feat(shell): home menu + navigation drawer (mockups 02/03)

The app now opens on a main menu instead of straight into the list:
- HomeScreen (mockup 02): sprout logo over a faint seed-glyph watermark, with
  big "Your inventory" (→ /inventory) and "Open market" (Block 2, "coming soon")
  destinations.
- AppDrawer (mockup 03): Inventory is live; the social items (market, profile,
  chat, wishlist, following, settings) are shown disabled with a "coming soon"
  tag so the roadmap is visible. Drawer is available on home and inventory.
- Routing: / → home, /inventory → list, /variety/:id → detail.

Tests: home shows the menu + navigates; drawer opens + navigates. quick-add flow
updated to go home → inventory. 50 green; Linux runs.

apps/app_seeds/lib/i18n/en.i18n.json

@@ -7,7 +7,21 @@
     "cancel": "Cancel",
     "delete": "Delete",
     "edit": "Edit",
-    "type": "Type"
+    "type": "Type",
+    "comingSoon": "Coming soon"
+  },
+  "home": {
+    "openMarket": "Open market",
+    "yourInventory": "Your inventory"
+  },
+  "menu": {
+    "inventory": "Inventory",
+    "market": "Market",
+    "profile": "Your profile",
+    "chat": "Chat",
+    "wishlist": "Wishlist",
+    "following": "Following",
+    "settings": "Settings"
   },
   "inventory": {
     "title": "Inventory",