Add green-bean inventory and cupping features

Ports inventory management and SCA-style cupping scoring from
hope_roaster: lot tracking with audit-logged consumption, cupping
sessions with server-authoritative scoring and a live radar chart,
and links from the planner (draw-from-lot, open-cupping-session).

Also fixes the Blend/Single-origin toggle layout, replaces tooltips
with an in-context "why" teaching layer, and stages the planner UI
into pre-roast vs. post-roast phases.

package-lock.json

@@ -11,6 +11,7 @@
         "@earendil-works/pi-coding-agent": "^0.83.0",
         "bcryptjs": "^3.0.3",
         "express": "^5.0.1",
+        "nodemailer": "^9.0.3",
         "pg": "^8.22.0"
       },
       "devDependencies": {
@@ -2745,6 +2746,15 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/nodemailer": {
+      "version": "9.0.3",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-9.0.3.tgz",
+      "integrity": "sha512-n+YP+NKwR5zRWa60k3GiQ6Q3B4KXCoAw40dAKeCtYn020iNN74aWK2liXIC3ZEATeGql7we3tE3t8QwhY0eskw==",
+      "license": "MIT-0",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/object-hash": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/object-hash/-/object-hash-2.2.0.tgz",