docs(docs): update docs to get rid of gopls warnings. update some code to newer standards

* feat(tui): remake parts of the tui

* chore(tui): remove unused newViewport helper

.gitignore

@@ -7,6 +7,7 @@
 
 docs/sca-psd2-compliance.md
 accept-a-payment/
+codemap/
 
 
 FULFILLMENT.md

api/doc.go

@@ -0,0 +1,3 @@
+// Command api is the HTTP backend: it boots the router, bolts on all the
+// middleware, and answers the requests the TUI throws at it.
+package main

api/handlers/doc.go

@@ -0,0 +1,3 @@
+// Package handlers is where the real work happens, one function per endpoint:
+// carts, orders, products, addresses, cards, webhooks, and the rest.
+package handlers

api/middleware/doc.go

@@ -0,0 +1,4 @@
+// Package middleware holds the stuff that runs on every request before a
+// handler ever sees it: auth, CORS, logging, rate limiting, metrics, and a
+// recovery net for panics.
+package middleware

api/routes/doc.go

@@ -0,0 +1,3 @@
+// Package routes is the switchboard: it maps every URL to the handler that
+// knows what to do with it.
+package routes

cmd/reconcile-cards/doc.go

@@ -0,0 +1,3 @@
+// Command reconcile-cards hunts down saved cards that Stripe no longer knows
+// about and detaches them. Run it with -dry-run first if you're nervous.
+package main

pkg/api/doc.go

@@ -0,0 +1,3 @@
+// Package api is the client side of the house: it talks to our HTTP backend
+// so other Go code doesn't have to hand-roll requests.
+package api

pkg/auth/doc.go

@@ -0,0 +1,3 @@
+// Package auth sorts out who you are: logging in with an SSH key and minting
+// the JWT you carry around afterwards.
+package auth

pkg/bring/doc.go

@@ -0,0 +1,3 @@
+// Package bring talks to Bring, the Norwegian postal service, for booking
+// shipments and printing labels.
+package bring

pkg/config/doc.go

@@ -0,0 +1,3 @@
+// Package config reads everything out of the environment so secrets and
+// settings stay out of the source code.
+package config

pkg/database/doc.go

@@ -0,0 +1,3 @@
+// Package database opens the SQLite connection, runs the migrations, and
+// drops in some seed data so the shop isn't empty on a fresh boot.
+package database

pkg/database/seed.go

@@ -26,6 +26,7 @@ func Seed(db *gorm.DB) error {
 		{
 			Name:        "Espresso",
 			RoastType:   "Dark Roast",
+			RoastLevel:  5,
 			Ounces:      2,
 			BeanType:    "Arabica",
 			Price:       1800, // $18.00
@@ -35,6 +36,7 @@ func Seed(db *gorm.DB) error {
 		{
 			Name:        "Americano",
 			RoastType:   "Medium Roast",
+			RoastLevel:  3,
 			Ounces:      8,
 			BeanType:    "Arabica",
 			Price:       2200, // $22.00
@@ -44,6 +46,7 @@ func Seed(db *gorm.DB) error {
 		{
 			Name:        "Cappuccino",
 			RoastType:   "Medium Roast",
+			RoastLevel:  3,
 			Ounces:      6,
 			BeanType:    "Arabica",
 			Price:       2200, // $22.00
@@ -53,6 +56,7 @@ func Seed(db *gorm.DB) error {
 		{
 			Name:        "Latte",
 			RoastType:   "Medium Roast",
+			RoastLevel:  2,
 			Ounces:      12,
 			BeanType:    "Arabica",
 			Price:       2500, // $25.00
@@ -62,6 +66,7 @@ func Seed(db *gorm.DB) error {
 		{
 			Name:        "Mocha",
 			RoastType:   "Dark Roast",
+			RoastLevel:  4,
 			Ounces:      12,
 			BeanType:    "Arabica",
 			Price:       3000, // $30.00
@@ -71,6 +76,7 @@ func Seed(db *gorm.DB) error {
 		{
 			Name:        "Macchiato",
 			RoastType:   "Dark Roast",
+			RoastLevel:  4,
 			Ounces:      3,
 			BeanType:    "Robusta Blend",
 			Price:       1800, // $18.00

pkg/models/coffee.go

@@ -11,6 +11,7 @@ type Coffee struct {
 	ID          uint           `gorm:"primaryKey" json:"id"`
 	Name        string         `gorm:"size:255;not null" json:"name"`
 	RoastType   string         `gorm:"size:100" json:"roast_type"`
+	RoastLevel  int            `json:"roast_level"` // 1-5 roast-intensity
 	Ounces      int            `json:"ounces"`
 	BeanType    string         `gorm:"size:100" json:"bean_type"`
 	Price       int            `gorm:"not null" json:"price"`

pkg/models/doc.go

@@ -0,0 +1,3 @@
+// Package models is the shared vocabulary of the app: coffee, carts, orders,
+// addresses, cards, users, and the other nouns everything passes around.
+package models

pkg/observability/doc.go

@@ -0,0 +1,3 @@
+// Package observability sets up tracing and structured logs so that when
+// something breaks at 3am you stand a chance of figuring out why.
+package observability

pkg/shipping/doc.go

@@ -0,0 +1,3 @@
+// Package shipping holds the plain shipping types that the rest of the app
+// passes back and forth.
+package shipping

pkg/shippo/doc.go

@@ -0,0 +1,2 @@
+// Package shippo talks to the Shippo API for shipping rates and labels.
+package shippo

pkg/stripeclient/doc.go

@@ -0,0 +1,3 @@
+// Package stripeclient wires up the Stripe SDK once at startup (with tracing
+// baked in) so everyone else can just make calls.
+package stripeclient

pkg/tui/account.go

@@ -1,6 +1,8 @@
 package tui
 
 import (
+	"strings"
+
 	"charm.land/bubbles/v2/viewport"
 	tea "charm.land/bubbletea/v2"
 	"charm.land/lipgloss/v2"
@@ -8,36 +10,54 @@ import (
 	"terminalShop/pkg/models"
 )
 
-// updateAccountViewport initializes or resizes the detail viewport for the account page.
-// Follows the reference pattern: each page owns its own viewport(s).
-func (m Model) updateAccountViewport() Model {
-	// Match the reference: only subtract header + footer, no extra margins
-	// (account is a viewport page — views.go renders it without margin padding)
+// accountBodyHeight returns the inner content height of the account body
+// panels. The body is quantized to whole order cards so the menu panel's
+// bottom border lines up exactly with the last visible card; the two gap
+// rows around the body host the up/down scroll arrows.
+func (m Model) accountBodyHeight() int {
 	headerHeight := lipgloss.Height(m.BuildHeader())
 	footerHeight := lipgloss.Height(m.BuildFooter())
-	verticalMarginHeight := headerHeight + footerHeight
-
-	availableHeight := m.heightContainer - verticalMarginHeight
-
-	leftWidth := 18
-	rightWidth := m.widthContent - leftWidth - 2
-	detailWidth := rightWidth
-	if m.size < large {
-		detailWidth = m.widthContent
-		// In stacked mode, reduce available height by the left panel
-		leftPanelHeight := len(models.AccountMenuItems) + 1
-		availableHeight -= leftPanelHeight
+	budget := m.heightContainer - headerHeight - footerHeight - 2
+	cards := budget / orderCardHeight
+	if cards < 1 {
+		cards = 1
 	}
-	if availableHeight < 3 {
-		availableHeight = 3
+	return cards*orderCardHeight - 2
+}
+
+// accountDetailWidth returns the width of the unboxed detail area: the chrome
+// width minus the menu panel and the gap. The detail side has no outer panel
+// (its content draws its own boxes), so it reclaims the border + padding.
+func (m Model) accountDetailWidth() int {
+	contentW, menuW, _, _ := m.shopLayout()
+	if m.size < large {
+		return contentW
+	}
+	return contentW - (menuW + 4) - 1
+}
+
+// updateAccountViewport initializes or resizes the detail viewport for the account page.
+// The viewport spans the unboxed detail area to the right of the menu panel.
+func (m Model) updateAccountViewport() Model {
+	detailW := m.accountDetailWidth()
+	// +2: no panel on the detail side, so the viewport spans the same rows
+	// as the menu panel including its border rows — tops and bottoms align.
+	availableHeight := m.accountBodyHeight() + 2
+	if m.size < large {
+		// Stacked: the menu panel sits above the detail area
+		menuPanelHeight := len(models.AccountMenuItems) + 2
+		availableHeight -= menuPanelHeight
+		if availableHeight < 3 {
+			availableHeight = 3
+		}
 	}
 
 	if !m.account.viewportReady {
-		m.account.detailViewport = viewport.New(viewport.WithWidth(detailWidth), viewport.WithHeight(availableHeight))
+		m.account.detailViewport = viewport.New(viewport.WithWidth(detailW), viewport.WithHeight(availableHeight))
 		m.account.detailViewport.KeyMap = modifiedKeyMap
 		m.account.viewportReady = true
 	} else {
-		m.account.detailViewport.SetWidth(detailWidth)
+		m.account.detailViewport.SetWidth(detailW)
 		m.account.detailViewport.SetHeight(availableHeight)
 	}
 
@@ -46,12 +66,7 @@ func (m Model) updateAccountViewport() Model {
 
 // getAccountDetailContent generates the content string for the current detail panel.
 func (m Model) getAccountDetailContent() string {
-	leftWidth := 18
-	rightWidth := m.widthContent - leftWidth - 2
-	detailContentWidth := rightWidth - 2
-	if m.size < large {
-		detailContentWidth = m.widthContent - 2
-	}
+	detailContentWidth := m.accountDetailWidth()
 
 	if m.account.cursor < 0 || m.account.cursor >= len(models.AccountMenuItems) {
 		return ""
@@ -68,7 +83,6 @@ func (m Model) getAccountDetailContent() string {
 	case "cards":
 		return m.CardsView(detailContentWidth)
 	case "faq":
-		titleStyle := m.theme.TextAccent().Bold(true).MarginBottom(2)
 		questionStyle := m.theme.TextHighlight().Bold(true)
 		contentStyle := m.theme.TextBody().Width(detailContentWidth)
 		faqContent := ""
@@ -79,7 +93,7 @@ func (m Model) getAccountDetailContent() string {
 				faqContent += "\n\n"
 			}
 		}
-		detailView := titleStyle.Render("FAQ") + "\n\n" + faqContent
+		detailView := faqContent
 		if !m.account.faqFocused {
 			hintStyle := m.theme.TextDim()
 			detailView += "\n\n" + hintStyle.Render("enter: scroll faq")
@@ -103,19 +117,25 @@ func (m Model) scrollToAccountDetailItem() Model {
 
 	switch {
 	case m.account.orderViewState == 1:
-		// No title in list mode, cards joined with JoinVertical (no gaps)
-		// Card: border(2) + content(2) + PaddingLeft only = 4 lines
-		headerOffset = 0
-		itemHeight = 4
-		itemCount = len(m.currentOrderList())
-		selectedIndex = m.account.orderCursor
+		// Order list uses whole-card windowing instead of viewport scroll:
+		// shift the window just enough to keep the cursor's card visible.
+		page := m.orderListPageSize()
+		if m.account.orderCursor < m.account.orderWindowStart {
+			m.account.orderWindowStart = m.account.orderCursor
+		}
+		if m.account.orderCursor >= m.account.orderWindowStart+page {
+			m.account.orderWindowStart = m.account.orderCursor - page + 1
+		}
+		m.account.detailViewport.GotoTop()
+		return m
 	case m.account.addressListFocused:
-		headerOffset = 3
+		// Titles were removed from the detail views, lists start at the top
+		headerOffset = 0
 		itemHeight = 5
 		itemCount = len(m.SavedAddresses)
 		selectedIndex = m.account.addressCursor
 	case m.account.cardListFocused:
-		headerOffset = 3
+		headerOffset = 0
 		itemHeight = 4
 		itemCount = len(m.SavedCards)
 		selectedIndex = m.account.cardCursor
@@ -143,23 +163,30 @@ func (m Model) scrollToAccountDetailItem() Model {
 	return m
 }
 
-func (m Model) BuildAccountView(availableHeight int) string {
-	leftWidth := 18
+func (m Model) BuildAccountView() string {
+	_, menuW, _, _ := m.shopLayout()
 
-	// Build the left panel (menu items)
-	leftPanel := ""
+	// Left panel: menu items. The highlight is blue while the user navigates
+	// the menu, and falls back to the gray pill when focus has moved into the
+	// detail area (browsing orders, managing addresses/cards, scrolling faq).
+	focusedInside := m.account.orderViewState > 0 || m.account.addressListFocused ||
+		m.account.cardListFocused || m.account.faqFocused
+	pillBg := m.theme.Highlight()
+	if focusedInside {
+		pillBg = cPill
+	}
+	var menu []string
 	for i, item := range models.AccountMenuItems {
 		if m.account.cursor == i {
-			style := m.theme.Base().Background(m.theme.Highlight()).Foreground(m.theme.Accent()).Padding(0, 1).Width(leftWidth - 2).Align(lipgloss.Left)
-			leftPanel += style.Render(item) + "\n"
+			menu = append(menu, lipgloss.NewStyle().Width(menuW).
+				Background(pillBg).Foreground(cWhite).Bold(true).
+				Render(" "+item))
 		} else {
-			style := m.theme.TextBody().Padding(0, 1).Width(leftWidth - 2).Align(lipgloss.Left)
-			leftPanel += style.Render(item) + "\n"
+			menu = append(menu, lipgloss.NewStyle().Width(menuW).
+				Render(" "+pBody.Render(item)))
 		}
 	}
-
-	leftContainer := m.theme.Base().
-		Width(leftWidth)
+	menuContent := lipgloss.JoinVertical(lipgloss.Left, menu...)
 
 	// Generate detail content and set it on the viewport
 	detailContent := m.getAccountDetailContent()
@@ -168,25 +195,43 @@ func (m Model) BuildAccountView(availableHeight int) string {
 	// Viewport handles scrolling/clipping — no manual line-slicing needed
 	detailRendered := m.account.detailViewport.View()
 
-	// Responsive layout: side-by-side on large, stacked on small/medium
+	// Responsive layout: menu panel beside the unboxed detail area on large,
+	// stacked on small/medium. The detail side draws its own item boxes.
+	var body string
 	if m.size < large {
-		return lipgloss.JoinVertical(
+		body = lipgloss.JoinVertical(
 			lipgloss.Left,
-			leftContainer.Render(leftPanel),
+			panel(menuW, 0, menuContent),
+			detailRendered,
+		)
+	} else {
+		bodyH := m.accountBodyHeight()
+		body = lipgloss.JoinHorizontal(
+			lipgloss.Top,
+			panel(menuW, bodyH, menuContent),
+			" ",
 			detailRendered,
 		)
 	}
 
-	return lipgloss.JoinHorizontal(
-		lipgloss.Top,
-		leftContainer.Render(leftPanel),
-		"  ",
-		detailRendered,
-	)
+	// Blank rows separate the body from the header and footer boxes. When the
+	// windowed order list has hidden items, the arrows occupy those gap rows,
+	// centered over the card column, so the cards themselves always span
+	// exactly the menu panel's rows — top and bottom borders aligned.
+	topGap := ""
+	if above := m.orderHiddenAbove(); above > 0 && m.size >= large {
+		topGap = strings.Repeat(" ", menuW+5) +
+			orderScrollIndicator("↑", above, m.accountDetailWidth())
+	}
+	bottomGap := ""
+	if below := m.orderHiddenBelow(); below > 0 && m.size >= large {
+		bottomGap = strings.Repeat(" ", menuW+5) +
+			orderScrollIndicator("↓", below, m.accountDetailWidth())
+	}
+	return topGap + "\n" + body + "\n" + bottomGap
 }
 
 func (m Model) AboutView(width int) string {
-	titleStyle := m.theme.TextAccent().Bold(true).MarginBottom(2)
 	contentStyle := m.theme.TextBody().Width(width)
 	// USE this if wanting to add a corp name later
 	// accentStyle := m.theme.TextHighlight().Bold(true)
@@ -208,7 +253,7 @@ func (m Model) AboutView(width int) string {
 		width,
 	)) + "\n"
 
-	return titleStyle.Render("About") + "\n\n" + aboutContent
+	return aboutContent
 }
 
 func (m Model) AccountUpdate(msg tea.Msg) (Model, tea.Cmd) {
@@ -335,6 +380,7 @@ func (m Model) AccountUpdate(msg tea.Msg) (Model, tea.Cmd) {
 				case 0:
 					m.account.orderViewState = 1
 					m.account.orderCursor = 0
+					m.account.orderWindowStart = 0
 					m.account.detailViewport.GotoTop()
 					m.footer = []footerCommand{
 						{key: "j/k", value: "orders"},

pkg/tui/account_addresses.go

@@ -1,10 +1,9 @@
 package tui
 
 func (m Model) AddressesView(width int) string {
-	titleStyle := m.theme.TextAccent().Bold(true).MarginBottom(2)
 	contentStyle := m.theme.TextBody().Width(width)
 
-	lines := titleStyle.Render("Address") + "\n\n"
+	lines := ""
 	if len(m.SavedAddresses) == 0 {
 		lines += contentStyle.Render("No saved addresses")
 	} else {

pkg/tui/account_cards.go

@@ -5,10 +5,9 @@ import (
 )
 
 func (m Model) CardsView(width int) string {
-	titleSTyle := m.theme.TextAccent().Bold(true).MarginBottom(2)
 	contentStyle := m.theme.TextBody().Width(width)
 
-	lines := titleSTyle.Render("Cards") + "\n\n"
+	lines := ""
 	if m.SavedCardsIsEmpty() {
 		lines += contentStyle.Render("No saved cards")
 	} else {

pkg/tui/account_orders.go

@@ -10,11 +10,11 @@ import (
 )
 
 func (m Model) OrdersView(width int) string {
-	return m.orderListView("Order History", m.HistoryOrders(), width)
+	return m.orderListView(m.HistoryOrders(), width)
 }
 
 func (m Model) ActiveOrdersView(width int) string {
-	return m.orderListView("Active Orders", m.ActiveOrders(), width)
+	return m.orderListView(m.ActiveOrders(), width)
 }
 
 func (m Model) ActiveOrders() []models.Order {
@@ -65,41 +65,95 @@ func (m Model) currentOrderList() []models.Order {
 	return nil
 }
 
-func (m Model) orderListView(title string, orders []models.Order, width int) string {
-	titleStyle := m.theme.TextAccent().Bold(true).MarginBottom(1)
+// orderCardHeight is the rendered height of one order card:
+// border (2) + content lines (2), no vertical padding.
+const orderCardHeight = 4
+
+// orderListPageSize returns how many whole order cards fit in the detail
+// area. Both scroll arrows render outside the list, in the gap rows above
+// and below the body, so the cards use the full viewport height.
+func (m Model) orderListPageSize() int {
+	n := m.account.detailViewport.Height() / orderCardHeight
+	if n < 1 {
+		n = 1
+	}
+	return n
+}
+
+// orderHiddenAbove returns how many order cards are scrolled off above the
+// windowed list, or 0 when the windowed order list isn't showing.
+func (m Model) orderHiddenAbove() int {
+	if m.account.orderViewState != 1 || !m.OrdersLoaded {
+		return 0
+	}
+	orders := m.currentOrderList()
+	if len(orders) == 0 {
+		return 0
+	}
+	page := m.orderListPageSize()
+	start := m.account.orderWindowStart
+	if start > len(orders)-page {
+		start = len(orders) - page
+	}
+	if start < 0 {
+		start = 0
+	}
+	return start
+}
+
+// orderHiddenBelow returns how many order cards are scrolled off below the
+// windowed list, or 0 when the windowed order list isn't showing.
+func (m Model) orderHiddenBelow() int {
+	if m.account.orderViewState == 2 || !m.OrdersLoaded {
+		return 0
+	}
+	orders := m.currentOrderList()
+	if len(orders) == 0 {
+		return 0
+	}
+	below := len(orders) - (m.orderHiddenAbove() + m.orderListPageSize())
+	if below < 0 {
+		below = 0
+	}
+	return below
+}
+
+// orderScrollIndicator renders the dim "more items" arrow row, centered
+// across the card width.
+func orderScrollIndicator(arrow string, count, width int) string {
+	return pDim.Width(width).Align(lipgloss.Center).
+		Render(fmt.Sprintf("%s %d more", arrow, count))
+}
+
+func (m Model) orderListView(orders []models.Order, width int) string {
 	contentStyle := m.theme.TextBody().Width(width)
 
 	if !m.OrdersLoaded {
-		return titleStyle.Render(title) + "\n" + contentStyle.Render("Loading orders...")
+		return contentStyle.Render("Loading orders...")
 	}
 	if len(orders) == 0 {
-		return titleStyle.Render(title) + "\n" + contentStyle.Render("No orders yet")
+		return contentStyle.Render("No orders yet")
 	}
 	if m.account.orderViewState == 2 {
 		return m.buildOrderDetailView(orders[m.account.orderCursor], width)
 	}
 
-	boxWidth := width - 2
+	// Whole-card windowing: render only fully-visible cards, never clipping a
+	// card mid-border. Both scroll arrows render in BuildAccountView's gap
+	// rows, so the cards span exactly the menu panel's rows.
+	page := m.orderListPageSize()
+	start := m.orderHiddenAbove()
+	end := start + page
+	if end > len(orders) {
+		end = len(orders)
+	}
 
-	// Build cards and join vertically — no manual "\n" gaps means fixed spacing
-	var cards []string
-	for i, order := range orders {
+	var rows []string
+	for i := start; i < end; i++ {
 		isSelected := m.account.orderViewState == 1 && i == m.account.orderCursor
-		cards = append(cards, m.buildOrderCard(order, boxWidth, isSelected))
+		rows = append(rows, m.buildOrderCard(orders[i], width, isSelected))
 	}
-	cardList := lipgloss.JoinVertical(lipgloss.Left, cards...)
-
-	// In preview mode (viewState 0), show title + hint
-	if m.account.orderViewState == 0 {
-		hintStyle := m.theme.TextDim()
-		return titleStyle.Render(title) + "\n" +
-			cardList + "\n" +
-			hintStyle.Render("enter: browse orders")
-	}
-
-	// In list browsing mode (viewState 1), just show cards — no title
-	// (the left panel menu already shows "order history" as selected)
-	return cardList
+	return lipgloss.JoinVertical(lipgloss.Left, rows...)
 }
 
 // buildOrderCard renders a single order as a bordered box with fixed height.

pkg/tui/cart.go

@@ -9,36 +9,42 @@ import (
 )
 
 func (m Model) updateCartViewport() Model {
+	contentW, _, _, _ := m.shopLayout()
 	headerH := lipgloss.Height(m.BuildHeader())
 	breadH := lipgloss.Height(m.BuildBreadcrumbs())
 	footerH := lipgloss.Height(m.BuildFooter())
-	availH := m.heightContainer - headerH - footerH - breadH
+	// 2 = blank gap rows around the cart list
+	availH := m.heightContainer - headerH - footerH - breadH - 2
 	if availH < 1 {
 		availH = 1
 	}
 	if !m.cart.viewportReady {
-		m.cart.viewport = viewport.New(viewport.WithWidth(m.widthContent), viewport.WithHeight(availH))
+		m.cart.viewport = viewport.New(viewport.WithWidth(contentW), viewport.WithHeight(availH))
 		m.cart.viewport.KeyMap = viewport.KeyMap{}
 		m.cart.viewportReady = true
 	} else {
-		m.cart.viewport.SetWidth(m.widthContent)
+		m.cart.viewport.SetWidth(contentW)
 		m.cart.viewport.SetHeight(availH)
 	}
 	return m
 }
 
 func (m Model) generateCartContent() string {
+	contentW, _, _, _ := m.shopLayout()
+
 	if m.IsCartEmpty() {
 		emptyStyle := m.theme.TextDim().
 			Align(lipgloss.Center).
-			Width(m.widthContent).
+			Width(contentW).
 			Padding(2, 0)
 		render := emptyStyle.Render("Your cart is empty\n\nPress s to go back to shop")
 		return render
 	}
 
 	cartItems := ""
-	boxWidth := m.widthContent - 4
+	// Cart cards span the full chrome width so they line up with the
+	// header and footer boxes.
+	boxWidth := contentW
 	itemSlice := m.GetCartItemsSlice()
 
 	boxPadding := 0
@@ -94,7 +100,7 @@ func (m Model) generateCartContent() string {
 			boxContent = m.theme.TextAccent().Render(boxContent)
 		}
 		box := m.createBoxInner(boxContent, isSelected, lipgloss.Left, 2, boxPadding, boxWidth)
-		cartItems += m.theme.Base().Width(m.widthContent).Align(lipgloss.Center).Render(box)
+		cartItems += box
 
 		if idx < len(itemSlice)-1 {
 			cartItems += "\n"
@@ -123,12 +129,9 @@ func (m Model) CartView() string {
 			m.cart.viewport.SetYOffset(targetY - m.cart.viewport.Height() + itemHeight)
 		}
 	}
-	return lipgloss.Place(
-		m.widthContainer,
-		lipgloss.Height(m.cart.viewport.View()),
-		lipgloss.Center, lipgloss.Center,
-		m.cart.viewport.View(),
-	)
+	// Blank rows separate the list from the chrome; no Place wrapper so the
+	// cards stay left-aligned with the header and footer boxes.
+	return "\n" + m.cart.viewport.View() + "\n"
 }
 
 func (m Model) CartUpdate(msg tea.Msg) (Model, tea.Cmd) {

pkg/tui/doc.go

@@ -0,0 +1,3 @@
+// Package tui is the terminal UI you see over SSH: the shop, the cart, your
+// account, and the checkout flow, all drawn with Bubbletea.
+package tui

pkg/tui/footer.go

@@ -6,20 +6,26 @@ import (
 	"charm.land/lipgloss/v2"
 )
 
+// BuildFooter renders the bottom chrome bar with the current page keybinds.
+// Layout ported from the design prototype at ~/programming/test/shop.go.
 func (m Model) BuildFooter() string {
-	keybindStyle := m.theme.TextDim().Bold(true)
-	descStyle := m.theme.TextDim()
+	_, _, _, wideW := m.shopLayout()
 
+	item := func(k, v string) string {
+		return pBody.Render(k) + " " + pDim.Render(v)
+	}
+
+	var keys string
 	if m.size == small {
-		footerText := keybindStyle.Render("m") + " " + descStyle.Render("menu")
-		return lipgloss.NewStyle().Align(lipgloss.Center).Width(m.widthContainer).Render(footerText)
+		keys = item("m", "menu")
+	} else {
+		parts := make([]string, 0, len(m.footer))
+		for _, cmd := range m.footer {
+			parts = append(parts, item(cmd.key, cmd.value))
+		}
+		keys = strings.Join(parts, pDim.Render(" · "))
 	}
 
-	parts := []string{}
-	for _, cmd := range m.footer {
-		parts = append(parts, keybindStyle.Render(cmd.key)+" "+descStyle.Render(cmd.value))
-	}
-	footerText := strings.Join(parts, "    ")
-
-	return lipgloss.NewStyle().Align(lipgloss.Center).Width(m.widthContainer).Render(footerText)
+	row := lipgloss.NewStyle().Width(wideW).Align(lipgloss.Center).Render(keys)
+	return panel(wideW, 0, row)
 }

pkg/tui/header.go

@@ -2,57 +2,72 @@ package tui
 
 import (
 	"fmt"
+	"image/color"
+	"strings"
 
 	"charm.land/lipgloss/v2"
-	"charm.land/lipgloss/v2/table"
 )
 
-func (m Model) BuildHeader() string {
-	bold := m.theme.TextAccent().Bold(true).Render
-	accent := m.theme.TextAccent().Render
-	base := m.theme.Base().Render
-	cursor := m.theme.Base().Background(m.theme.Brand()).Render(" ")
-
-	mark := bold("t") + cursor
-	logo := bold("terminal")
-	menu := bold("m") + base(" ☰")
-
-	tab := func(key, name string, active bool) string {
-		if active {
-			return accent(key + " " + name)
+// cartBlendColor mixes the colors of all cart items, weighted by quantity,
+// so the header price tints toward whatever dominates the cart.
+func (m Model) cartBlendColor() color.Color {
+	var rSum, gSum, bSum, n int
+	for _, item := range m.Cart {
+		r, g, b, ok := parseHexColor(item.Coffee.Color)
+		if !ok {
+			continue
 		}
-		return accent(key) + base(" "+name)
+		rSum += r * item.Quantity
+		gSum += g * item.Quantity
+		bSum += b * item.Quantity
+		n += item.Quantity
 	}
-	shop := tab("s", "shop", m.currentPage == shopPage)
-	account := tab("a", "account", m.currentPage == accountPage)
-
-	priceStr := fmt.Sprintf(" $%2v", m.CalculateSubtotal()/100)
-	countStr := fmt.Sprintf(" [%d]", m.CartItemCount())
-	cartLabel := base(" cart")
-	if m.inCartFlow() {
-		cartLabel = accent(" cart")
+	if n == 0 {
+		return cWhite
 	}
-	cart := accent("c") + cartLabel + accent(priceStr) + base(countStr)
-
-	var tabs []string
-	switch m.size {
-	case small:
-		tabs = []string{mark, cart}
-	case medium:
-		tabs = []string{menu, logo, cart}
-	default:
-		tabs = []string{logo, shop, account, cart}
-	}
-
-	tbl := table.New().Border(lipgloss.NormalBorder()).BorderStyle(lipgloss.NewStyle().Foreground(m.theme.Border())).Row(tabs...).Width(m.widthContent).StyleFunc(func(row, col int) lipgloss.Style {
-		return m.theme.Base().Padding(0, 1).AlignHorizontal(lipgloss.Center)
-	}).Render()
-
-	return lipgloss.Place(
-		m.widthContainer,
-		lipgloss.Height(tbl),
-		lipgloss.Center,
-		lipgloss.Center,
-		tbl,
-	)
+	return lipgloss.Color(fmt.Sprintf("#%02X%02X%02X", rSum/n, gSum/n, bSum/n))
+}
+
+// BuildHeader renders the top chrome bar: brand, tab pills, and cart summary.
+// Layout ported from the design prototype at ~/programming/test/shop.go.
+func (m Model) BuildHeader() string {
+	_, _, _, wideW := m.shopLayout()
+
+	brand := pWht.Bold(true).Render("terminal")
+
+	pill := lipgloss.NewStyle().Background(cPill).Foreground(cWhite).Bold(true).Padding(0, 1)
+	tab := func(key, label string, active bool) string {
+		if active {
+			return pill.Render(label)
+		}
+		return pDim.Render(key+" ") + pBody.Render(label)
+	}
+
+	var left string
+	if m.size == small {
+		left = brand
+	} else {
+		left = strings.Join([]string{
+			brand,
+			tab("s", "shop", m.currentPage == shopPage),
+			tab("a", "account", m.currentPage == accountPage),
+		}, "   ")
+	}
+
+	cartLabel := pDim.Render("cart  ")
+	if m.inCartFlow() {
+		cartLabel = pWht.Bold(true).Render("cart  ")
+	}
+	cart := cartLabel +
+		lipgloss.NewStyle().Foreground(m.cartBlendColor()).Bold(true).
+			Render(fmt.Sprintf("$%d", m.CalculateSubtotal()/100)) +
+		pDim.Render(fmt.Sprintf("  ·  %d", m.CartItemCount()))
+
+	gap := wideW - lipgloss.Width(left) - lipgloss.Width(cart)
+	if gap < 1 {
+		gap = 1
+	}
+	row := left + strings.Repeat(" ", gap) + cart
+
+	return panel(wideW, 0, row)
 }

pkg/tui/model.go

@@ -142,10 +142,7 @@ type Model struct {
 }
 
 type shopState struct {
-	selected       int
-	menuViewport   viewport.Model
-	detailViewport viewport.Model
-	viewportsReady bool
+	selected int
 }
 
 type splashState struct {
@@ -185,6 +182,7 @@ type accountState struct {
 	cursor             int
 	orderViewState     int
 	orderCursor        int
+	orderWindowStart   int // first fully-visible card in the windowed order list
 	orderYOffset       int // saved scroll pos when entering order detail
 	faqFocused         bool
 	addressListFocused bool
@@ -240,7 +238,6 @@ func (m Model) SwitchPage(p page) Model {
 
 func (m Model) ShopSwitch() (Model, tea.Cmd) {
 	m = m.SwitchPage(shopPage)
-	m = m.updateShopViewports()
 	m.footer = []footerCommand{
 		{key: "j/k", value: "products"},
 		{key: "+/-", value: "qty"},
@@ -265,13 +262,12 @@ func (m Model) CartSwitch() (Model, tea.Cmd) {
 			{key: "q", value: "quit"},
 		}
 	} else {
+		// Keep this list short enough to fit on one footer line.
 		m.footer = []footerCommand{
 			{key: "j/k", value: "items"},
 			{key: "+/-", value: "qty"},
-			{key: "p/enter", value: "checkout"},
+			{key: "enter", value: "checkout"},
 			{key: "s", value: "shop"},
-			{key: "a", value: "account"},
-			{key: "pgup/pgdn", value: "scroll"},
 			{key: "?", value: "help"},
 			{key: "q", value: "quit"},
 		}
@@ -841,6 +837,7 @@ func NewModel(username string) Model {
 			{
 				Name:        "Espresso",
 				RoastType:   "Dark Roast",
+				RoastLevel:  5,
 				Ounces:      2,
 				BeanType:    "Arabica",
 				Price:       350, // $3.50
@@ -850,6 +847,7 @@ func NewModel(username string) Model {
 			{
 				Name:        "Latte",
 				RoastType:   "Medium Roast",
+				RoastLevel:  2,
 				Ounces:      12,
 				BeanType:    "Arabica Blend",
 				Price:       500, // $5.00
@@ -859,6 +857,7 @@ func NewModel(username string) Model {
 			{
 				Name:        "Cappuccino",
 				RoastType:   "Medium Roast",
+				RoastLevel:  3,
 				Ounces:      8,
 				BeanType:    "Italian Blend",
 				Price:       450, // $4.50
@@ -868,6 +867,7 @@ func NewModel(username string) Model {
 			{
 				Name:        "Americano",
 				RoastType:   "Dark Roast",
+				RoastLevel:  4,
 				Ounces:      16,
 				BeanType:    "Arabica",
 				Price:       400, // $4.00
@@ -877,6 +877,7 @@ func NewModel(username string) Model {
 			{
 				Name:        "Mocha",
 				RoastType:   "Medium Roast",
+				RoastLevel:  3,
 				Ounces:      16,
 				BeanType:    "Colombian",
 				Price:       550, // $5.50
@@ -886,6 +887,7 @@ func NewModel(username string) Model {
 			{
 				Name:        "Macchiato",
 				RoastType:   "Dark Roast",
+				RoastLevel:  4,
 				Ounces:      3,
 				BeanType:    "Robusta Blend",
 				Price:       425, // $4.25
@@ -930,10 +932,6 @@ func NewModelWithAuth(fingerprint string, pubKeyStr string, apiURL string, clien
 	return m
 }
 
-func newViewport(w, h int) viewport.Model {
-	return viewport.New(viewport.WithWidth(w), viewport.WithHeight(h))
-}
-
 func (m Model) collectCardCmd() tea.Cmd {
 	return func() tea.Msg {
 		if m.APIClient == nil {

pkg/tui/palette.go

@@ -0,0 +1,70 @@
+package tui
+
+import (
+	"image/color"
+	"strconv"
+	"strings"
+
+	"charm.land/lipgloss/v2"
+)
+
+// Palette and base styles for the boxed shop chrome.
+// Ported from the design prototype at ~/programming/test/shop.go.
+var (
+	cWhite = lipgloss.Color("#EAEAEA")
+	cBody  = lipgloss.Color("#9A9A9A")
+	cDim   = lipgloss.Color("#5A5A5A")
+	cLine  = lipgloss.Color("#3A3A3A")
+	cInk   = lipgloss.Color("#161616") // text on a light colored block
+	cGreen = lipgloss.Color("#4FB477")
+	cRed   = lipgloss.Color("#E06C6C")
+	cGold  = lipgloss.Color("#D0962E") // single accent
+	cPill  = lipgloss.Color("#2E2E2E") // active-tab pill bg
+
+	pBody = lipgloss.NewStyle().Foreground(cBody)
+	pDim  = lipgloss.NewStyle().Foreground(cDim)
+	pWht  = lipgloss.NewStyle().Foreground(cWhite)
+)
+
+// parseHexColor splits a "#RRGGBB" string into its channel values.
+func parseHexColor(s string) (r, g, b int, ok bool) {
+	s = strings.TrimPrefix(s, "#")
+	if len(s) != 6 {
+		return 0, 0, 0, false
+	}
+	v, err := strconv.ParseUint(s, 16, 32)
+	if err != nil {
+		return 0, 0, 0, false
+	}
+	return int(v >> 16), int((v >> 8) & 0xFF), int(v & 0xFF), true
+}
+
+// contrastColor returns ink for light backgrounds and white for dark ones,
+// using perceived luminance so text stays readable on any product color.
+func contrastColor(hex string) color.Color {
+	r, g, b, ok := parseHexColor(hex)
+	if !ok {
+		return cWhite
+	}
+	lum := (299*r + 587*g + 114*b) / 1000
+	if lum > 140 {
+		return cInk
+	}
+	return cWhite
+}
+
+// panel wraps content in a rounded box. textW is the inner text width and
+// innerH the inner content height; the total render size is textW+4 by
+// innerH+2. Ported from the design prototype at ~/programming/test/shop.go,
+// adjusted for lipgloss v2 where Width/Height include the border.
+func panel(textW, innerH int, content string) string {
+	s := lipgloss.NewStyle().
+		Border(lipgloss.RoundedBorder()).
+		BorderForeground(cLine).
+		Padding(0, 1).
+		Width(textW + 4)
+	if innerH > 0 {
+		s = s.Height(innerH + 2)
+	}
+	return s.Render(content)
+}

pkg/tui/payment_form.go

@@ -276,9 +276,7 @@ func (m Model) updatePaymentViewport() Model {
 	breadH := lipgloss.Height(m.BuildBreadcrumbs())
 	footerH := lipgloss.Height(m.BuildFooter())
 	availH := m.heightContainer - headerH - footerH - breadH
-	if availH < 1 {
-		availH = 1
-	}
+	availH = max(availH, 1)
 	if !m.payment.viewportReady {
 		m.payment.viewport = viewport.New(viewport.WithWidth(m.widthContent), viewport.WithHeight(availH))
 		m.payment.viewport.KeyMap = viewport.KeyMap{}
@@ -303,7 +301,7 @@ func (m Model) PaymentPageView() string {
 			m.widthContainer,
 			m.payment.viewport.Height(),
 			lipgloss.Center, lipgloss.Center,
-			m.renderPaymentHttpsView(),
+			m.renderPaymentHTTPSView(),
 		)
 	} else if m.payment.view == 0 && m.payment.form == nil {
 		content = m.RenderCardList()
@@ -374,7 +372,7 @@ func (m Model) RenderCardList() string {
 	return lipgloss.JoinVertical(lipgloss.Left, parts...)
 }
 
-func (m Model) renderPaymentHttpsView() string {
+func (m Model) renderPaymentHTTPSView() string {
 	baseStyle := m.theme.TextLabel()
 	accentStyle := m.theme.TextHighlight()
 

pkg/tui/qrfefe/doc.go

@@ -0,0 +1,3 @@
+// Package qrfefe turns text into a QR code drawn with terminal block
+// characters, handy for showing links you can scan right off the screen.
+package qrfefe

pkg/tui/render_smoke_test.go

@@ -0,0 +1,194 @@
+package tui
+
+import (
+	"regexp"
+	"strings"
+	"testing"
+
+	"terminalShop/pkg/models"
+)
+
+var ansiRE = regexp.MustCompile("\x1b\\[[0-9;]*m")
+
+// TestRenderShopSmoke prints the rendered shop frame so chrome alignment can
+// be inspected, and asserts that the header, body, and footer boxes share the
+// same left and right edges.
+func TestRenderShopSmoke(t *testing.T) {
+	m := NewModel("smoke")
+	m.Loading = false
+	m.Cart[m.Coffees[0].ID] = &models.CartItem{CoffeeID: m.Coffees[0].ID, Coffee: m.Coffees[0], Quantity: 4}
+	m = m.updateLayout(100, 40)
+	m, _ = m.ShopSwitch()
+
+	out := m.renderString()
+	plain := ansiRE.ReplaceAllString(out, "")
+	t.Log("\n" + plain)
+
+	// Collect left/right border columns of every box-drawing row.
+	var lefts, rights []int
+	for _, line := range strings.Split(plain, "\n") {
+		runes := []rune(line)
+		first, last := -1, -1
+		for i, r := range runes {
+			if strings.ContainsRune("╭╮╰╯│", r) {
+				if first == -1 {
+					first = i
+				}
+				last = i
+			}
+		}
+		if first != -1 {
+			lefts = append(lefts, first)
+			rights = append(rights, last)
+		}
+	}
+	if len(lefts) == 0 {
+		t.Fatal("no box-drawing rows found")
+	}
+	for i := range lefts {
+		if lefts[i] != lefts[0] {
+			t.Errorf("left edge misaligned: row %d at col %d, expected %d", i, lefts[i], lefts[0])
+			break
+		}
+		if rights[i] != rights[0] {
+			t.Errorf("right edge misaligned: row %d at col %d, expected %d", i, rights[i], rights[0])
+			break
+		}
+	}
+}
+
+// TestRenderAccountSmoke verifies the account page boxes stay within the
+// header/footer chrome bounds. The detail area is unboxed, so inner boxes may
+// be narrower than the chrome but must never poke outside it.
+func TestRenderAccountSmoke(t *testing.T) {
+	m := NewModel("smoke")
+	m.Loading = false
+	m = m.updateLayout(100, 40)
+	m, _ = m.AccountSwitch()
+
+	plain := ansiRE.ReplaceAllString(m.renderString(), "")
+	t.Log("\n" + plain)
+
+	var lefts, rights []int
+	for _, line := range strings.Split(plain, "\n") {
+		runes := []rune(line)
+		first, last := -1, -1
+		for i, r := range runes {
+			if strings.ContainsRune("╭╮╰╯│", r) {
+				if first == -1 {
+					first = i
+				}
+				last = i
+			}
+		}
+		if first != -1 {
+			lefts = append(lefts, first)
+			rights = append(rights, last)
+		}
+	}
+	if len(lefts) == 0 {
+		t.Fatal("no box-drawing rows found")
+	}
+	// Row 0 is the header box: it defines the chrome bounds.
+	for i := range lefts {
+		if lefts[i] < lefts[0] || rights[i] > rights[0] {
+			t.Errorf("box outside chrome: row %d spans %d-%d, chrome is %d-%d",
+				i, lefts[i], rights[i], lefts[0], rights[0])
+			break
+		}
+	}
+}
+
+// TestRenderOrderWindowing verifies the windowed order list: whole cards
+// only, with ↑/↓ arrow rows marking hidden items.
+func TestRenderOrderWindowing(t *testing.T) {
+	m := NewModel("smoke")
+	m.Loading = false
+	m.OrdersLoaded = true
+	for i := 1; i <= 9; i++ {
+		m.Orders = append(m.Orders, models.Order{
+			ID:     uint(9000 + i),
+			Status: models.OrderStatusPaid,
+			Total:  1000 + i*100,
+		})
+	}
+	m = m.updateLayout(100, 40)
+	m, _ = m.AccountSwitch()
+
+	// Preview mode: window starts at the top, arrow only below.
+	plain := ansiRE.ReplaceAllString(m.renderString(), "")
+	t.Log("\n" + plain)
+	if !strings.Contains(plain, "↓ 4 more") {
+		t.Errorf("preview mode: expected '↓ 4 more' indicator")
+	}
+	if strings.Contains(plain, "↑") {
+		t.Errorf("preview mode: unexpected up arrow")
+	}
+
+	// Browse mode scrolled to the middle: arrows on both ends.
+	m.account.orderViewState = 1
+	m.account.orderCursor = 6
+	m = m.scrollToAccountDetailItem()
+	plain = ansiRE.ReplaceAllString(m.renderString(), "")
+	t.Log("\n" + plain)
+	if !strings.Contains(plain, "↑ 2 more") || !strings.Contains(plain, "↓ 2 more") {
+		t.Errorf("browse mode: expected '↑ 2 more' and '↓ 2 more' indicators")
+	}
+}
+
+// TestRenderCartSmoke verifies the cart page cards line up with the chrome.
+func TestRenderCartSmoke(t *testing.T) {
+	m := NewModel("smoke")
+	m.Loading = false
+	// Seed coffees carry no IDs, so assign them for distinct cart keys
+	for i := range m.Coffees {
+		m.Coffees[i].ID = uint(i + 1)
+	}
+	m.Cart[m.Coffees[0].ID] = &models.CartItem{CoffeeID: m.Coffees[0].ID, Coffee: m.Coffees[0], Quantity: 2}
+	m.Cart[m.Coffees[1].ID] = &models.CartItem{CoffeeID: m.Coffees[1].ID, Coffee: m.Coffees[1], Quantity: 1}
+	m = m.updateLayout(100, 40)
+	m, _ = m.CartSwitch()
+
+	plain := ansiRE.ReplaceAllString(m.renderString(), "")
+	t.Log("\n" + plain)
+
+	var lefts, rights []int
+	for _, line := range strings.Split(plain, "\n") {
+		runes := []rune(line)
+		first, last := -1, -1
+		for i, r := range runes {
+			if strings.ContainsRune("╭╮╰╯│", r) {
+				if first == -1 {
+					first = i
+				}
+				last = i
+			}
+		}
+		if first != -1 {
+			lefts = append(lefts, first)
+			rights = append(rights, last)
+		}
+	}
+	if len(lefts) == 0 {
+		t.Fatal("no box-drawing rows found")
+	}
+	// Every box row (header, cards, footer) must share the chrome edges.
+	for i := range lefts {
+		if lefts[i] != lefts[0] || rights[i] != rights[0] {
+			t.Errorf("box edge misaligned: row %d spans %d-%d, expected %d-%d",
+				i, lefts[i], rights[i], lefts[0], rights[0])
+			break
+		}
+	}
+}
+
+// TestRenderShopSmokeStacked prints the stacked (medium/small) layouts.
+func TestRenderShopSmokeStacked(t *testing.T) {
+	for _, size := range [][2]int{{60, 32}, {45, 30}} {
+		m := NewModel("smoke")
+		m.Loading = false
+		m = m.updateLayout(size[0], size[1])
+		m, _ = m.ShopSwitch()
+		t.Logf("--- %dx%d ---\n%s", size[0], size[1], ansiRE.ReplaceAllString(m.renderString(), ""))
+	}
+}

pkg/tui/shop.go

@@ -4,163 +4,173 @@ import (
 	"fmt"
 	"strings"
 
-	"charm.land/bubbles/v2/viewport"
 	tea "charm.land/bubbletea/v2"
 	"charm.land/lipgloss/v2"
 
 	"terminalShop/pkg/models"
 )
 
-func (m Model) calculateShopWidths() (int, int) {
-	menuWidth := 14
-	if len(m.Coffees) == 0 {
-		if m.size < large {
-			return m.widthContent, m.widthContent
-		}
-		return menuWidth, m.widthContent - menuWidth
-	}
-	for _, c := range m.Coffees {
-		if w := lipgloss.Width(c.Name); w > menuWidth {
-			menuWidth = w
-		}
-	}
-	if menuWidth > 0 {
-		menuWidth += 4
-	}
+const (
+	// shopBodyInnerHeight fixes the inner height of the shop body panels so
+	// the detail box never resizes with the description.
+	shopBodyInnerHeight = 13
+	// shopDescLines pins the description region to an exact line count.
+	shopDescLines = 3
+)
+
+// shopLayout returns the shared chrome widths, all derived from one content
+// width so the header, body panels, and footer line up exactly.
+// Math ported from the design prototype at ~/programming/test/shop.go:
+// menu(menuW+4) + gap(1) + detail(detailW+4) = contentW = wideW + 4.
+func (m Model) shopLayout() (contentW, menuW, detailW, wideW int) {
+	contentW = m.widthContent
+	contentW = min(contentW, 74)
+	wideW = contentW - 4
 	if m.size < large {
-		menuWidth = m.widthContent
+		// Stacked layout: both panels span the full content width.
+		return contentW, wideW, wideW, wideW
 	}
-	detailWidth := m.widthContent - menuWidth
-	if m.size < large {
-		detailWidth = m.widthContent
-	}
-	return menuWidth, detailWidth
+	menuW = 16
+	detailW = contentW - 25
+	return contentW, menuW, detailW, wideW
 }
 
-func (m Model) updateShopViewports() Model {
-	headerHeight := lipgloss.Height(m.BuildHeader())
-	footerHeight := lipgloss.Height(m.BuildFooter())
-	availableHeight := m.heightContainer - headerHeight - footerHeight
-
-	if len(m.Coffees) == 0 {
-		return m
+// roastLevel maps a roast type to a 1-5 intensity for the roast meter.
+// It is the fallback for products stored before the roast_level column existed.
+func roastLevel(roastType string) int {
+	rt := strings.ToLower(roastType)
+	switch {
+	case strings.Contains(rt, "dark"):
+		return 5
+	case strings.Contains(rt, "light"):
+		return 2
+	default:
+		return 3
 	}
-
-	menuWidth, detailWidth := m.calculateShopWidths()
-
-	if !m.shop.viewportsReady {
-		m.shop.menuViewport = newViewport(menuWidth, availableHeight)
-		m.shop.menuViewport.KeyMap = viewport.KeyMap{} // menu nav is manual
-		m.shop.detailViewport = newViewport(detailWidth, availableHeight)
-		m.shop.detailViewport.KeyMap = modifiedKeyMap
-		m.shop.viewportsReady = true
-	} else {
-		m.shop.menuViewport.SetWidth(menuWidth)
-		m.shop.menuViewport.SetHeight(availableHeight)
-		m.shop.detailViewport.SetWidth(detailWidth)
-		m.shop.detailViewport.SetHeight(availableHeight)
-	}
-	return m
 }
 
-func (m Model) getShopMenuContent() string {
-	menuWidth, _ := m.calculateShopWidths()
-
-	selectedColor := m.theme.Highlight()
-	if m.shop.selected >= 0 && m.shop.selected < len(m.Coffees) {
-		if c := m.Coffees[m.shop.selected].Color; c != "" {
-			selectedColor = lipgloss.Color(c)
-		}
+// clampLines pads or truncates rendered text to exactly n lines so regions
+// like the description never change the panel height.
+func clampLines(s string, n int) string {
+	lines := strings.Split(s, "\n")
+	if len(lines) > n {
+		lines = lines[:n]
 	}
-
-	var normal, highlighted lipgloss.Style
-	if m.size < large {
-		menuWidth = m.widthContent
-		normal = m.theme.TextBody().
-			Width(menuWidth - 1).Align(lipgloss.Center)
-		highlighted = m.theme.TextAccent().
-			Width(menuWidth - 1).Align(lipgloss.Center).
-			Background(selectedColor).Bold(true)
-	} else {
-		normal = m.theme.TextBody().
-			Width(menuWidth+2).Padding(0, 1)
-		highlighted = m.theme.TextAccent().
-			Width(menuWidth+2).Padding(0, 1).
-			Background(selectedColor).Bold(true)
+	for len(lines) < n {
+		lines = append(lines, "")
 	}
+	return strings.Join(lines, "\n")
+}
 
+// roastMeter renders the strength dots, e.g. ● ● ● ○ ○
+func roastMeter(n int) string {
+	n = max(0, min(n, 5))
+	on := lipgloss.NewStyle().Foreground(cGold).Render(strings.Repeat("● ", n))
+	off := pDim.Render(strings.Repeat("○ ", 5-n))
+	return strings.TrimRight(on+off, " ")
+}
+
+func (m Model) shopMenuContent(w int) string {
 	var b strings.Builder
 	for i, c := range m.Coffees {
 		if i == m.shop.selected {
-			b.WriteString(highlighted.Render(c.Name) + "\n")
+			b.WriteString(lipgloss.NewStyle().Width(w).
+				Background(lipgloss.Color(c.Color)).
+				Foreground(contrastColor(c.Color)).
+				Bold(true).
+				Render(" · " + c.Name))
 		} else {
-			b.WriteString(normal.Render(c.Name) + "\n")
+			dot := lipgloss.NewStyle().Foreground(lipgloss.Color(c.Color)).Render("·")
+			b.WriteString(lipgloss.NewStyle().Width(w).
+				Render(" " + dot + " " + pBody.Render(c.Name)))
+		}
+		if i < len(m.Coffees)-1 {
+			b.WriteString("\n")
 		}
 	}
-	return lipgloss.NewStyle().Padding(0, 1).Render(b.String())
+	return b.String()
 }
 
-func (m Model) getShopDetailContent() string {
-	if len(m.Coffees) == 0 {
-		return ""
-	}
+func (m Model) shopDetailContent(w int) string {
 	coffee := m.Coffees[m.shop.selected]
-	_, detailWidth := m.calculateShopWidths()
-	if m.size >= large {
-		detailWidth -= 2
-	}
-
 	quantity := 0
 	if item, exists := m.Cart[coffee.ID]; exists {
 		quantity = item.Quantity
 	}
 
-	detail := lipgloss.JoinVertical(lipgloss.Left,
-		m.theme.TextAccent().Bold(true).Render(coffee.Name),
-		m.theme.TextBody().Render(
-			fmt.Sprintf("%s | %doz | %s", coffee.RoastType, coffee.Ounces, coffee.BeanType),
-		),
+	name := pWht.Bold(true).Render(coffee.Name)
+
+	sep := pDim.Render(" · ")
+	spec := pBody.Render(strings.ToUpper(coffee.RoastType)) + sep +
+		pDim.Render(fmt.Sprintf("%dOZ", coffee.Ounces)) + sep +
+		pDim.Render(strings.ToUpper(coffee.BeanType))
+
+	level := coffee.RoastLevel
+	if level < 1 || level > 5 {
+		level = roastLevel(coffee.RoastType)
+	}
+	strength := pDim.Render("roast  ") + roastMeter(level)
+
+	price := lipgloss.NewStyle().Foreground(lipgloss.Color(coffee.Color)).Bold(true).
+		Render(fmt.Sprintf("$%d.%02d", coffee.Price/100, coffee.Price%100)) +
+		pDim.Render("  usd")
+
+	// Stock is not modeled in the backend yet, so the indicator is static.
+	stock := lipgloss.NewStyle().Foreground(cGreen).Render("● in stock")
+
+	desc := clampLines(pBody.Width(w).Render(coffee.Description), shopDescLines)
+
+	// stepper: git-diff coloring — red minus, green plus
+	minus := lipgloss.NewStyle().Foreground(cRed).Bold(true).Render("−")
+	plus := lipgloss.NewStyle().Foreground(cGreen).Bold(true).Render("+")
+	count := lipgloss.NewStyle().Foreground(cWhite).Bold(true).
+		Padding(0, 2).Render(fmt.Sprintf("%d", quantity))
+	stepper := pDim.Render("qty  ") + minus + count + plus
+
+	return lipgloss.JoinVertical(lipgloss.Left,
+		name,
+		spec,
+		strength,
 		"",
-		lipgloss.NewStyle().Foreground(lipgloss.Color(coffee.Color)).Bold(true).Render(
-			fmt.Sprintf("$%.2f", float64(coffee.Price)/100),
-		),
+		price+"    "+stock,
 		"",
-		m.theme.TextAccent().Width(detailWidth).Render(coffee.Description),
+		desc,
 		"",
-		fmt.Sprintf("-  %d  +", quantity),
+		stepper,
 	)
-	return lipgloss.NewStyle().Width(detailWidth).Render(detail)
 }
 
 func (m Model) ShopView() string {
-	if !m.shop.viewportsReady {
-		m = m.updateShopViewports()
-	}
 	if len(m.Coffees) == 0 {
 		return lipgloss.Place(m.widthContent, m.heightContainer,
 			lipgloss.Center, lipgloss.Center, "No products available.")
 	}
 
-	m.shop.menuViewport.SetContent(m.getShopMenuContent())
-	m.shop.detailViewport.SetContent(m.getShopDetailContent())
+	_, menuW, detailW, _ := m.shopLayout()
 
+	mc := m.shopMenuContent(menuW)
+	dc := m.shopDetailContent(detailW)
+
+	var body string
 	if m.size < large {
-		return lipgloss.JoinVertical(lipgloss.Top,
-			m.shop.menuViewport.View(),
-			m.shop.detailViewport.View(),
+		body = lipgloss.JoinVertical(lipgloss.Left,
+			panel(menuW, 0, mc),
+			panel(detailW, 0, dc),
+		)
+	} else {
+		bodyH := max(shopBodyInnerHeight, lipgloss.Height(mc), lipgloss.Height(dc))
+		body = lipgloss.JoinHorizontal(lipgloss.Top,
+			panel(menuW, bodyH, mc),
+			" ",
+			panel(detailW, bodyH, dc),
 		)
 	}
-	return lipgloss.JoinHorizontal(lipgloss.Top,
-		m.shop.menuViewport.View(),
-		"  ",
-		m.shop.detailViewport.View(),
-	)
+
+	// Blank rows separate the body from the header and footer boxes.
+	return "\n" + body + "\n"
 }
 
 func (m Model) ShopUpdate(msg tea.Msg) (Model, tea.Cmd) {
-	var cmd tea.Cmd
-	var cmds []tea.Cmd
-
 	if len(m.Coffees) == 0 {
 		return m, nil
 	}
@@ -197,16 +207,7 @@ func (m Model) ShopUpdate(msg tea.Msg) (Model, tea.Cmd) {
 		}
 	}
 
-	// Pass messages to the detail viewport so pgup/pgdn scroll works
-	m.shop.detailViewport, cmd = m.shop.detailViewport.Update(msg)
-	cmds = append(cmds, cmd)
-
-	if m.shop.viewportsReady {
-		m.shop.menuViewport.SetContent(m.getShopMenuContent())
-		m.shop.detailViewport.SetContent(m.getShopDetailContent())
-	}
-
-	return m, tea.Batch(cmds...)
+	return m, nil
 }
 
 func (m Model) shopMoveSelected(previous bool) Model {
@@ -216,18 +217,8 @@ func (m Model) shopMoveSelected(previous bool) Model {
 	} else {
 		next++
 	}
-	if next < 0 {
-		next = 0
-	}
-	if next >= len(m.Coffees) {
-		next = len(m.Coffees) - 1
-	}
+	next = max(next, 0)
+	next = min(next, len(m.Coffees)-1)
 	m.shop.selected = next
-
-	if m.shop.viewportsReady {
-		targetY := (m.shop.selected + 2) * 1
-		m.shop.menuViewport.SetYOffset(targetY - m.shop.menuViewport.Height()/2)
-		m.shop.detailViewport.GotoTop()
-	}
 	return m
 }

pkg/tui/styles.go

@@ -8,13 +8,13 @@ import (
 
 func (m Model) createBoxInner(content string, selected bool, position lipgloss.Position, paddingH int, paddingV int, totalWidth int) string {
 	padded := lipgloss.PlaceHorizontal(totalWidth, position, content)
-	base := m.theme.Base().Border(lipgloss.NormalBorder()).Width(totalWidth)
+	base := m.theme.Base().Border(lipgloss.RoundedBorder()).Width(totalWidth)
 
 	var style lipgloss.Style
 	if selected {
-		style = base.BorderForeground(m.theme.Highlight())
+		style = base.BorderForeground(cWhite)
 	} else {
-		style = base.BorderForeground(m.theme.Border())
+		style = base.BorderForeground(cLine)
 	}
 	return style.Padding(paddingV, paddingH).Render(padded)
 }

pkg/tui/theme/doc.go

@@ -0,0 +1,3 @@
+// Package theme keeps the colors and styles in one spot so the whole UI
+// looks like it was built by the same person.
+package theme

pkg/tui/update.go

@@ -16,8 +16,6 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		if tick.seq == m.resizeSeq {
 			m = m.updateLayout(m.pendingWidth, m.pendingHeight)
 			switch m.currentPage {
-			case shopPage:
-				m = m.updateShopViewports()
 			case cartPage:
 				m = m.updateCartViewport()
 			case shippingPage:

pkg/tui/views.go

@@ -62,7 +62,8 @@ func (m Model) renderString() string {
 	if breadcrumbs != "" {
 		breadcrumbsHeight = lipgloss.Height(breadcrumbs)
 	}
-	footerHeight := 1
+	footer := m.BuildFooter()
+	footerHeight := lipgloss.Height(footer)
 	marginTop := 1
 	marginBottom := 1
 	bufferSpace := 1
@@ -87,17 +88,15 @@ func (m Model) renderString() string {
 			errorStyle = errorStyle.Width(m.widthContent - 4)
 		}
 		errorBanner := errorStyle.Render(m.error.message)
-		content = errorBanner + "\n" + m.buildPageContent(availableContentHeight)
+		content = errorBanner + "\n" + m.buildPageContent()
 	} else if m.notice != nil {
 		noticeStyle := m.theme.TextSuccess().Border(lipgloss.NormalBorder()).BorderForeground(m.theme.Success()).Padding(0, 1).MarginBottom(1)
 		noticeBanner := noticeStyle.Render(m.notice.message)
-		content = noticeBanner + "\n" + m.buildPageContent(availableContentHeight)
+		content = noticeBanner + "\n" + m.buildPageContent()
 	} else {
-		content = m.buildPageContent(availableContentHeight)
+		content = m.buildPageContent()
 	}
 
-	footer := m.BuildFooter()
-
 	isViewportPage := m.currentPage == shopPage || m.currentPage == cartPage ||
 		m.currentPage == shippingPage || m.currentPage == paymentPage ||
 		m.currentPage == confirmPage || m.currentPage == accountPage
@@ -137,10 +136,10 @@ func (m Model) renderString() string {
 	)
 }
 
-func (m Model) buildPageContent(height int) string {
+func (m Model) buildPageContent() string {
 	switch m.currentPage {
 	case accountPage:
-		return m.BuildAccountView(height)
+		return m.BuildAccountView()
 	case shippingPage:
 		return m.ShippingPageView()
 	case paymentPage:

pkg/utils/doc.go

@@ -0,0 +1,3 @@
+// Package utils is the catch-all drawer for tiny HTTP helpers that didn't
+// earn a package of their own.
+package utils

pkg/validate/doc.go

@@ -0,0 +1,3 @@
+// Package validate gives user input a once-over before the rest of the app
+// trusts it.
+package validate