feat: Migrate Chrome AI integration to a separate module

src/models/utils/chrome.ts

@@ -0,0 +1,54 @@
+
+export const checkChromeAIAvailability = async (): Promise<"readily" | "no" | "after-download"> => {
+    try {
+        const ai = (window as any).ai;
+
+        // upcoming version change 
+        if (ai?.assistant?.capabilities) {
+            const capabilities = await ai.assistant.capabilities();
+            return capabilities?.available ?? "no";
+        }
+
+        // old version 
+        if (ai?.canCreateTextSession) {
+            const available = await ai.canCreateTextSession();
+            return available ?? "no";
+        }
+
+        return "no";
+    } catch (e) {
+        console.error("Error checking Chrome AI availability:", e);
+        return "no";
+    }
+}
+
+export interface AITextSession {
+    prompt(input: string): Promise<string>
+    promptStreaming(input: string): ReadableStream
+    destroy(): void
+    clone(): AITextSession
+}
+
+
+export const createAITextSession = async (data: any): Promise<AITextSession> => {
+    const ai = (window as any).ai;
+
+    // upcoming version change 
+    if (ai?.assistant?.create) {
+        const session = await ai.assistant.create({
+            ...data
+        })
+        return session
+    }
+
+    // old version
+    if (ai.createTextSession) {
+        const session = await ai.createTextSession({
+            ...data
+        })
+
+        return session
+    }
+
+    throw new Error("Chrome AI is not available.")
+}