added openrouter ai generated tasks

lib/ai-task-metadata.ts

@@ -0,0 +1,72 @@
+import type { ProfilePreferences } from "@/lib/profile-preferences-storage";
+
+export type AiTaskGenerationMetadata = {
+  aiTasksGeneratedOn: string | null;
+  aiTasksInputHash: string | null;
+};
+
+type StoredProfilePreferences = ProfilePreferences & {
+  aiTasksGeneratedOn?: string;
+  aiTasksInputHash?: string;
+};
+
+export function getAiTaskGenerationMetadata(
+  focusTopics: string | string[] | null | undefined,
+): AiTaskGenerationMetadata {
+  const parsed = parseStoredPreferences(focusTopics);
+
+  return {
+    aiTasksGeneratedOn: parsed.aiTasksGeneratedOn ?? null,
+    aiTasksInputHash: parsed.aiTasksInputHash ?? null,
+  };
+}
+
+export function mergeAiTaskGenerationMetadata(
+  preferences: ProfilePreferences,
+  metadata: AiTaskGenerationMetadata,
+): string {
+  const payload: StoredProfilePreferences = {
+    ...preferences,
+    aiTasksGeneratedOn: metadata.aiTasksGeneratedOn ?? undefined,
+    aiTasksInputHash: metadata.aiTasksInputHash ?? undefined,
+  };
+
+  return JSON.stringify(payload);
+}
+
+function parseStoredPreferences(
+  value: string | string[] | null | undefined,
+): StoredProfilePreferences {
+  const raw = Array.isArray(value) ? (value[0] ?? "") : (value ?? "");
+
+  if (!raw.trim()) {
+    return {
+      focusTopic: "Movement",
+      avatarVibe: "Calm",
+      dailyReminderEnabled: false,
+      dailyReminderTime: "20:00",
+    };
+  }
+
+  try {
+    const parsed = JSON.parse(raw) as StoredProfilePreferences;
+
+    if (parsed && typeof parsed === "object" && !Array.isArray(parsed)) {
+      return parsed;
+    }
+  } catch {
+    return {
+      focusTopic: raw,
+      avatarVibe: "Calm",
+      dailyReminderEnabled: false,
+      dailyReminderTime: "20:00",
+    };
+  }
+
+  return {
+    focusTopic: "Movement",
+    avatarVibe: "Calm",
+    dailyReminderEnabled: false,
+    dailyReminderTime: "20:00",
+  };
+}