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/messages/en.json

@@ -686,7 +686,12 @@
     "noEntries": "Nothing logged for this day. Mark a recipe as \"cooked\" to see it here.",
     "servingsLabel": "{count, plural, one {1 serving} other {{count} servings}}",
     "nutritionUnknownBadge": "Nutrition unknown",
-    "unknownNote": "{count, plural, one {1 entry has no nutrition data and isn't included in the totals above.} other {{count} entries have no nutrition data and aren't included in the totals above.}}"
+    "unknownNote": "{count, plural, one {1 entry has no nutrition data and isn't included in the totals above.} other {{count} entries have no nutrition data and aren't included in the totals above.}}",
+    "tabDiary": "Diary",
+    "tabTrend": "Trend",
+    "trendCaloriesTitle": "Calories over time",
+    "trendRangeDays": "{count} days",
+    "trendDailyAvg": "avg {value}/day"
   },
   "explore": {
     "title": "Explore",