Bug 1926933 - Add Copilot to list of chatbot providers r=ngrato

Add entry alphabetically to providers list.

Differential Revision: https://phabricator.services.mozilla.com/D226819

Author: Mardak

browser/components/genai/GenAI.sys.mjs

@@ -75,7 +75,7 @@ XPCOMUtils.defineLazyPreferenceGetter(
   lazy,
   "chatProviders",
   "browser.ml.chat.providers",
-  "claude,chatgpt,gemini,lechat",
+  "claude,chatgpt,copilot,gemini,lechat",
   reorderChatProviders
 );
 XPCOMUtils.defineLazyPreferenceGetter(
@@ -162,7 +162,7 @@ export const GenAI = {
       },
     ],
     [
-      "https://copilot.microsoft.com",
+      "https://copilot.microsoft.com/?form=MOZCMC",
       {
         choiceIds: [
           "genai-onboarding-copilot-generate",
@@ -1101,9 +1101,6 @@ export const GenAI = {
       source: context.entry,
     });
 
-    await this.prepareChatPromptPrefix();
-    const prompt = this.buildChatPrompt(promptObj, context);
-
     // If no provider is configured, open sidebar and wait once for onboarding
     const { SidebarController } = context.window;
 
@@ -1115,6 +1112,10 @@ export const GenAI = {
       }
     }
 
+    // Build prompt after provider is confirmed to use correct length limits
+    await this.prepareChatPromptPrefix();
+    const prompt = this.buildChatPrompt(promptObj, context);
+
     // Pass the prompt via GET url ?q= param or request header
     const { header, queryParam = "q" } =
       this.chatProviders.get(lazy.chatProvider) ?? {};

browser/components/genai/tests/browser/browser_chat_sidebar.js

@@ -76,7 +76,7 @@ add_task(async function test_sidebar_providers() {
   await SidebarController.show("viewGenaiChatSidebar");
 
   const origCount = countVisible();
-  Assert.equal(origCount, 4, "Rendered expected number of provider options");
+  Assert.equal(origCount, 5, "Rendered expected number of provider options");
 
   SidebarController.hide();
   await SpecialPowers.pushPrefEnv({