refactor: rename nutriphi module to food (Essen)

Complete rename across the entire monorepo pre-launch:
- Module, routes, API, i18n, standalone landing app directories
- All code identifiers, display names, logo component
- German user-facing label: "Essen" (English brand stays "Food")
- Dexie table nutriFavorites -> foodFavorites
- Infra configs (docker-compose, cloudflared, nginx, wrangler)

Zero residue of nutriphi remains. No data migration needed (pre-launch).

Follow-up: run pnpm install, update Cloudflare DNS
(food.mana.how), rename Cloudflare Pages project.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker/grafana/dashboards/master-overview.json

@@ -616,8 +616,8 @@
 						"type": "prometheus",
 						"uid": "${datasource}"
 					},
-					"expr": "up{job=\"nutriphi-backend\"}",
-					"legendFormat": "NutriPhi",
+					"expr": "up{job=\"food-backend\"}",
+					"legendFormat": "Food",
 					"refId": "L"
 				},
 				{

docker/grafana/dashboards/system-overview.json

@@ -585,8 +585,8 @@
 				},
 				{
 					"datasource": { "type": "prometheus", "uid": "${datasource}" },
-					"expr": "up{job=\"nutriphi-backend\"}",
-					"legendFormat": "NutriPhi",
+					"expr": "up{job=\"food-backend\"}",
+					"legendFormat": "Food",
 					"refId": "L"
 				},
 				{

docker/nginx/landings.conf

@@ -80,11 +80,11 @@ server {
     include /etc/nginx/snippets/landing-common.conf;
 }
 
-# nutriphi.mana.how — NutriPhi Landing
+# food.mana.how — Food Landing
 server {
     listen 80;
-    server_name nutriphi.mana.how;
-    root /srv/landings/nutriphi;
+    server_name food.mana.how;
+    root /srv/landings/food;
     index index.html;
     include /etc/nginx/snippets/landing-common.conf;
 }

docker/prometheus/prometheus.yml

@@ -99,7 +99,7 @@ scrape_configs:
     scrape_interval: 30s
 
   # NOTE: Individual app backends (chat, todo, calendar, contacts, storage,
-  # nutriphi, music, plants, picture) have been REMOVED — all migrated to
+  # food, music, plants, picture) have been REMOVED — all migrated to
   # local-first architecture. Only uload-server and memoro-server remain.
 
   # Mana LLM Gateway (Ollama + Google Fallback)
@@ -226,7 +226,7 @@ scrape_configs:
           - https://mana.how/picture
           - https://mana.how/storage
           - https://mana.how/presi
-          - https://mana.how/nutriphi
+          - https://mana.how/food
           - https://mana.how/plants
           - https://mana.how/calc
           - https://mana.how/zitare