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.

db/migrations/003_inventory_cupping.sql

@@ -0,0 +1,45 @@
+-- Additive only: existing tables, rows, and columns are untouched.
+CREATE TABLE green_bean_lots (
+  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  user_id uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  origin text NOT NULL,
+  variety text NOT NULL DEFAULT '',
+  process text NOT NULL DEFAULT '',
+  producer text NOT NULL DEFAULT '',
+  purchase_date date,
+  initial_weight_g numeric NOT NULL,
+  remaining_weight_g numeric NOT NULL,
+  cost_total numeric,
+  moisture_pct numeric,
+  density_g_l numeric,
+  notes text NOT NULL DEFAULT '',
+  archived boolean NOT NULL DEFAULT false,
+  created_at timestamptz NOT NULL DEFAULT now(),
+  updated_at timestamptz NOT NULL DEFAULT now()
+);
+CREATE TABLE bean_consumption (
+  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  lot_id uuid NOT NULL REFERENCES green_bean_lots(id) ON DELETE CASCADE,
+  user_id uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  roast_plan_id uuid REFERENCES roast_plans(id) ON DELETE SET NULL,
+  weight_g numeric NOT NULL CHECK (weight_g > 0),
+  created_at timestamptz NOT NULL DEFAULT now()
+);
+-- One draw-down per roast plan, ever (NULLs are distinct in Postgres, so plan-less manual
+-- entries remain unlimited). This is the server-side backstop that makes the client's
+-- "Draw from lot" button idempotent even if clicked twice or from two devices.
+CREATE UNIQUE INDEX bean_consumption_one_per_plan ON bean_consumption(roast_plan_id);
+CREATE TABLE cupping_sessions (
+  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  user_id uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  roast_plan_id uuid REFERENCES roast_plans(id) ON DELETE SET NULL,
+  data jsonb NOT NULL,
+  total_score numeric NOT NULL DEFAULT 0,
+  created_at timestamptz NOT NULL DEFAULT now(),
+  updated_at timestamptz NOT NULL DEFAULT now()
+);
+CREATE INDEX green_bean_lots_user ON green_bean_lots(user_id, archived, purchase_date DESC);
+CREATE INDEX bean_consumption_lot ON bean_consumption(lot_id, created_at DESC);
+CREATE INDEX bean_consumption_user ON bean_consumption(user_id);
+CREATE INDEX cupping_sessions_user ON cupping_sessions(user_id, updated_at DESC);
+CREATE INDEX cupping_sessions_plan ON cupping_sessions(roast_plan_id);