write(ui): 三栏宽度可拖拽 + localStorage 持久化

- sidebar | workspace 拖拽条：调整侧栏宽（180-500px）
- editor | preview 拖拽条：调整源码/预览比例（15%-85%）
- CSS var --sidebar-w / --editor-fr / --preview-fr 驱动 grid-template-columns
- 鼠标 down 开始 drag，move 实时算 px/dx，up 落盘 localStorage
- 移动端（<768px）自动隐藏拖拽条，回到 100% 切 tab 模式

Cargo.lock

@@ -56,6 +56,7 @@ checksum = "edca88bc138befd0323b20752846e6587272d3b03b0343c8ea28a6f819e6e71f"
 dependencies = [
  "async-trait",
  "axum-core",
+ "base64",
  "bytes",
  "futures-util",
  "http",
@@ -75,8 +76,10 @@ dependencies = [
  "serde_json",
  "serde_path_to_error",
  "serde_urlencoded",
+ "sha1",
  "sync_wrapper",
  "tokio",
+ "tokio-tungstenite",
  "tower",
  "tower-layer",
  "tower-service",
@@ -116,12 +119,27 @@ version = "2.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4512299f36f043ab09a583e57bceb5a5aab7a73db1805848e8fef3c9e8c78b3"
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5d20789868f4b01b2f2caec9f5c4e0213b41e3e5702a50157d699ae31ced2fcb"
 
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "bytes"
 version = "1.11.1"
@@ -150,6 +168,25 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
+[[package]]
+name = "cpufeatures"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "crypto-common"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "cube"
 version = "0.1.0"
@@ -174,6 +211,22 @@ dependencies = [
  "tracing-subscriber",
 ]
 
+[[package]]
+name = "data-encoding"
+version = "2.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4ae5f15dda3c708c0ade84bfee31ccab44a3da4f88015ed22f63732abe300c8"
+
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
 [[package]]
 name = "displaydoc"
 version = "0.2.5"
@@ -319,6 +372,16 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.17"
@@ -882,7 +945,7 @@ dependencies = [
  "rustc-hash",
  "rustls",
  "socket2",
- "thiserror",
+ "thiserror 2.0.18",
  "tokio",
  "tracing",
  "web-time",
@@ -897,13 +960,13 @@ dependencies = [
  "bytes",
  "getrandom 0.3.4",
  "lru-slab",
- "rand",
+ "rand 0.9.4",
  "ring",
  "rustc-hash",
  "rustls",
  "rustls-pki-types",
  "slab",
- "thiserror",
+ "thiserror 2.0.18",
  "tinyvec",
  "tracing",
  "web-time",
@@ -938,14 +1001,35 @@ version = "5.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
 
+[[package]]
+name = "rand"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ca0ecfa931c29007047d1bc58e623ab12e5590e8c7cc53200d5202b69266d8a"
+dependencies = [
+ "libc",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.4",
+]
+
 [[package]]
 name = "rand"
 version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44c5af06bb1b7d3216d91932aed5265164bf384dc89cd6ba05cf59a35f5f76ea"
 dependencies = [
- "rand_chacha",
- "rand_core",
+ "rand_chacha 0.9.0",
+ "rand_core 0.9.5",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.6.4",
 ]
 
 [[package]]
@@ -955,7 +1039,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.9.5",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom 0.2.17",
 ]
 
 [[package]]
@@ -1188,6 +1281,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sha1"
+version = "0.10.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3bf829a2d51ab4a5ddf1352d8470c140cadc8301b2ae1789db023f01cedd6ba"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
 [[package]]
 name = "sharded-slab"
 version = "0.1.7"
@@ -1297,13 +1401,33 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "thiserror"
+version = "1.0.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
+dependencies = [
+ "thiserror-impl 1.0.69",
+]
+
 [[package]]
 name = "thiserror"
 version = "2.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4288b5bcbc7920c07a1149a35cf9590a2aa808e0bc1eafaade0b80947865fbc4"
 dependencies = [
- "thiserror-impl",
+ "thiserror-impl 2.0.18",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
 ]
 
 [[package]]
@@ -1400,6 +1524,18 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-tungstenite"
+version = "0.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edc5f74e248dc973e0dbb7b74c7e0d6fcc301c694ff50049504004ef4d0cdcd9"
+dependencies = [
+ "futures-util",
+ "log",
+ "tokio",
+ "tungstenite",
+]
+
 [[package]]
 name = "tokio-util"
 version = "0.7.18"
@@ -1550,6 +1686,30 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
+[[package]]
+name = "tungstenite"
+version = "0.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18e5b8366ee7a95b16d32197d0b2604b43a0be89dc5fac9f8e96ccafbaedda8a"
+dependencies = [
+ "byteorder",
+ "bytes",
+ "data-encoding",
+ "http",
+ "httparse",
+ "log",
+ "rand 0.8.6",
+ "sha1",
+ "thiserror 1.0.69",
+ "utf-8",
+]
+
+[[package]]
+name = "typenum"
+version = "1.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40ce102ab67701b8526c123c1bab5cbe42d7040ccfd0f64af1a385808d2f43de"
+
 [[package]]
 name = "unicase"
 version = "2.9.0"
@@ -1580,6 +1740,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "utf-8"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
+
 [[package]]
 name = "utf8_iter"
 version = "1.0.4"
@@ -1901,6 +2067,27 @@ version = "0.57.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ebf944e87a7c253233ad6766e082e3cd714b5d03812acc24c318f549614536e"
 
+[[package]]
+name = "write"
+version = "0.1.0"
+dependencies = [
+ "axum",
+ "cube-core",
+ "futures",
+ "futures-util",
+ "reqwest",
+ "rusqlite",
+ "serde",
+ "serde_json",
+ "tokio",
+ "tokio-stream",
+ "tokio-tungstenite",
+ "tower",
+ "tower-http",
+ "tracing",
+ "url",
+]
+
 [[package]]
 name = "writeable"
 version = "0.6.3"

Cargo.toml

@@ -10,6 +10,7 @@ members = [
     "apps/karaoke",
     "apps/notes",
     "apps/llm-proxy",
+    "apps/write",
 ]
 
 [workspace.package]

apps/write/frontend/src/App.vue

@@ -14,6 +14,62 @@ const statusErr = ref(false)
 const busy = ref(false)
 const recording = ref(false)
 
+onMounted(() => applyLayoutVars())
+
+// ====== 拖拽布局：sidebar 宽（px） + editor/preview 比例（0-1）======
+const sidebarW = ref(parseInt(localStorage.getItem('write.sidebarW') || '260'))
+const editorRatio = ref(parseFloat(localStorage.getItem('write.editorRatio') || '0.5'))
+
+function applyLayoutVars(): void {
+  const r = document.documentElement
+  r.style.setProperty('--sidebar-w', sidebarW.value + 'px')
+  r.style.setProperty('--editor-fr', editorRatio.value + 'fr')
+  r.style.setProperty('--preview-fr', (1 - editorRatio.value) + 'fr')
+}
+
+let dragKind: 'sidebar' | 'editor' | null = null
+let dragStartX = 0
+let dragStartVal = 0
+let dragPaneW = 0
+
+function startDrag(e: MouseEvent, kind: 'sidebar' | 'editor'): void {
+  dragKind = kind
+  dragStartX = e.clientX
+  if (kind === 'sidebar') {
+    dragStartVal = sidebarW.value
+  } else {
+    dragStartVal = editorRatio.value
+    const pane = (e.currentTarget as HTMLElement).parentElement
+    dragPaneW = pane ? pane.offsetWidth : window.innerWidth
+  }
+  document.body.style.cursor = 'col-resize'
+  document.body.style.userSelect = 'none'
+  window.addEventListener('mousemove', onDrag)
+  window.addEventListener('mouseup', endDrag)
+  e.preventDefault()
+}
+function onDrag(e: MouseEvent): void {
+  if (!dragKind) return
+  const dx = e.clientX - dragStartX
+  if (dragKind === 'sidebar') {
+    sidebarW.value = Math.max(180, Math.min(500, dragStartVal + dx))
+  } else {
+    const newR = dragStartVal + dx / Math.max(1, dragPaneW)
+    editorRatio.value = Math.max(0.15, Math.min(0.85, newR))
+  }
+  applyLayoutVars()
+}
+function endDrag(): void {
+  if (!dragKind) return
+  localStorage.setItem('write.sidebarW', String(sidebarW.value))
+  localStorage.setItem('write.editorRatio', String(editorRatio.value))
+  dragKind = null
+  document.body.style.cursor = ''
+  document.body.style.userSelect = ''
+  window.removeEventListener('mousemove', onDrag)
+  window.removeEventListener('mouseup', endDrag)
+}
+
 const needToken = ref(!getToken())
 const tokenInput = ref('')
 
@@ -218,6 +274,8 @@ onMounted(() => {
 
     <div class="sidebar-backdrop" @click="drawerOpen = false"></div>
 
+    <div class="splitter splitter-main" @mousedown="startDrag($event, 'sidebar')" title="拖动调整侧栏宽度"></div>
+
     <aside class="sidebar">
       <div class="sidebar-header">
         <h1>✍ write</h1>
@@ -256,6 +314,7 @@ onMounted(() => {
             :disabled="activeId === null"
           ></textarea>
         </div>
+        <div class="splitter splitter-editor" @mousedown="startDrag($event, 'editor')" title="拖动调整源码/预览比例"></div>
         <div class="preview" v-html="renderedPreview"></div>
       </div>
 

apps/write/frontend/src/styles.css

@@ -16,7 +16,7 @@ textarea, input { font: inherit; }
 
 .app {
   display: grid;
-  grid-template-columns: 260px 1fr;
+  grid-template-columns: var(--sidebar-w, 260px) 6px 1fr;
   height: 100vh;
 }
 
@@ -92,11 +92,25 @@ textarea, input { font: inherit; }
 
 .editor-pane {
   display: grid;
-  grid-template-columns: 1fr 1fr;
+  grid-template-columns: var(--editor-fr, 1fr) 6px var(--preview-fr, 1fr);
   min-height: 0;
   border-bottom: 1px solid #e5e5e5;
 }
 
+/* 拖拽分隔条 */
+.splitter {
+  background: #e5e5e5;
+  cursor: col-resize;
+  transition: background 0.12s;
+  user-select: none;
+}
+.splitter:hover { background: #b0c5ff; }
+.splitter-main { /* sidebar | workspace */ }
+.splitter-editor { /* editor | preview */ }
+@media (max-width: 768px) {
+  .splitter { display: none; }
+}
+
 .title-row {
   grid-column: 1 / -1;
   padding: 10px 16px;