: string | null, accent: string | null, };
+
+export type ElementType = "title" | "text" | "list" | "stat" | "quote" | "image" | "shape" | "chart" | "card" | "table" | "code" | "formula";
+
+export type LibItem = { id: string, name: string, deck: Deck, created_at: number, updated_at: number, };
+
+export type PageTemplate = { id: string, name: string, category: string, background: string, elements: Array<SlideElement>, created_at: number | null, };
+
+export type RichLine = { segments: Array<RichSegment>, };
+
+export type RichSegment = { text: string, bold: boolean | null, italic: boolean | null, underline: boolean | null, strike: boolean | null, color: string | null, highlight: boolean | null, code: boolean | null, sup: boolean | null, sub: boolean | null, font_size: number | null, link: string | null, };
+
+export type ShapeType = "rect" | "circle" | "triangle";
+
+export type Slide = { id: string, background: string, elements: Array<SlideElement>, };
+
+export type SlideElement = { id: string, type: string, x: number, y: number, w: number, h: number, content: string, style: ElementStyle, segments: Array<RichLine> | null, };
+
+export type Theme = { name: string, primary: string, accent: string, bg: string, panel: string, text: string, muted: string, };
diff --git a/src-tauri/src/color.rs b/src-tauri/src/color.rs
new file mode 100644
index 0000000..b6b7f35
--- /dev/null
+++ b/src-tauri/src/color.rs
@@ -0,0 +1,212 @@
+/* =====================================================================
+ * color.rs — 颜色/背景解析纯函数（对应 store.ts 的颜色函数）
+ *
+ * 这些函数供 Rust 端的渲染/序列化使用（B2 store 迁移时调用）。
+ * 当前阶段保持与 TS 版本完全一致的逻辑。
+ * ===================================================================== */
+
+pub fn hex_to_rgb(hex: &str) -> Option<(u8, u8, u8)> {
+    let c = hex.trim_start_matches('#');
+    let full = if c.len() == 3 {
+        format!(
+            "{}{}{}{}{}{}",
+            &c[0..1],
+            &c[0..1],
+            &c[1..2],
+            &c[1..2],
+            &c[2..3],
+            &c[2..3]
+        )
+    } else {
+        c.to_string()
+    };
+    if full.len() < 6 {
+        return None;
+    }
+    let r = u8::from_str_radix(&full[0..2], 16).ok()?;
+    let g = u8::from_str_radix(&full[2..4], 16).ok()?;
+    let b = u8::from_str_radix(&full[4..6], 16).ok()?;
+    Some((r, g, b))
+}
+
+pub fn is_dark_hex(hex: &str) -> bool {
+    match hex_to_rgb(hex) {
+        Some((r, g, b)) => (0.299 * r as f64 + 0.587 * g as f64 + 0.114 * b as f64) < 145.0,
+        None => false,
+    }
+}
+
+pub fn shade(hex: &str, pct: f64) -> String {
+    let (r, g, b) = match hex_to_rgb(hex) {
+        Some(rgb) => rgb,
+        None => return hex.to_string(),
+    };
+    let f = if pct < 0.0 { 0.0 } else { 255.0 };
+    let p = pct.abs() / 100.0;
+    let nr = ((f - r as f64) * p + r as f64).round() as u8;
+    let ng = ((f - g as f64) * p + g as f64).round() as u8;
+    let nb = ((f - b as f64) * p + b as f64).round() as u8;
+    format!("#{:02x}{:02x}{:02x}", nr, ng, nb)
+}
+
+pub fn is_dark_bg(bg: &str) -> bool {
+    if bg.is_empty() {
+        return false;
+    }
+    if bg.starts_with('#') {
+        return is_dark_hex(bg);
+    }
+    if bg == "primary" || bg == "accent" {
+        return true;
+    }
+    if bg.starts_with("g-") {
+        return true;
+    }
+    false
+}
+
+pub fn is_valid_hex(s: &str) -> bool {
+    s.starts_with('#')
+        && s.len() >= 4
+        && s[1..].chars().all(|c| c.is_ascii_hexdigit())
+}
+
+/// 颜色解析：dark=true 时深色文字键反相为浅色
+pub fn resolve_color(key: &str, dark: bool, theme: &crate::model::Theme) -> String {
+    if key.is_empty() {
+        return String::new();
+    }
+    if key.starts_with('#') {
+        if !is_valid_hex(key) {
+            return if dark {
+                "#ffffff".into()
+            } else {
+                theme.text.clone()
+            };
+        }
+        if dark && is_dark_hex(key) {
+            return "#ffffff".into();
+        }
+        return key.into();
+    }
+    if dark {
+        match key {
+            "text" => "#ffffff".into(),
+            "muted" => "rgba(255,255,255,0.72)".into(),
+            "primary" => "#ffffff".into(),
+            "accent" => theme.accent.clone(),
+            _ => "#ffffff".into(),
+        }
+    } else {
+        match key {
+            "primary" => theme.primary.clone(),
+            "accent" => theme.accent.clone(),
+            "text" => theme.text.clone(),
+            "muted" => theme.muted.clone(),
+            _ => theme.text.clone(),
+        }
+    }
+}
+
+/// 背景解析：渐变键 → CSS gradient
+pub fn resolve_bg(key: &str, theme: &crate::model::Theme) -> String {
+    if key.is_empty() {
+        return "#ffffff".into();
+    }
+    if key.starts_with('#') {
+        return if is_valid_hex(key) {
+            key.into()
+        } else {
+            "#ffffff".into()
+        };
+    }
+    match key {
+        "g-primary" => format!(
+            "linear-gradient(135deg, {} 0%, {} 100%)",
+            theme.primary, theme.accent
+        ),
+        "g-deep" => format!(
+            "linear-gradient(160deg, {} 0%, {} 100%)",
+            shade(&theme.primary, -28.0),
+            theme.primary
+        ),
+        "g-soft" => format!(
+            "linear-gradient(135deg, {} 0%, {} 100%)",
+            theme.panel.clone(),
+            theme.bg.clone()
+        ),
+        "primary" => theme.primary.clone(),
+        "accent" => theme.accent.clone(),
+        "panel" => theme.panel.clone(),
+        "bg" => theme.bg.clone(),
+        _ => "#ffffff".into(),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_hex_to_rgb() {
+        assert_eq!(hex_to_rgb("#4f46e5"), Some((79, 70, 229)));
+        assert_eq!(hex_to_rgb("#fff"), Some((255, 255, 255)));
+        assert_eq!(hex_to_rgb("invalid"), None);
+    }
+
+    #[test]
+    fn test_is_dark_hex() {
+        assert!(is_dark_hex("#0f172a")); // 深色
+        assert!(is_dark_hex("#4f46e5")); // 青蓝偏深
+        assert!(!is_dark_hex("#ffffff")); // 白色
+        assert!(!is_dark_hex("#f59e0b")); // 琥珀亮色
+    }
+
+    #[test]
+    fn test_is_dark_bg() {
+        assert!(is_dark_bg("primary"));
+        assert!(is_dark_bg("g-deep"));
+        assert!(!is_dark_bg("bg"));
+        assert!(!is_dark_bg("panel"));
+    }
+
+    #[test]
+    fn test_shade() {
+        let result = shade("#000000", 50.0);
+        assert_eq!(result, "#808080"); // 黑色提亮 50% → 灰色
+    }
+
+    #[test]
+    fn test_resolve_color_light() {
+        use crate::model::Theme;
+        let theme = Theme {
+            name: "test".into(),
+            primary: "#4f46e5".into(),
+            accent: "#06b6d4".into(),
+            bg: "#ffffff".into(),
+            panel: "#f8fafc".into(),
+            text: "#1e293b".into(),
+            muted: "#64748b".into(),
+        };
+        assert_eq!(resolve_color("primary", false, &theme), "#4f46e5");
+        assert_eq!(resolve_color("text", false, &theme), "#1e293b");
+    }
+
+    #[test]
+    fn test_resolve_color_dark() {
+        use crate::model::Theme;
+        let theme = Theme {
+            name: "test".into(),
+            primary: "#4f46e5".into(),
+            accent: "#06b6d4".into(),
+            bg: "#ffffff".into(),
+            panel: "#f8fafc".into(),
+            text: "#1e293b".into(),
+            muted: "#64748b".into(),
+        };
+        // 深色背景下 text 键 → 白色
+        assert_eq!(resolve_color("text", true, &theme), "#ffffff");
+        // primary 键在深色背景下也 → 白色
+        assert_eq!(resolve_color("primary", true, &theme), "#ffffff");
+    }
+}
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index deefd12..7d01495 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -1,19 +1,44 @@
 /* =====================================================================
- * lib.rs — Tauri 应用入口（B0 脚手架）
+ * lib.rs — Tauri 应用入口
  *
- * 当前阶段：Vue 前端原样跑在 WebView 里，Rust 端只有 ping 验证 IPC。
- * 后续 B1-B5 逐步迁移核心逻辑到 Rust。
+ * B0: 脚手架 + ping IPC
+ * B1: 数据模型（model.rs）+ 颜色纯函数（color.rs）
+ * B2: store 迁移（待实现）
+ * B3: AI 引擎迁移（待实现）
  * ===================================================================== */
 
-/// IPC 验证命令：前端 invoke('ping') → 返回 'pong'
+mod color;
+mod model;
+
+/// IPC 验证命令
 #[tauri::command]
 fn ping() -> String {
     "pong".to_string()
 }
 
+/// 返回应用版本信息
+#[tauri::command]
+fn app_info() -> serde_json::Value {
+    serde_json::json!({
+        "name": "u-ppt",
+        "version": env!("CARGO_PKG_VERSION"),
+        "platform": std::env::consts::OS,
+    })
+}
+
 pub fn run() {
     tauri::Builder::default()
-        .invoke_handler(tauri::generate_handler![ping])
+        .invoke_handler(tauri::generate_handler![ping, app_info])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_ping() {
+        assert_eq!(ping(), "pong");
+    }
+}
diff --git a/src-tauri/src/model.rs b/src-tauri/src/model.rs
new file mode 100644
index 0000000..dbbf639
--- /dev/null
+++ b/src-tauri/src/model.rs
@@ -0,0 +1,307 @@
+/* =====================================================================
+ * model.rs — 数据模型（对应 src/core/types.ts）
+ *
+ * 所有结构体 derive Serialize/Deserialize/TS，确保：
+ *   - serde: JSON 序列化（Rust ↔ IPC ↔ JS）
+ *   - ts-rs: 自动生成 TypeScript 类型定义（Rust ↔ TS 类型同步）
+ *
+ * 运行 `cargo test --features export-types` 会在 ../bindings/ 生成 .ts 文件。
+ * ===================================================================== */
+use serde::{Deserialize, Serialize};
+use ts_rs::TS;
+
+/* ---------- 颜色 / 背景 / 动画 ---------- */
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub enum ChartType {
+    #[serde(rename = "bar")]
+    Bar,
+    #[serde(rename = "line")]
+    Line,
+    #[serde(rename = "pie")]
+    Pie,
+    #[serde(rename = "area")]
+    Area,
+    #[serde(rename = "doughnut")]
+    Doughnut,
+    #[serde(rename = "radar")]
+    Radar,
+    #[serde(rename = "hbar")]
+    Hbar,
+    #[serde(rename = "progress")]
+    Progress,
+}
+
+impl Default for ChartType {
+    fn default() -> Self {
+        ChartType::Bar
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub enum ShapeType {
+    #[serde(rename = "rect")]
+    Rect,
+    #[serde(rename = "circle")]
+    Circle,
+    #[serde(rename = "triangle")]
+    Triangle,
+}
+
+impl Default for ShapeType {
+    fn default() -> Self {
+        ShapeType::Rect
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub enum AnimType {
+    #[serde(rename = "fade-up")]
+    FadeUp,
+    #[serde(rename = "fade")]
+    Fade,
+    #[serde(rename = "scale")]
+    Scale,
+    #[serde(rename = "zoom")]
+    Zoom,
+    #[serde(rename = "slide-l")]
+    SlideL,
+    #[serde(rename = "slide-r")]
+    SlideR,
+    #[serde(rename = "pop")]
+    Pop,
+    #[serde(rename = "rotate")]
+    Rotate,
+    #[serde(rename = "bounce")]
+    Bounce,
+    #[serde(rename = "flip")]
+    Flip,
+    #[serde(rename = "blur")]
+    Blur,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub enum ElementType {
+    #[serde(rename = "title")]
+    Title,
+    #[serde(rename = "text")]
+    Text,
+    #[serde(rename = "list")]
+    List,
+    #[serde(rename = "stat")]
+    Stat,
+    #[serde(rename = "quote")]
+    Quote,
+    #[serde(rename = "image")]
+    Image,
+    #[serde(rename = "shape")]
+    Shape,
+    #[serde(rename = "chart")]
+    Chart,
+    #[serde(rename = "card")]
+    Card,
+    #[serde(rename = "table")]
+    Table,
+    #[serde(rename = "code")]
+    Code,
+    #[serde(rename = "formula")]
+    Formula,
+}
+
+/* ---------- 主题 ---------- */
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct Theme {
+    pub name: String,
+    pub primary: String,
+    pub accent: String,
+    pub bg: String,
+    pub panel: String,
+    pub text: String,
+    pub muted: String,
+}
+
+/* ---------- 富文本 ---------- */
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct RichSegment {
+    pub text: String,
+    pub bold: Option<bool>,
+    pub italic: Option<bool>,
+    pub underline: Option<bool>,
+    pub strike: Option<bool>,
+    pub color: Option<String>,
+    pub highlight: Option<bool>,
+    pub code: Option<bool>,
+    #[serde(rename = "sup")]
+    pub sup_: Option<bool>,
+    #[serde(rename = "sub")]
+    pub sub_: Option<bool>,
+    pub font_size: Option<f64>,
+    pub link: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct RichLine {
+    pub segments: Vec<RichSegment>,
+}
+
+/* ---------- 元素 ---------- */
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct ElementStyle {
+    pub font_size: Option<f64>,
+    pub color: Option<String>,
+    pub align: Option<String>,
+    pub bold: Option<bool>,
+    pub italic: Option<bool>,
+    pub anim: Option<String>,
+    // stat
+    pub label: Option<String>,
+    pub label_color: Option<String>,
+    pub label_size: Option<f64>,
+    // image
+    pub fit: Option<String>,
+    // shape
+    pub shape_type: Option<ShapeType>,
+    pub fill: Option<String>,
+    pub gradient: Option<bool>,
+    pub opacity: Option<f64>,
+    pub radius: Option<f64>,
+    // chart
+    pub max: Option<f64>,
+    pub chart_type: Option<ChartType>,
+    pub legend: Option<bool>,
+    pub stack: Option<bool>,
+    pub grid: Option<bool>,
+    // table
+    pub header: Option<bool>,
+    // code
+    pub lang: Option<String>,
+    // formula
+    #[serde(rename = "inline")]
+    pub inline_: Option<bool>,
+    // card
+    pub icon: Option<String>,
+    pub accent: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct SlideElement {
+    pub id: String,
+    #[serde(rename = "type")]
+    pub element_type: String,
+    pub x: f64,
+    pub y: f64,
+    pub w: f64,
+    pub h: f64,
+    pub content: String,
+    pub style: ElementStyle,
+    pub segments: Option<Vec<RichLine>>,
+}
+
+/* ---------- 幻灯片 / Deck ---------- */
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct Slide {
+    pub id: String,
+    pub background: String,
+    pub elements: Vec<SlideElement>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct Deck {
+    pub v: i32,
+    pub theme: String,
+    pub slides: Vec<Slide>,
+    pub chat_id: Option<String>,
+}
+
+/* ---------- AI 配置 ---------- */
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct AiCfg {
+    pub preset: String,
+    pub protocol: String,
+    pub base: String,
+    pub key: String,
+    pub model: String,
+    pub proxy: String,
+    pub img_base: Option<String>,
+    pub img_key: Option<String>,
+    pub img_model: Option<String>,
+}
+
+/* ---------- 文库 ---------- */
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct LibItem {
+    pub id: String,
+    pub name: String,
+    pub deck: Deck,
+    pub created_at: f64,
+    pub updated_at: f64,
+}
+
+/* ---------- 模板 ---------- */
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct PageTemplate {
+    pub id: String,
+    pub name: String,
+    pub category: String,
+    pub background: String,
+    pub elements: Vec<SlideElement>,
+    pub created_at: Option<f64>,
+}
+
+/* ---------- 会话 ---------- */
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct ChatMessage {
+    pub role: String,
+    pub content: String,
+}
+
+/* ---------- Op Log（对应 src/core/op.ts） ---------- */
+
+/// Op 的 payload 是任意 JSON（不导出 TS，因为 payload 是动态的）
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Op {
+    #[serde(rename = "type")]
+    pub op_type: String,
+    pub client_id: Option<String>,
+    pub timestamp: Option<f64>,
+    #[serde(flatten)]
+    pub payload: serde_json::Value,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct HistoryEntry {
+    pub forward: Op,
+    pub backward: Op,
+}
+
+/* ---------- 图表数据 ---------- */
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[ts(export, export_to = "../bindings/types.ts")]
+pub struct ChartItem {
+    pub label: Option<String>,
+    pub value: Option<f64>,
+}