feat: add persistent document handling and protect note drafts

Add HTTP PaddleOCR-VL settings and shared document previews for chat and knowledge imports. Preserve attachment originals and parsed assets across drafts, messages and queues; support explicit image OCR, selecting document images into a conversation draft, and restoring queued input for editing.

Protect unsaved note bodies and titles during navigation and asynchronous updates. Match canvas analysis to source revisions, invalidate affected comments, preserve annotations during pagination, and provide a resizable record index with saved width preferences.

Existing OCR settings retain local behavior. Historical attachments without saved originals are not reconstructed. Advanced OCR options depend on the configured service; image sending depends on the effective model and Runtime.

Validation: full typecheck and lint passed; 477 focused tests passed across 12 files; staged whitespace checks passed. The full repository suite was not rerun for this commit.

Release note: Keep note drafts safe while switching workspaces, resize the record index, and revisit saved document attachments with OCR previews and selected images in chat.

src/shared/contracts.ts

@@ -1,4 +1,5 @@
 import { z } from 'zod'
+import { maximumAttachmentsPerMessage, maximumContextBytes } from './attachment-limits'
 import {
   modelRequestBodySchema,
   modelRequestHeadersSchema,
@@ -346,7 +347,7 @@ export const agentRequestSchema = z
       .max(20)
       .default([]),
     knowledgeRetrievalMode: knowledgeRetrievalModeSchema.default('auto'),
-    contextIds: z.array(z.string().uuid()).max(8).optional(),
+    contextIds: z.array(z.string().uuid()).max(maximumAttachmentsPerMessage).optional(),
     imageContextArtifactIds: z.array(assistantIdSchema).max(8).optional(),
     history: z
       .array(conversationHistoryMessageSchema)
@@ -388,7 +389,7 @@ export const conversationQueueUserInputSchema = z
     workMode: legacyWorkModeSchema,
     includeMemoryContext: z.boolean().default(true),
     prompt: z.string().trim().min(1).max(100_000),
-    attachments: z.array(conversationAttachmentSchema).max(8).default([]),
+    attachments: z.array(conversationAttachmentSchema).max(maximumAttachmentsPerMessage).default([]),
     imageContextArtifactIds: z.array(assistantIdSchema).max(8).optional(),
     knowledgeLibraryIds: z
       .array(z.string().uuid())
@@ -1138,17 +1139,19 @@ export type RuntimeSettings = {
 export type ContextAttachment = ConversationAttachment
 
 export type ContextFileSelectionProgress = {
-  phase: 'reading' | 'parsing'
+  phase: 'reading' | 'parsing' | 'saving'
+  operationId?: string
   fileName: string
   fileNumber: number
   fileCount: number
 }
 
-export const maximumPastedImageBytes = 12 * 1024 * 1024
+export const maximumPastedImageBytes = maximumContextBytes
 
 export const clipboardTextSchema = z.string()
 
 export const contextImportFilesSchema = z.object({
+  conversationId: z.string().uuid().optional(),
   paths: z.array(z.string().min(1).max(32768)).min(1).max(8)
 }).strict()
 
@@ -1670,6 +1673,7 @@ export type KnowledgeSourceItem = {
 }
 
 export type KnowledgeDocumentItem = {
+  resultId?: string
   id: string
   libraryId: string
   sourceId?: string
@@ -1765,7 +1769,7 @@ export type DesktopApi = {
     onBeforeQuit: (listener: () => Promise<void>) => () => void
     clearLocalData: () => Promise<void>
     onNewConversation: (listener: () => void) => () => void
-    onOpenSettings: (listener: () => void) => () => void
+    onOpenSettings: (listener: (category?: 'model' | 'document-parsing') => void) => () => void
   }
   clipboard: {
     readText: () => Promise<string>
@@ -1998,13 +2002,20 @@ export type DesktopApi = {
     removeModel: (modelId: string) => Promise<EmbeddingModelSnapshot>
   }
   documentParsing?: {
+    getResult: (id: string) => Promise<import('./document-result-contracts').DocumentResult>
+    readResultImage: (id: string, imageId: string, thumbnail?: boolean) => Promise<string>
+    openResultOriginal: (id: string) => Promise<void>
+    releaseResult: (id: string) => Promise<void>
+    cancelTest: (operationId: string) => Promise<void>
+    checkHttp: () => Promise<{ checkedAt: string; declaredOptions: string[] }>
     getSnapshot: () => Promise<DocumentParsingSnapshot>
     getOcrModelProgress: () => Promise<DocumentOcrModelProgressSnapshot>
     update: (
-      input: DocumentParsingSettings
+      input: DocumentParsingSettings & { apiKey?: string; clearApiKey?: boolean }
     ) => Promise<DocumentParsingSnapshot>
     test: (
-      purpose: DocumentParsingTestPurpose
+      purpose: DocumentParsingTestPurpose,
+      operationId?: string
     ) => Promise<DocumentParsingDiagnostic | undefined>
     installOcrModel: (
       modelId: string,
@@ -2077,6 +2088,8 @@ export type DesktopApi = {
     ) => () => void
   }
   conversationQueue: {
+    getAttachments: (itemId: string) => Promise<ContextAttachment[]>
+    restoreToDraft: (itemId: string, draftText: string) => Promise<{ conversationId: string; prompt: string; attachments: ContextAttachment[] }>
     list: (conversationId?: string) => Promise<ConversationQueueItem[]>
     enqueueUser: (
       input: ConversationQueueUserInput
@@ -2248,9 +2261,23 @@ export type DesktopApi = {
     ) => Promise<RuntimeNativeSnapshot>
   }
   context: {
-    selectFiles: () => Promise<ContextAttachment[]>
+    imageCapability: (conversationId: string, runtimeSelection?: AgentRuntimeSelection) => Promise<{ supported: boolean; reason?: string }>
+    copyToDraft: (conversationId: string, id: string, operationId: string) => Promise<ContextAttachment[]>
+    pendingParsing: (conversationId: string) => Promise<ContextAttachment[]>
+    retryParsing: (conversationId: string, id: string, operationId: string) => Promise<ContextAttachment[]>
+    dismissParsing: (conversationId: string, id: string) => Promise<void>
+    cancelImport: (operationId?: string) => Promise<void>
+    reparseDraft: (conversationId: string, id: string, operationId: string) => Promise<ContextAttachment[]>
+    cancelParsing: (operationId: string) => Promise<void>
+    sendOriginal: (conversationId: string, id: string) => Promise<ContextAttachment[]>
+    openOriginal: (id: string) => Promise<void>
+    addResultImages: (conversationId: string, resultId: string, imageIds: string[]) => Promise<ContextAttachment[]>
+    onDraftChanged: (listener: (conversationId: string, attachments: ContextAttachment[]) => void) => () => void
+    getDraft: (conversationId: string) => Promise<ContextAttachment[]>
+    saveDraft: (conversationId: string, ids: string[]) => Promise<void>
+    selectFiles: (conversationId?: string) => Promise<ContextAttachment[]>
     getFilePath: (file: File) => string
-    importFiles: (paths: string[]) => Promise<ContextAttachment[]>
+    importFiles: (paths: string[], conversationId?: string) => Promise<ContextAttachment[]>
     onFileSelectionProgress: (
       listener: (progress: ContextFileSelectionProgress) => void
     ) => () => void
@@ -2278,7 +2305,7 @@ export type DesktopApi = {
     removeEntry: (entryId: string) => Promise<MagicNoteDetail>
     analyze: (
       entryId: string,
-      options: MagicNoteAnalysisOptions
+      options: import('./magic-notes-contracts').MagicNoteEntryAnalysisOptions
     ) => Promise<MagicNoteDetail>
     analyzeDraft: (
       content: MagicNoteContent,
@@ -2291,7 +2318,7 @@ export type DesktopApi = {
     ) => Promise<MagicTodoUpdateResult>
     analyzeTodo: (
       todoId: string,
-      options: MagicNoteAnalysisOptions
+      options: import('./magic-notes-contracts').MagicTodoAnalysisOptions
     ) => Promise<MagicTodoItem>
     onAnalysisEvent: (
       listener: (event: MagicNoteAnalysisStreamEvent) => void