rework app shell, strip coach hooks, wire barcode flow

rename state vars throughout, add barcode scanner trigger and draft flow,
drop coach navigation and session, add ForecastPoint type

src/types.ts

@@ -34,6 +34,57 @@ export type EntryDraft = Omit<
   source?: RedBullEntry["source"];
 };
 
+export type BarcodeFormatName = "ean-13" | "ean-8" | "upc-a" | "upc-e" | "unknown";
+
+export type BarcodeProductDraft = {
+  flavourName: string;
+  sizeMl: number;
+  pricePerCan: number;
+  sugarFree?: boolean;
+  caffeineMgPerCan?: number;
+};
+
+export type ResolvedBarcodeProduct = BarcodeProductDraft & {
+  flavourAccent: string;
+  source: "built-in" | "user";
+};
+
+export type BarcodeSeedProduct = BarcodeProductDraft & {
+  verifiedBy: string;
+  sourceName?: string;
+  sourceUrl?: string;
+  notes?: string;
+  variant?: string;
+};
+
+export type UserBarcodeMapping = BarcodeProductDraft & {
+  barcode: string;
+  createdAt: string;
+  updatedAt: string;
+};
+
+export type BarcodeLookupCatalog = {
+  verifiedProducts?: Record<string, BarcodeSeedProduct>;
+  userMappings?: UserBarcodeMapping[];
+};
+
+export type BarcodeLookupResult =
+  | {
+      status: "known" | "user";
+      barcode: string;
+      product: ResolvedBarcodeProduct;
+    }
+  | {
+      status: "partial";
+      barcode: string;
+      product: BarcodeProductDraft;
+      reason: string;
+    }
+  | {
+      status: "unknown";
+      barcode: string;
+    };
+
 export type Filters = {
   flavour: string;
   dateRange: DateFilter;
@@ -55,22 +106,19 @@ export type ImportPreview = {
   rows: ImportPreviewRow[];
 };
 
-export type ChatRole = "user" | "assistant";
-
-export type CoachMessage = {
-  id: string;
-  role: ChatRole;
-  content: string;
-  thinking?: string;
-  pending?: boolean;
-  stopped?: boolean;
+export type UserLimits = {
+  dailyCanLimit?: number;
+  dailySpendLimit?: number;
+  stopTime?: string;
 };
 
-export type CoachChat = {
-  id: string;
-  userId: string;
-  title: string;
-  messages: CoachMessage[];
-  createdAt: string;
-  updatedAt: string;
+export type LimitViolation = "cans" | "spend" | "stopTime";
+
+export type LimitCheckResult = {
+  violations: LimitViolation[];
+  projectedCans: number;
+  projectedSpend: number;
+  todayCans: number;
+  todaySpend: number;
+  pastStopTime: boolean;
 };