feat: AI 会话支持按轮保存完整笔记

src/reader/ai-sessions.js

@@ -14,7 +14,6 @@ const GLOBAL_ENTRY_ID = 'system:global-chat';
 const LIMITS = {
   sessionId: 160,
   title: 200,
-  messageText: 20000,
   question: 4000,
   contextText: 12000,
   contextHash: 32,
@@ -252,7 +251,9 @@ function buildMessage(raw, role, lenient) {
   return {
     id: newId('msg'),
     role,
-    text: limitedString(value.text, role === 'user' ? LIMITS.question : LIMITS.messageText),
+    text: role === 'user'
+      ? limitedString(value.text, LIMITS.question)
+      : String(value.text == null ? '' : value.text),
     task: normalizeTask(value.task, lenient),
     contextRef: role === 'user' ? normalizeContextRef(value.contextRef, lenient) : null,
     images: normalizeImages(value.images, lenient),
@@ -807,7 +808,7 @@ function finishAssistant(sessionId, messageId, patch) {
       ? held.message
       : doc.messages.find((item) => item.id === msgId && item.role === 'assistant');
     if (!message) throw new Error('会话消息不存在');
-    message.text = limitedString(value.text == null ? message.text : value.text, LIMITS.messageText);
+    message.text = String(value.text == null ? message.text : value.text);
     if (value.task !== undefined) message.task = normalizeTask(value.task, false);
     if (value.images !== undefined) message.images = normalizeImages(value.images, false);
     if (value.tokensEstimate !== undefined) message.tokensEstimate = count(value.tokensEstimate, 1e9);
@@ -843,7 +844,7 @@ function normalizeBudget(budget) {
   return {
     maxChars: clampInt(value.maxChars, 50, 4000000, LIMITS.contextText),
     maxMessages: clampInt(value.maxMessages, 1, LIMITS.messagesPerSession, 20),
-    maxMessageChars: clampInt(value.maxMessageChars, 50, LIMITS.messageText, LIMITS.question)
+    maxMessageChars: clampInt(value.maxMessageChars, 50, 4000000, LIMITS.question)
   };
 }
 

src/reader/store.js

@@ -11,7 +11,7 @@ const STANDALONE_ENTRY_ID = 'system:standalone-notes';
 const LIMITS = {
   id: 160,
   title: 500,
-  text: 20000,
+  canvasText: 20000,
   quote: 10000,
   context: 20000,
   aiTask: 500,
@@ -24,7 +24,7 @@ const LIMITS = {
   locatorJson: 50000,
   richBlocks: 500,
   richOps: 5000,
-  richJson: 12 * 1024 * 1024,
+  canvasRichJson: 12 * 1024 * 1024,
   richImages: 12,
   richImageBytes: 2 * 1024 * 1024,
   richImageTotalBytes: 8 * 1024 * 1024,
@@ -316,7 +316,6 @@ function normalizeRichContent(input) {
   }
   if (value.ops.length > LIMITS.richOps) throw new Error('富文本笔记内容过多');
   const result = { version: 2, ops: [] };
-  let textLength = 0;
   let imageCount = 0;
   let imageBytes = 0;
   for (const op of value.ops) {
@@ -325,8 +324,6 @@ function normalizeRichContent(input) {
     }
     const attributes = normalizeRichAttributes(op.attributes);
     if (typeof op.insert === 'string') {
-      textLength += op.insert.length;
-      if (textLength > LIMITS.text) throw new Error('富文本笔记文字过多');
       if (op.insert) result.ops.push({
         insert: op.insert,
         ...(attributes ? { attributes } : {})
@@ -349,7 +346,6 @@ function normalizeRichContent(input) {
     }
     result.ops.push({ insert: { image: image.dataUrl } });
   }
-  if (JSON.stringify(result).length > LIMITS.richJson) throw new Error('富文本笔记过大');
   return hasRichContent(result) ? result : null;
 }
 
@@ -359,8 +355,7 @@ function richPlainText(content) {
     .filter((op) => typeof op.insert === 'string')
     .map((op) => op.insert)
     .join('')
-    .replace(/\n$/, '')
-    .slice(0, LIMITS.text);
+    .replace(/\n$/, '');
 }
 
 function hasRichContent(content) {
@@ -431,7 +426,7 @@ function normalizeCanvasObject(value, imageTotals) {
     throw new Error('画布对象线宽无效');
   }
   if (value.canvasKind === 'text'
-    && (typeof value.text !== 'string' || value.text.length > LIMITS.text)) {
+    && (typeof value.text !== 'string' || value.text.length > LIMITS.canvasText)) {
     throw new Error('画布文字无效');
   }
   if ((value.canvasKind === 'pen' || value.canvasKind === 'highlight')
@@ -475,7 +470,7 @@ function normalizeCanvasFlow(value, pageIds, firstPageId) {
     }
     if (typeof op.insert === 'string') {
       textLength += op.insert.length;
-      if (textLength > LIMITS.text) throw new Error('画布全局文本文字过多');
+      if (textLength > LIMITS.canvasText) throw new Error('画布全局文本文字过多');
       const attributes = normalizeRichAttributes(op.attributes);
       if (op.insert) result.ops.push({
         insert: op.insert,
@@ -499,7 +494,7 @@ function normalizeCanvasFlow(value, pageIds, firstPageId) {
     breakIds.add(pageId);
     result.ops.push({ insert: { canvasPageBreak: pageId } });
   }
-  if (JSON.stringify(result).length > LIMITS.richJson) throw new Error('画布全局文本过大');
+  if (JSON.stringify(result).length > LIMITS.canvasRichJson) throw new Error('画布全局文本过大');
   const meaningful = result.ops.some((op) => (
     typeof op.insert === 'string' ? op.insert.trim() : !!op.insert.canvasPageBreak
   ));
@@ -593,14 +588,15 @@ function canvasPlainText(content) {
   return [flowText, objectText]
     .filter((text) => text.trim())
     .join('\n')
-    .slice(0, LIMITS.text);
+    .slice(0, LIMITS.canvasText);
 }
 
 function notePlainText(richContent, canvasContent, fallback) {
-  return [
-    richContent ? richPlainText(richContent) : String(fallback || ''),
+  const text = [
+    richContent ? richPlainText(richContent) : String(fallback == null ? '' : fallback),
     canvasPlainText(canvasContent)
-  ].filter((value) => value.trim()).join('\n').slice(0, LIMITS.text);
+  ].filter((value) => value.trim()).join('\n');
+  return canvasContent ? text.slice(0, LIMITS.canvasText) : text;
 }
 
 function hasCanvasContent(content) {
@@ -1023,7 +1019,7 @@ function noteInput(note, c) {
   if (noteType === 'canvas' && !hasCanvasContent(canvasContent)) {
     throw new Error('画布笔记内容为空');
   }
-  const text = notePlainText(richContent, canvasContent, limitedString(note.text, LIMITS.text));
+  const text = notePlainText(richContent, canvasContent, note.text);
   const quote = limitedString(note.quote, LIMITS.quote);
   if (!text.trim() && !quote.trim()
     && !hasRichContent(richContent) && !hasCanvasContent(canvasContent)) {
@@ -1104,7 +1100,7 @@ function updateNote(id, noteId, patch) {
       else delete note.canvasContent;
     }
     if (Object.prototype.hasOwnProperty.call(patch, 'text')) {
-      fallbackText = limitedString(patch.text, LIMITS.text);
+      fallbackText = String(patch.text == null ? '' : patch.text);
       if (note.noteType !== 'canvas'
         && !Object.prototype.hasOwnProperty.call(patch, 'richContent')) {
         delete note.richContent;