feat(server): scenario mapping (#13404)

fix AI-404

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

* **New Features**
* Introduced scenario-based configuration for copilot, allowing default
model assignments for various AI use cases.
  * Added a new image generation model to the available options.

* **Improvements**
* Refined copilot provider settings by removing deprecated fallback
options and standardizing base URL configuration.
* Enhanced prompt management to support scenario-driven updates and
improved configuration handling.
* Updated admin and settings interfaces to support new scenario
configurations.

* **Bug Fixes**
* Removed deprecated or unused prompts and related references across
platforms for consistency.

* **Other**
* Improved test coverage and updated test assets to reflect prompt and
scenario changes.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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

@@ -45,13 +45,7 @@ export const DEFAULT_DIMENSIONS = 256;
 
 export type OpenAIConfig = {
   apiKey: string;
-  baseUrl?: string;
-  fallback?: {
-    text?: string;
-    structured?: string;
-    image?: string;
-    embedding?: string;
-  };
+  baseURL?: string;
 };
 
 const ModelListSchema = z.object({
@@ -249,7 +243,7 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
     super.setup();
     this.#instance = createOpenAI({
       apiKey: this.config.apiKey,
-      baseURL: this.config.baseUrl,
+      baseURL: this.config.baseURL,
     });
   }
 
@@ -283,7 +277,7 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
 
   override async refreshOnlineModels() {
     try {
-      const baseUrl = this.config.baseUrl || 'https://api.openai.com/v1';
+      const baseUrl = this.config.baseURL || 'https://api.openai.com/v1';
       if (baseUrl && !this.onlineModelList.length) {
         const { data } = await fetch(`${baseUrl}/models`, {
           headers: {
@@ -320,7 +314,6 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
     const fullCond = {
       ...cond,
       outputType: ModelOutputType.Text,
-      fallbackModel: this.config.fallback?.text,
     };
     await this.checkParams({ messages, cond: fullCond, options });
     const model = this.selectModel(fullCond);
@@ -361,7 +354,6 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
     const fullCond = {
       ...cond,
       outputType: ModelOutputType.Text,
-      fallbackModel: this.config.fallback?.text,
     };
     await this.checkParams({ messages, cond: fullCond, options });
     const model = this.selectModel(fullCond);
@@ -407,11 +399,7 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
     messages: PromptMessage[],
     options: CopilotChatOptions = {}
   ): AsyncIterable<StreamObject> {
-    const fullCond = {
-      ...cond,
-      outputType: ModelOutputType.Object,
-      fallbackModel: this.config.fallback?.text,
-    };
+    const fullCond = { ...cond, outputType: ModelOutputType.Object };
     await this.checkParams({ cond: fullCond, messages, options });
     const model = this.selectModel(fullCond);
 
@@ -444,11 +432,7 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
     messages: PromptMessage[],
     options: CopilotStructuredOptions = {}
   ): Promise<string> {
-    const fullCond = {
-      ...cond,
-      outputType: ModelOutputType.Structured,
-      fallbackModel: this.config.fallback?.structured,
-    };
+    const fullCond = { ...cond, outputType: ModelOutputType.Structured };
     await this.checkParams({ messages, cond: fullCond, options });
     const model = this.selectModel(fullCond);
 
@@ -488,11 +472,7 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
     chunkMessages: PromptMessage[][],
     options: CopilotChatOptions = {}
   ): Promise<number[]> {
-    const fullCond = {
-      ...cond,
-      outputType: ModelOutputType.Text,
-      fallbackModel: this.config.fallback?.text,
-    };
+    const fullCond = { ...cond, outputType: ModelOutputType.Text };
     await this.checkParams({ messages: [], cond: fullCond, options });
     const model = this.selectModel(fullCond);
     // get the log probability of "yes"/"no"
@@ -605,7 +585,7 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
       );
     }
 
-    const url = `${this.config.baseUrl || 'https://api.openai.com'}/v1/images/edits`;
+    const url = `${this.config.baseURL || 'https://api.openai.com/v1'}/images/edits`;
     const res = await fetch(url, {
       method: 'POST',
       headers: { Authorization: `Bearer ${this.config.apiKey}` },
@@ -637,11 +617,7 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
     messages: PromptMessage[],
     options: CopilotImageOptions = {}
   ) {
-    const fullCond = {
-      ...cond,
-      outputType: ModelOutputType.Image,
-      fallbackModel: this.config.fallback?.image,
-    };
+    const fullCond = { ...cond, outputType: ModelOutputType.Image };
     await this.checkParams({ messages, cond: fullCond, options });
     const model = this.selectModel(fullCond);
 
@@ -691,11 +667,7 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
     options: CopilotEmbeddingOptions = { dimensions: DEFAULT_DIMENSIONS }
   ): Promise<number[][]> {
     messages = Array.isArray(messages) ? messages : [messages];
-    const fullCond = {
-      ...cond,
-      outputType: ModelOutputType.Embedding,
-      fallbackModel: this.config.fallback?.embedding,
-    };
+    const fullCond = { ...cond, outputType: ModelOutputType.Embedding };
     await this.checkParams({ embeddings: messages, cond: fullCond, options });
     const model = this.selectModel(fullCond);