chore(lightbox): update package-lock.json

卡片 16:9 仍偏高，统一改为 21:9(超宽荧幕比例)，前后台一致:
- input.css: .blur-img.post-card-cover-blur aspect-ratio 16/9 → 21/9
- post_card.rs: 缩略图 thumb=400x225 → 420x180 匹配 21:9
- write.rs: 编辑器封面区 aspect-video → aspect-[21/9]

Cargo.toml

@@ -40,7 +40,7 @@ futures = { version = "0.3", optional = true }
 bytes = { version = "1", optional = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
-web-sys = { version = "0.3", features = ["Document", "Window", "Storage", "Element", "HtmlElement", "DomTokenList", "MediaQueryList", "HtmlImageElement", "MouseEvent", "KeyboardEvent", "Node", "EventTarget", "Navigator", "File", "FormData", "Request", "RequestInit", "Response", "Headers"] }
+web-sys = { version = "0.3", features = ["Document", "Window", "Storage", "Element", "HtmlElement", "DomTokenList", "MediaQueryList", "HtmlImageElement", "MouseEvent", "KeyboardEvent", "Node", "EventTarget", "Navigator", "File", "FileList", "FormData", "Request", "RequestInit", "Response", "Headers", "ClipboardEvent", "DataTransfer", "HtmlInputElement"] }
 wasm-bindgen = "0.2"
 wasm-bindgen-futures = "0.4"
 js-sys = "0.3"

input.css

@@ -526,10 +526,13 @@
     text-underline-offset: 0.3rem;
   }
 
-  /* 卡片封面：blur-img 结构，固定 4:3 比例，hover 缩放 */
-  .post-card-cover-blur {
+  /* 卡片封面：blur-img 结构，固定 21:9 比例，hover 缩放。
+     双类选择器提升特异性，可靠覆盖 .blur-img 的 aspect-ratio: var(--ar)
+     （卡片不写 --ar，var(--ar) 解析为空会导致高度塌陷）。
+     21:9 与后台编辑器封面区统一比例，宽屏横幅式。 */
+  .blur-img.post-card-cover-blur {
     margin: 0;
-    aspect-ratio: 4 / 3;
+    aspect-ratio: 21 / 9;
   }
   .post-card-cover-blur img {
     width: 100%;
@@ -566,6 +569,65 @@
   .post-card-accent:hover::after {
     width: 100%;
   }
+
+  /* ========== Blur-up 渐进图片加载 ==========
+     放在 @layer components 内，与 .blur-img.post-card-cover-blur 同层，
+     这样特异性能正常生效（layer 外规则会无条件覆盖 layer 内规则，
+     导致卡片的 aspect-ratio:4/3 败给全局 var(--ar)）。 */
+  .blur-img {
+    position: relative;
+    display: block;
+    overflow: hidden;
+    aspect-ratio: var(--ar);
+    /* 加载中灰底（占位图未加载完时） */
+    background: var(--color-paper-code-bg, #f5f5f5);
+    border-radius: 6px;
+    margin: 1em 0;
+  }
+  .blur-img-placeholder {
+    position: absolute;
+    inset: 0;
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+    /* 重置 .md-content img 的 margin/max-width/height，避免把 absolute 图层推偏 */
+    margin: 0;
+    max-width: none;
+    /* 20px 占位图放大后模糊，scale 遮边缘 */
+    filter: blur(20px) saturate(1.2);
+    transform: scale(1.1);
+    transition: opacity 0.4s ease;
+  }
+  .blur-img-full {
+    position: absolute;
+    inset: 0;
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+    /* 重置 .md-content img 的 margin/max-width/height，避免把 absolute 图层推偏 */
+    margin: 0;
+    max-width: none;
+    opacity: 0;
+    z-index: 1;
+  }
+  /* full 加载完成后由 JS 直接设 opacity:1（不依赖 CSS transition，
+     避免合成层重绘时机导致 opacity 卡在 0）。 */
+  .blur-img-full.is-loaded,
+  .blur-img.is-loaded .blur-img-full {
+    opacity: 1;
+  }
+  /* 容器标记 loaded 后：显式隐藏占位图 + 去掉灰底，避免重绘时机导致残留/灰边 */
+  .blur-img.is-loaded .blur-img-placeholder {
+    opacity: 0;
+  }
+  .blur-img.is-loaded {
+    background: transparent;
+  }
+
+  /* 暗色模式灰底 */
+  .dark .blur-img {
+    background: var(--color-paper-code-bg, #2a2a2a);
+  }
 }
 
 @keyframes fadeIn {
@@ -638,58 +700,4 @@
   }
 }
 
-/* ========== Blur-up 渐进图片加载 ========== */
-.blur-img {
-  position: relative;
-  display: block;
-  overflow: hidden;
-  aspect-ratio: var(--ar);
-  /* 加载中灰底（占位图未加载完时） */
-  background: var(--color-paper-code-bg, #f5f5f5);
-  border-radius: 6px;
-  margin: 1em 0;
-}
-.blur-img-placeholder {
-  position: absolute;
-  inset: 0;
-  width: 100%;
-  height: 100%;
-  object-fit: cover;
-  /* 重置 .md-content img 的 margin/max-width/height，避免把 absolute 图层推偏 */
-  margin: 0;
-  max-width: none;
-  /* 20px 占位图放大后模糊，scale 遮边缘 */
-  filter: blur(20px) saturate(1.2);
-  transform: scale(1.1);
-  transition: opacity 0.4s ease;
-}
-.blur-img-full {
-  position: absolute;
-  inset: 0;
-  width: 100%;
-  height: 100%;
-  object-fit: cover;
-  /* 重置 .md-content img 的 margin/max-width/height，避免把 absolute 图层推偏 */
-  margin: 0;
-  max-width: none;
-  opacity: 0;
-  z-index: 1;
-}
-/* full 加载完成后由 JS 直接设 opacity:1（不依赖 CSS transition，
-   避免合成层重绘时机导致 opacity 卡在 0）。 */
-.blur-img-full.is-loaded,
-.blur-img.is-loaded .blur-img-full {
-  opacity: 1;
-}
-/* 容器标记 loaded 后：显式隐藏占位图 + 去掉灰底，避免重绘时机导致残留/灰边 */
-.blur-img.is-loaded .blur-img-placeholder {
-  opacity: 0;
-}
-.blur-img.is-loaded {
-  background: transparent;
-}
-
-/* 暗色模式灰底 */
-.dark .blur-img {
-  background: var(--color-paper-code-bg, #2a2a2a);
-}
+/* ========== Blur-up 渐进图片加载（已移入 @layer components） ========== */

libs/lightbox/package-lock.json

@@ -14,29 +14,6 @@
         "vitest": "^4.1.9"
       }
     },
-    "node_modules/@emnapi/core": {
-      "version": "1.11.1",
-      "resolved": "https://registry.npmmirror.com/@emnapi/core/-/core-1.11.1.tgz",
-      "integrity": "sha512-RSvbQmHzdKzNsLYa/wHrbc3KN4sYLKAdPZxqiM2HATqv/SBk2/ENSHpvXGaLOMcsAyz0poEGqkmmKYG3OWiJEQ==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "dependencies": {
-        "@emnapi/wasi-threads": "1.2.2",
-        "tslib": "^2.4.0"
-      }
-    },
-    "node_modules/@emnapi/runtime": {
-      "version": "1.11.1",
-      "resolved": "https://registry.npmmirror.com/@emnapi/runtime/-/runtime-1.11.1.tgz",
-      "integrity": "sha512-vgj7R3y3Wgx24IQaGPA/R6YFXLHVMOZ0uVEyIQPaWs+rd1AzfEMXlAC22FYwO1XkKR6NPsq7mUandH8oIRdZFw==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "dependencies": {
-        "tslib": "^2.4.0"
-      }
-    },
     "node_modules/@emnapi/wasi-threads": {
       "version": "1.2.2",
       "resolved": "https://registry.npmmirror.com/@emnapi/wasi-threads/-/wasi-threads-1.2.2.tgz",
@@ -177,9 +154,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -197,9 +171,23 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
       ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-ppc64-gnu": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmmirror.com/@rolldown/binding-linux-ppc64-gnu/-/binding-linux-ppc64-gnu-1.1.2.tgz",
+      "integrity": "sha512-X/7bVLWelEsbyWDUSXt7zVsTniLLPIY2n1rH58qr78l9i7MNbbxBWD8gI2vRfBWf4NUXJCUuQnfZDsp32LqsfQ==",
+      "cpu": [
+        "ppc64"
+      ],
+      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -217,9 +205,6 @@
         "s390x"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -237,9 +222,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -257,9 +239,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -658,6 +637,7 @@
       "integrity": "sha512-6QD0ilzDDt93tX44y8tbmZdAcdTRYDhUP+Asgi6pC8Pp5IA3cvaZGyoVN/EGtlq9ziT65iPuBBn3ASLr6hCgVw==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@types/node": ">=20.0.0",
         "@types/whatwg-mimetype": "^3.0.2",
@@ -814,9 +794,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -838,9 +815,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -862,9 +836,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -886,9 +857,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -1007,6 +975,7 @@
       "integrity": "sha512-QP88BAKvMam/3NxH6vj2o21R6MjxZUAd6nlwAS/pnGvN9IVLocLHxGYIzFhg6fUQ+5th6P4dv4eW9jX3DSIj7A==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -1187,6 +1156,7 @@
       "integrity": "sha512-BuJcQK/56NQTWDGn4ABea3q4SSBdNPWwNZKTkkUpcMPnLoquSYH8llRtSUIgoL1KSCpHt5eghLShn50mH36y7Q==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "lightningcss": "^1.32.0",
         "picomatch": "^4.0.4",

src/components/post_card.rs

@@ -47,7 +47,7 @@ pub fn PostCard(post: PostListItem) -> Element {
                         }
                         img {
                             class: "blur-img-full is-loaded",
-                            src: "{cover_src}?thumb=400x300",
+                            src: "{cover_src}?thumb=420x180",
                             alt: "{post.title}",
                         }
                     }

src/pages/admin/write.rs

@@ -15,14 +15,23 @@ use crate::api::posts::{
     create_post, get_post_by_id, update_post, CreatePostResponse, SinglePostResponse,
 };
 #[cfg(target_arch = "wasm32")]
-use crate::tiptap_bridge::{consume_upload_event, EditorHandle};
+use crate::tiptap_bridge::{consume_upload_event, upload_image_file, EditorHandle};
 // 共享上传状态类型：两端都编译（rsx 在 server SSR 时也要渲染这些结构）。
-use crate::tiptap_bridge::{UploadErrorEntry, UploadsInFlight};
 use crate::components::write_skeleton::WriteSkeleton;
 use crate::models::post::Post;
 use crate::router::Route;
+use crate::tiptap_bridge::{UploadErrorEntry, UploadsInFlight};
 #[cfg(target_arch = "wasm32")]
 use wasm_bindgen::closure::Closure;
+// 封面图上传：从 Dioxus 事件拿底层 web_sys::File，以及 paste 事件的原始 web 事件。
+// 这三个 trait 仅在 WASM 端可用（dioxus-web 提供），通过 dioxus 的 re-export 访问：
+// - HasFileData：evt.files()（FormEvent / DragEvent 取文件）— dioxus::html
+// - WebFileExt：file.get_web_file()（FileData 取底层 web_sys::File）— dioxus::web
+// - WebEventExt：evt.try_as_web_event()（ClipboardEvent 取原始 web 事件）— dioxus::web
+#[cfg(target_arch = "wasm32")]
+use dioxus::html::HasFileData;
+#[cfg(target_arch = "wasm32")]
+use dioxus::web::{WebEventExt, WebFileExt};
 
 /// 新建文章页面组件。
 ///
@@ -62,6 +71,13 @@ fn write_editor(post_id: Option<i32>) -> Element {
     let mut cover_image = use_signal(|| "".to_string());
     let mut status = use_signal(|| "draft".to_string());
     let mut content = use_signal(|| "".to_string());
+    // 封面图上传状态：uploading 进度态、错误消息、URL 输入框展开、拖拽高亮。
+    let mut cover_uploading = use_signal(|| false);
+    let mut cover_error = use_signal(|| None::<String>);
+    let mut cover_url_mode = use_signal(|| false);
+    let mut cover_drag_active = use_signal(|| false);
+    // 封面 URL 输入框的临时值（确认前不直接写入 cover_image，避免半截 URL 触发预览加载）。
+    let mut cover_url_input = use_signal(|| "".to_string());
     // 页面与编辑器加载、保存、错误、成功等状态。
     let mut loading = use_signal(|| true);
     let mut saving = use_signal(|| false);
@@ -181,13 +197,8 @@ fn write_editor(post_id: Option<i32>) -> Element {
                     }
                     editor_content_set.set(true);
                 }
-                let handle = EditorHandle::new(
-                    inst,
-                    on_update,
-                    on_image_upload,
-                    on_ready,
-                    on_upload_event,
-                );
+                let handle =
+                    EditorHandle::new(inst, on_update, on_image_upload, on_ready, on_upload_event);
                 editor.set(Some(handle));
             }
             Ok(None) => {
@@ -216,21 +227,54 @@ fn write_editor(post_id: Option<i32>) -> Element {
         loading.set(false);
     });
 
+    // 封面图上传：spawn 一个 async 调用 upload_image_file。
+    // 三条入口（file input / drop / paste）收敛成拿到 web_sys::File 后统一调用此闭包。
+    // 仅在 WASM 端有意义（upload_image_file 与 spawn 都依赖 WASM 运行时），
+    // server SSR 不渲染上传逻辑，故整体 cfg-gate 避免引用 wasm-only 符号。
+    #[cfg(target_arch = "wasm32")]
+    let mut spawn_cover_upload = move |file: web_sys::File| {
+        cover_uploading.set(true);
+        cover_error.set(None);
+        spawn(async move {
+            match upload_image_file(file).await {
+                Ok(url) => {
+                    cover_image.set(url);
+                }
+                Err(msg) => {
+                    cover_error.set(Some(msg));
+                }
+            }
+            cover_uploading.set(false);
+        });
+    };
+
     // 提交表单：校验标题与内容，读取 Tiptap 编辑器 Markdown，调用 create_post 或 update_post。
     let on_submit = move |_| {
         // 上传未完成/失败拦截：有占位符时阻止保存
         let in_flight = uploads_in_flight.read();
         if in_flight.uploading > 0 || in_flight.error > 0 {
             let msg = if in_flight.uploading > 0 {
-                format!("有 {} 张图片正在上传，请等待完成后再保存", in_flight.uploading)
+                format!(
+                    "有 {} 张图片正在上传，请等待完成后再保存",
+                    in_flight.uploading
+                )
             } else {
-                format!("有 {} 张图片上传失败，请移除或重试后再保存", in_flight.error)
+                format!(
+                    "有 {} 张图片上传失败，请移除或重试后再保存",
+                    in_flight.error
+                )
             };
             error.set(Some(msg));
             return;
         }
         drop(in_flight);
 
+        // 封面图上传中拦截：防止保存半成品。
+        if cover_uploading() {
+            error.set(Some("封面图正在上传，请等待完成后再保存".to_string()));
+            return;
+        }
+
         if title().trim().is_empty() {
             error.set(Some("标题不能为空".to_string()));
         }
@@ -384,8 +428,13 @@ fn write_editor(post_id: Option<i32>) -> Element {
                 }
             }
 
-            // 顶部元信息区域 - 固定高度，不滚动
-            div { class: "flex-shrink-0 space-y-5 pt-8",
+            // 可滚动主体：元信息 + 编辑器 + 内联错误提示。
+            // 底部操作栏留在此容器外（固定吸底），保证保存/状态按钮始终可见。
+            // flex flex-col：让内部 flex-1 编辑器能撑满剩余高度；
+            // overflow-y-auto：内容超出时滚动（min-h-0 允许 flex 子项收缩触发滚动）。
+            div { class: "flex-1 min-h-0 overflow-y-auto flex flex-col",
+                // 顶部元信息区域 - 固定高度，不滚动
+                div { class: "flex-shrink-0 space-y-5 pt-8",
                 // 标题区域 - 大字号无框输入
                 div {
                     input {
@@ -398,7 +447,7 @@ fn write_editor(post_id: Option<i32>) -> Element {
 
                 // 摘要
                 textarea {
-                    class: "w-full text-base bg-transparent text-[var(--color-paper-secondary)] placeholder-[var(--color-paper-tertiary)] focus:outline-none resize-none leading-relaxed",
+                    class: "w-full text-base bg-transparent text-[var(--color-paper-secondary)] placeholder-[var(--color-paper-tertiary)] focus:outline-none resize-none leading-relaxed mb-0",
                     placeholder: "摘要（留空则自动生成）",
                     rows: "2",
                     value: "{summary}",
@@ -429,22 +478,254 @@ fn write_editor(post_id: Option<i32>) -> Element {
                             oninput: move |evt| tags.set(evt.value()),
                         }
                     }
-                    div { class: "flex-1 min-w-[140px]",
-                        label { class: "{META_LABEL_CLASS}",
-                            "封面图"
+                }
+
+                // 封面图上传区：空态矮横条（不挤压编辑器），有图时展开成 21:9 超宽预览。
+                // 21:9 与首页卡片封面统一比例，比 16:9 更扁，适合宽屏横幅式封面。
+                // 容器统一绑定拖拽与粘贴事件；内部按 cover_image / cover_uploading 切换空态、上传中、预览。
+                div {
+                    class: "relative w-full rounded-xl border border-dashed overflow-hidden transition-all duration-200 group/cover",
+                    // 空态矮横条；有图/上传中展开成 21:9。
+                    class: if cover_image().is_empty() && !cover_uploading() {
+                        "h-14"
+                    } else {
+                        "aspect-[21/9]"
+                    },
+                    class: if cover_drag_active() {
+                        "border-[var(--color-paper-accent)] bg-[var(--color-paper-accent-soft)]"
+                    } else if cover_image().is_empty() {
+                        "border-[var(--color-paper-border)] bg-[var(--color-paper-entry)] hover:border-[var(--color-paper-accent)] hover:bg-[var(--color-paper-accent-soft)]"
+                    } else {
+                        "border-[var(--color-paper-border)] bg-[var(--color-paper-entry)]"
+                    },
+
+                    // 整个容器可接收拖拽与粘贴（ondragover 必须 prevent_default，否则浏览器直接打开文件）。
+                    ondragover: move |evt| {
+                        evt.prevent_default();
+                        if !cover_uploading() && cover_image().is_empty() {
+                            cover_drag_active.set(true);
                         }
+                    },
+                    ondragenter: move |evt| {
+                        evt.prevent_default();
+                    },
+                    ondragleave: move |_| {
+                        cover_drag_active.set(false);
+                    },
+                    ondrop: move |evt| {
+                        evt.prevent_default();
+                        cover_drag_active.set(false);
+                        if !cover_uploading() && cover_image().is_empty() {
+                            #[cfg(target_arch = "wasm32")]
+                            {
+                                if let Some(file) = evt.files().into_iter().next() {
+                                    if let Some(web_file) = file.get_web_file() {
+                                        spawn_cover_upload(web_file);
+                                    }
+                                }
+                            }
+                        }
+                    },
+                    onpaste: move |evt| {
+                        evt.prevent_default();
+                        if !cover_uploading() && cover_image().is_empty() {
+                            #[cfg(target_arch = "wasm32")]
+                            {
+                                use wasm_bindgen::JsCast;
+                                if let Some(raw) = evt.try_as_web_event() {
+                                    if let Some(ce) = raw.dyn_ref::<web_sys::ClipboardEvent>() {
+                                        if let Some(dt) = ce.clipboard_data() {
+                                            if let Some(file_list) = dt.files() {
+                                                if let Some(file) = file_list.item(0) {
+                                                    spawn_cover_upload(file);
+                                                }
+                                            }
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    },
+
+                    // —— 上传中：骨架占位 + 文案 ——
+                    if cover_uploading() {
+                        div { class: "absolute inset-0 flex flex-col items-center justify-center gap-3 bg-[var(--color-paper-tertiary)]/30 animate-pulse",
+                            span { class: "text-sm text-[var(--color-paper-secondary)]",
+                                "上传中..."
+                            }
+                        }
+                    }
+
+                    // —— 有图：预览 + 移除/更换 ——
+                    if !cover_image().is_empty() && !cover_uploading() {
+                        // 预览图：/uploads/ 路径加 ?w=600 缩略，外链 URL 原样用。
+                        // 用条件表达式内联计算，避免 rsx 内 let 块（宏在 server 端解析受限）。
+                        img {
+                            class: "absolute inset-0 w-full h-full object-cover",
+                            src: {
+                                let cv = cover_image();
+                                if cv.starts_with("/uploads/") {
+                                    let base = cv.split('?').next().unwrap_or(&cv);
+                                    if cv.contains('?') { format!("{}&w=600", base) } else { format!("{}?w=600", base) }
+                                } else {
+                                    cv
+                                }
+                            },
+                            alt: "封面预览",
+                            // 外链预览加载失败时提示，避免空白。
+                            onerror: move |_| {
+                                cover_error.set(Some("封面图加载失败，请检查 URL".to_string()));
+                            },
+                        }
+                        // 右上角移除按钮（hover 出现）。
+                        button {
+                            class: "absolute top-2 right-2 w-7 h-7 flex items-center justify-center rounded-full bg-black/50 text-white opacity-0 group-hover/cover:opacity-100 transition-opacity hover:bg-black/70 cursor-pointer",
+                            aria_label: "移除封面",
+                            onclick: move |_| {
+                                cover_image.set(String::new());
+                                cover_error.set(None);
+                                cover_url_mode.set(false);
+                                cover_url_input.set(String::new());
+                            },
+                            // 内联 SVG：关闭 X（与 header.rs 关闭按钮同风格，view_box 0 0 24 24）。
+                            svg {
+                                class: "w-4 h-4",
+                                xmlns: "http://www.w3.org/2000/svg",
+                                view_box: "0 0 24 24",
+                                fill: "none",
+                                stroke: "currentColor",
+                                stroke_width: "2",
+                                stroke_linecap: "round",
+                                stroke_linejoin: "round",
+                                path { d: "M6 6l12 12M6 18L18 6" }
+                            }
+                        }
+                        // 底部渐变遮罩 + "更换封面"提示（hover 出现）。
+                        div { class: "absolute inset-x-0 bottom-0 h-12 bg-gradient-to-t from-black/50 to-transparent opacity-0 group-hover/cover:opacity-100 transition-opacity flex items-end justify-center pb-2 pointer-events-none",
+                            span { class: "text-xs text-white/90",
+                                "点击下方区域可重新上传"
+                            }
+                        }
+                    }
+
+                    // —— 空态：横向矮横条，图标+提示+URL 链 ——
+                    if cover_image().is_empty() && !cover_uploading() {
+                        // label 包裹整个空态：点击天然触发隐藏的 file input，无需 JS。
+                        label { class: "absolute inset-0 flex flex-row items-center gap-3 cursor-pointer px-4 text-left",
+                            // 上传图标（Feather 风格线框，与项目现有图标体系一致）。
+                            svg {
+                                class: "w-5 h-5 shrink-0 text-[var(--color-paper-secondary)]",
+                                xmlns: "http://www.w3.org/2000/svg",
+                                view_box: "0 0 24 24",
+                                fill: "none",
+                                stroke: "currentColor",
+                                stroke_width: "1.8",
+                                stroke_linecap: "round",
+                                stroke_linejoin: "round",
+                                path { d: "M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4" }
+                                polyline { points: "17 8 12 3 7 8" }
+                                line {
+                                    x1: "12",
+                                    y1: "3",
+                                    x2: "12",
+                                    y2: "15",
+                                }
+                            }
+                            span { class: "text-sm text-[var(--color-paper-secondary)] shrink-0",
+                                "拖拽 · 点击 · 粘贴封面图"
+                            }
+                            // URL 文字链：阻止 label 的默认 file 触发，切换到 URL 输入模式。
+                            span {
+                                class: "text-[11px] font-medium tracking-wider text-[var(--color-paper-tertiary)] hover:text-[var(--color-paper-accent)] transition-colors ml-auto shrink-0",
+                                onclick: move |evt| {
+                                    evt.prevent_default();
+                                    evt.stop_propagation();
+                                    cover_url_mode.set(true);
+                                    cover_url_input.set(cover_image());
+                                },
+                                "或使用图片 URL"
+                            }
+                            // 隐藏的 file input，由 label 点击触发。
+                            input {
+                                r#type: "file",
+                                accept: "image/jpeg,image/png,image/gif,image/webp",
+                                class: "hidden",
+                                onchange: move |evt| {
+                                    #[cfg(target_arch = "wasm32")]
+                                    {
+                                        if let Some(file) = evt.files().into_iter().next() {
+                                            if let Some(web_file) = file.get_web_file() {
+                                                spawn_cover_upload(web_file);
+                                            }
+                                        }
+                                    }
+                                    // 注意：未重置 input.value，重复选择同一文件不会再次触发 onchange。
+                                    // 这是 file input 的通用行为，封面场景影响可忽略。
+                                },
+                            }
+                        }
+                    }
+                }
+
+                // —— URL 输入模式（内联展开，空态时叠加在容器外，避免与拖拽区争抢点击）——
+                if cover_url_mode() && cover_image().is_empty() {
+                    div { class: "flex items-center gap-2 mt-2",
                         input {
-                            class: "{META_INPUT_CLASS}",
-                            placeholder: "URL（可选）",
-                            value: "{cover_image}",
-                            oninput: move |evt| cover_image.set(evt.value()),
+                            class: "flex-1 {META_INPUT_CLASS}",
+                            placeholder: "粘贴图片 URL",
+                            value: "{cover_url_input}",
+                            oninput: move |evt| cover_url_input.set(evt.value()),
+                            onkeydown: move |evt| {
+                                if evt.key() == Key::Enter {
+                                    let v = cover_url_input().trim().to_string();
+                                    if !v.is_empty() {
+                                        cover_image.set(v);
+                                        cover_error.set(None);
+                                        cover_url_mode.set(false);
+                                    }
+                                }
+                            },
+                        }
+                        button {
+                            class: "shrink-0 px-3 py-1 text-xs text-[var(--color-paper-theme)] bg-[var(--color-paper-accent)] rounded-full hover:brightness-110 active:scale-[0.98] transition-all cursor-pointer",
+                            onclick: move |_| {
+                                let v = cover_url_input().trim().to_string();
+                                if !v.is_empty() {
+                                    cover_image.set(v);
+                                    cover_error.set(None);
+                                    cover_url_mode.set(false);
+                                }
+                            },
+                            "确认"
+                        }
+                        button {
+                            class: "shrink-0 px-3 py-1 text-xs text-[var(--color-paper-secondary)] hover:text-[var(--color-paper-primary)] transition-colors cursor-pointer",
+                            onclick: move |_| {
+                                cover_url_mode.set(false);
+                                cover_url_input.set(String::new());
+                            },
+                            "取消"
+                        }
+                    }
+                }
+
+                // 封面上传失败提示：复用页面红色条风格。
+                if let Some(err) = cover_error() {
+                    div { class: "flex items-center justify-between gap-3 px-4 py-2 bg-red-50 dark:bg-red-900/20 text-red-600 dark:text-red-400 rounded-xl text-sm border border-red-100 dark:border-red-900/30 mt-2",
+                        span { "封面图: {err}" }
+                        button {
+                            class: "shrink-0 text-red-400 hover:text-red-600 cursor-pointer text-lg leading-none",
+                            aria_label: "关闭提示",
+                            onclick: move |_| cover_error.set(None),
+                            "×"
                         }
                     }
                 }
             }
 
-            // 编辑器区域 - 沾满剩余高度
-            div { class: "flex-1 min-h-0 flex flex-col my-4",
+            // 编辑器区域 - 沾满剩余高度，但保证最小编辑空间。
+            // min-h-[400px]：窗口过矮时不被元信息挤压到不可用；flex-1：窗口充裕时填充。
+            div { class: "flex-1 min-h-[400px] flex flex-col my-4",
                 div {
                     class: "flex-1 min-h-0 w-full border border-[var(--color-paper-border)] rounded-xl overflow-hidden bg-[var(--color-paper-entry)] shadow-[0_2px_8px_rgba(0,0,0,0.04)] dark:shadow-none",
                     id: "tiptap-editor",
@@ -488,9 +769,10 @@ fn write_editor(post_id: Option<i32>) -> Element {
                     }
                 }
             }
+            } // 滚动主体容器闭合
 
-            // 底部操作栏 - 在编辑器下方，左对齐
-            div { class: "flex-shrink-0 flex items-center gap-2 pt-2 pb-4",
+            // 底部操作栏 - 固定吸底，不在滚动区域内
+            div { class: "flex-shrink-0 flex items-center gap-2 pt-2 pb-4 border-t border-[var(--color-paper-border)]",
                 button {
                     class: "px-4 py-1.5 text-sm text-[var(--color-paper-secondary)] hover:text-[var(--color-paper-primary)] transition-colors cursor-pointer",
                     onclick: move |_| {

src/tiptap_bridge.rs

@@ -244,69 +244,85 @@ pub mod wasm {
 
     // —— make_upload_closure：Rust fetch 上传 ——
 
-    /// 创建图片上传 closure：FormData POST /api/upload，解析 {success, url, error}。
+    /// 通用图片上传：FormData POST /api/upload，解析 {success, url, error}。
     ///
-    /// 行为与旧版 write.rs eval 注入的 JS fetch 等价：
+    /// 由封面图上传（spawn 直接 await）与 Tiptap 编辑器上传（make_upload_closure 包 Promise）共用，
+    /// 避免两处重复同一份 fetch + 解析逻辑。
+    ///
+    /// 行为：
     /// - credentials: same-origin（携带 session cookie）
     /// - 字段名 'image'（与服务端 upload.rs 对齐）
-    /// - 成功 → resolve(url)；失败 → reject(Error(服务端中文 error))
+    /// - 成功 → Ok(url)；失败 → Err(服务端中文 error，或状态码兜底)
+    ///
+    /// 构造阶段的错误（FormData/Request 等）以 Err 返回，而非 panic，
+    /// 单张坏文件不应导致整个上传流程崩溃。
+    pub async fn upload_image_file(file: web_sys::File) -> Result<String, String> {
+        // 构造 FormData：字段名 'image' 与服务端 upload.rs 对齐
+        let form = web_sys::FormData::new().map_err(|_| "无法构造上传表单".to_string())?;
+        form.append_with_blob("image", &file)
+            .map_err(|_| "无法附加文件".to_string())?;
+
+        // 构造 POST 请求，credentials same-origin 携带 session cookie
+        let init = web_sys::RequestInit::new();
+        init.set_method("POST");
+        // set_body 接收 &JsValue（非 Option）；FormData: AsRef<JsValue>。
+        init.set_body(form.as_ref());
+        init.set_credentials(web_sys::RequestCredentials::SameOrigin);
+
+        let request = web_sys::Request::new_with_str_and_init("/api/upload", &init)
+            .map_err(|_| "无法构造上传请求".to_string())?;
+
+        let window = web_sys::window().expect("no window");
+        let promise = window.fetch_with_request(&request);
+
+        // fetch Promise → Future → 解析响应体
+        let resp_val = wasm_bindgen_futures::JsFuture::from(promise)
+            .await
+            .map_err(|e| format!("上传请求失败: {:?}", e))?;
+        let resp: web_sys::Response = resp_val
+            .dyn_into()
+            .map_err(|_| "上传响应类型异常".to_string())?;
+
+        // 读响应体文本（无论 2xx 与否，服务端都返回 JSON）
+        let text_promise = resp
+            .text()
+            .map_err(|e| format!("读取响应失败: {:?}", e))?;
+        let text_val = wasm_bindgen_futures::JsFuture::from(text_promise)
+            .await
+            .map_err(|e| format!("读取响应失败: {:?}", e))?;
+        let text = text_val.as_string().unwrap_or_default();
+
+        // 解析 {success, url, error}
+        let data: serde_json::Value =
+            serde_json::from_str(&text).unwrap_or(serde_json::Value::Null);
+
+        if data["success"].as_bool() == Some(true) {
+            let url = data["url"].as_str().unwrap_or("");
+            if !url.is_empty() {
+                Ok(url.to_string())
+            } else {
+                // success=true 但 url 为空：服务端契约异常，按失败处理
+                Err("上传成功但未返回图片地址".to_string())
+            }
+        } else {
+            // 失败：优先用服务端中文 error，兜底用状态码
+            Err(data["error"]
+                .as_str()
+                .map(|s| s.to_string())
+                .unwrap_or_else(|| format!("上传失败: {}", resp.status())))
+        }
+    }
+
+    /// 创建 Tiptap 图片上传 closure：内部复用 [`upload_image_file`]，包装成 JS Promise。
     ///
     /// 返回的 closure 签名 `(File) -> Promise` 对应 JS `onImageUpload`。
-    /// 构造阶段的错误（FormData/Request 等）以 rejected Promise 返回，
-    /// 而非 panic —— 单张坏文件不应导致整个编辑器崩溃。
     pub fn make_upload_closure() -> Closure<dyn Fn(web_sys::File) -> js_sys::Promise> {
         Closure::new(move |file: web_sys::File| -> js_sys::Promise {
             wasm_bindgen_futures::future_to_promise(async move {
-                // 构造 FormData：字段名 'image' 与服务端 upload.rs 对齐
-                let form = web_sys::FormData::new()
-                    .map_err(|_| js_sys::Error::new("无法构造上传表单"))?;
-                form.append_with_blob("image", &file)
-                    .map_err(|_| js_sys::Error::new("无法附加文件"))?;
-
-                // 构造 POST 请求，credentials same-origin 携带 session cookie
-                let init = web_sys::RequestInit::new();
-                init.set_method("POST");
-                // set_body 接收 &JsValue（非 Option）；FormData: AsRef<JsValue>。
-                init.set_body(form.as_ref());
-                init.set_credentials(web_sys::RequestCredentials::SameOrigin);
-
-                let request = web_sys::Request::new_with_str_and_init("/api/upload", &init)
-                    .map_err(|_| js_sys::Error::new("无法构造上传请求"))?;
-
-                let window = web_sys::window().expect("no window");
-                let promise = window.fetch_with_request(&request);
-
-                // 把 fetch Promise → Future → 解析响应体 → 再包回 Promise
-                let resp_val = wasm_bindgen_futures::JsFuture::from(promise).await?;
-                let resp: web_sys::Response = resp_val.dyn_into()?;
-
-                // 读响应体文本（无论 2xx 与否，服务端都返回 JSON）
-                let text_promise = resp
-                    .text()
-                    .map_err(|e| js_sys::Error::new(&format!("读取响应失败: {:?}", e)))?;
-                let text_val = wasm_bindgen_futures::JsFuture::from(text_promise).await?;
-                let text = text_val.as_string().unwrap_or_default();
-
-                // 解析 {success, url, error}
-                let data: serde_json::Value =
-                    serde_json::from_str(&text).unwrap_or(serde_json::Value::Null);
-
-                if data["success"].as_bool() == Some(true) {
-                    let url = data["url"].as_str().unwrap_or("");
-                    if !url.is_empty() {
-                        Ok(js_sys::JsString::from(url).into())
-                    } else {
-                        // success=true 但 url 为空：服务端契约异常，按失败处理
-                        Err(js_sys::Error::new("上传成功但未返回图片地址").into())
-                    }
-                } else {
-                    // 失败：优先用服务端中文 error，兜底用状态码
-                    let msg = data["error"]
-                        .as_str()
-                        .map(|s| s.to_string())
-                        .unwrap_or_else(|| format!("上传失败: {}", resp.status()));
-                    Err(js_sys::Error::new(&msg).into())
-                }
+                upload_image_file(file)
+                    .await
+                    .map(|url| js_sys::JsString::from(url).into())
+                    .map_err(|msg| js_sys::Error::new(&msg).into())
             })
         })
     }
@@ -314,6 +330,6 @@ pub mod wasm {
 
 #[cfg(target_arch = "wasm32")]
 pub use wasm::{
-    consume_upload_event, make_upload_closure, EditorHandle, EditorOptions, UploadEventJs,
-    get_module,
+    consume_upload_event, make_upload_closure, upload_image_file, EditorHandle, EditorOptions,
+    UploadEventJs, get_module,
 };