feat(core): add ai workspace all docs switch (#13345)

Close [AI-397](https://linear.app/affine-design/issue/AI-397)

<img width="272" height="186" alt="截屏2025-07-29 11 54 20"
src="https://github.com/user-attachments/assets/e171fb57-66cf-4244-894d-c27b18cbe83a"
/>


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Introduced an AI tools configuration service, allowing users to
customize AI tool usage (e.g., workspace search, reading docs) in chat
and AI features.
* Added a toggle in chat preferences for enabling or disabling
workspace-wide document search.
* AI chat components now respect user-configured tool settings across
chat, retry, and playground scenarios.

* **Improvements**
* Enhanced chat and AI interfaces to propagate and honor user tool
configuration throughout the frontend and backend.
* Made draft and tool configuration services optional and safely handled
their absence in chat components.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/copilot/providers/types.ts

@@ -57,28 +57,28 @@ export const VertexSchema: JSONSchema = {
 
 // ========== prompt ==========
 
+export const PromptToolsSchema = z
+  .enum([
+    'codeArtifact',
+    'conversationSummary',
+    // work with morph
+    'docEdit',
+    // work with indexer
+    'docRead',
+    'docKeywordSearch',
+    // work with embeddings
+    'docSemanticSearch',
+    // work with exa/model internal tools
+    'webSearch',
+    // artifact tools
+    'docCompose',
+    // section editing
+    'sectionEdit',
+  ])
+  .array();
+
 export const PromptConfigStrictSchema = z.object({
-  tools: z
-    .enum([
-      'codeArtifact',
-      'conversationSummary',
-      // work with morph
-      'docEdit',
-      // work with indexer
-      'docRead',
-      'docKeywordSearch',
-      // work with embeddings
-      'docSemanticSearch',
-      // work with exa/model internal tools
-      'webSearch',
-      // artifact tools
-      'docCompose',
-      // section editing
-      'sectionEdit',
-    ])
-    .array()
-    .nullable()
-    .optional(),
+  tools: PromptToolsSchema.nullable().optional(),
   // params requirements
   requireContent: z.boolean().nullable().optional(),
   requireAttachment: z.boolean().nullable().optional(),
@@ -107,6 +107,8 @@ export const PromptConfigSchema =
 
 export type PromptConfig = z.infer<typeof PromptConfigSchema>;
 
+export type PromptTools = z.infer<typeof PromptToolsSchema>;
+
 // ========== message ==========
 
 export const EmbeddingMessage = z.array(z.string().trim().min(1)).min(1);