feat: nutrition trend/history view (v0.69.0)

Extends GET /api/v1/users/me/nutrition-diary with a `range` query
param (7/30/90) that switches it into trend mode -- daily
calorie/macro totals bucketed from the same cooking-history rows the
single-day diary already reads, with zero-filled days so the chart
has a continuous x-axis. New NutritionTrend component reuses the
existing hand-rolled TimeSeriesChart (previously admin-only, now
imported from user-facing code too) for the calorie line, plus
simple average-macro stat tiles below it.

Nutrition page now has Diary/Trend tabs instead of just the diary.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/app/(app)/nutrition/page.tsx

@@ -2,6 +2,8 @@ import type { Metadata } from "next";
 import { headers } from "next/headers";
 import { auth } from "@/lib/auth/server";
 import { NutritionDiary } from "@/components/nutrition/nutrition-diary";
+import { NutritionTrend } from "@/components/nutrition/nutrition-trend";
+import { Tabs, TabsList, TabsTrigger, TabsContent } from "@/components/ui/tabs";
 import { getMessages } from "@/lib/i18n/server";
 
 export const metadata: Metadata = {};
@@ -17,7 +19,18 @@ export default async function NutritionDiaryPage() {
         <h1 className="text-2xl font-bold tracking-tight">{m.nutritionDiary.title}</h1>
         <p className="text-muted-foreground mt-1">{m.nutritionDiary.subtitle}</p>
       </div>
-      <NutritionDiary />
+      <Tabs defaultValue="diary" className="gap-6">
+        <TabsList>
+          <TabsTrigger value="diary">{m.nutritionDiary.tabDiary}</TabsTrigger>
+          <TabsTrigger value="trend">{m.nutritionDiary.tabTrend}</TabsTrigger>
+        </TabsList>
+        <TabsContent value="diary">
+          <NutritionDiary />
+        </TabsContent>
+        <TabsContent value="trend">
+          <NutritionTrend />
+        </TabsContent>
+      </Tabs>
     </div>
   );
 }