diff --git a/apps/web/package.json b/apps/web/package.json
index cf78bf5..eb06d08 100644
--- a/apps/web/package.json
+++ b/apps/web/package.json
@@ -1,6 +1,6 @@
 {
   "name": "web",
-  "version": "0.0.0",
+  "version": "0.2.0",
   "private": true,
   "type": "module",
   "scripts": {
@@ -16,6 +16,7 @@
     "@batch-cooking/date-tools": "workspace:*",
     "@batch-cooking/shared": "workspace:*",
     "i18next": "^26.3.6",
+    "lucide-react": "^1.32.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-i18next": "^17.0.11",
diff --git a/apps/web/src/components/ui/Checkbox.tsx b/apps/web/src/components/ui/Checkbox.tsx
new file mode 100644
index 0000000..fbd6d9f
--- /dev/null
+++ b/apps/web/src/components/ui/Checkbox.tsx
@@ -0,0 +1,41 @@
+import type { ReactNode } from "react";
+
+/**
+ * The app-wide "selectable card" checkbox — see `global.scss`'s
+ * `label:has(> input[type="checkbox"])` rule for the actual look (hidden
+ * native input, a `.check-mark` that scales in, `is-selected` driving the
+ * tinted/bordered state). Factors out the JSX triplet (`label` → hidden
+ * `input` → `span.check-mark` → label text) that used to be duplicated
+ * across `AllergySelect`, `DietTagSelect`, `IngredientPicker`'s display
+ * menu, and `UserPreferencesPage`'s theme picker (see {@link RadioOption}
+ * for its `type="radio"` sibling) — one place to get the markup/a11y right
+ * instead of four.
+ *
+ * `is-selected` is applied in JS from the same `checked` boolean the caller
+ * already has, not derived via a CSS `:has(:checked)` chain — that turned
+ * out unreliable across browsers (see the callers this replaces for the
+ * original note).
+ *
+ * `className` is for the *container* layout only (grid item, flex-wrap
+ * chip, stacked list…) — the control's own look never varies, so there's
+ * no `variant` prop here.
+ */
+export function CheckboxOption({
+  checked,
+  onChange,
+  children,
+  className,
+}: {
+  checked: boolean;
+  onChange: (checked: boolean) => void;
+  children: ReactNode;
+  className?: string;
+}) {
+  return (
+    <label className={[className, checked && "is-selected"].filter(Boolean).join(" ")}>
+      <input type="checkbox" checked={checked} onChange={(e) => onChange(e.target.checked)} />
+      <span className="check-mark" aria-hidden="true" />
+      {children}
+    </label>
+  );
+}
diff --git a/apps/web/src/components/ui/Radio.tsx b/apps/web/src/components/ui/Radio.tsx
new file mode 100644
index 0000000..1a3e15f
--- /dev/null
+++ b/apps/web/src/components/ui/Radio.tsx
@@ -0,0 +1,38 @@
+import type { ReactNode } from "react";
+
+/**
+ * The `type="radio"` sibling of {@link CheckboxOption} — same "selectable
+ * card" markup/look (see `global.scss`'s `label:has(> input[...])` rule,
+ * shared by both), just a native radio input under the hood so a group of
+ * `RadioOption`s sharing `name` behaves as mutually exclusive (see
+ * `UserPreferencesPage`'s theme picker, the one caller so far).
+ */
+export function RadioOption<T extends string>({
+  name,
+  value,
+  checked,
+  onChange,
+  children,
+  className,
+}: {
+  name: string;
+  value: T;
+  checked: boolean;
+  onChange: (value: T) => void;
+  children: ReactNode;
+  className?: string;
+}) {
+  return (
+    <label className={[className, checked && "is-selected"].filter(Boolean).join(" ")}>
+      <input
+        type="radio"
+        name={name}
+        value={value}
+        checked={checked}
+        onChange={() => onChange(value)}
+      />
+      <span className="check-mark" aria-hidden="true" />
+      {children}
+    </label>
+  );
+}
diff --git a/apps/web/src/features/profile/AllergySelect.tsx b/apps/web/src/features/profile/AllergySelect.tsx
index 824b321..1782279 100644
--- a/apps/web/src/features/profile/AllergySelect.tsx
+++ b/apps/web/src/features/profile/AllergySelect.tsx
@@ -1,4 +1,5 @@
 import type { AllergyView } from "@batch-cooking/shared";
+import { CheckboxOption } from "../../components/ui/Checkbox";
 import "./profile-forms.scss";
 
 interface AllergySelectProps {
@@ -38,19 +39,14 @@ export function AllergySelect({ legend, allergies, value, onChange }: AllergySel
       {allergies.map((allergy) => {
         const checked = value.includes(allergy.id);
         return (
-          <label
+          <CheckboxOption
             key={allergy.id}
-            // `is-selected` (not a `:has(:checked)` CSS rule) drives the
-            // selected look — chaining `:has(...):has(:checked)` to react to
-            // a *state* change (rather than a DOM mutation) turned out to be
-            // unreliable, so this stays a plain, always-correct React class
-            // instead of relying on CSS to derive it.
-            className={`allergy-select__option${checked ? " is-selected" : ""}`}
+            checked={checked}
+            onChange={() => toggle(allergy.id)}
+            className="allergy-select__option"
           >
-            <input type="checkbox" checked={checked} onChange={() => toggle(allergy.id)} />
-            <span className="check-mark" aria-hidden="true" />
             {allergy.name}
-          </label>
+          </CheckboxOption>
         );
       })}
     </fieldset>
diff --git a/apps/web/src/features/recipes/DietTagSelect.tsx b/apps/web/src/features/recipes/DietTagSelect.tsx
index febbfff..6413e79 100644
--- a/apps/web/src/features/recipes/DietTagSelect.tsx
+++ b/apps/web/src/features/recipes/DietTagSelect.tsx
@@ -1,5 +1,6 @@
 import type { DietView } from "@batch-cooking/shared";
 import { useTranslation } from "react-i18next";
+import { CheckboxOption } from "../../components/ui/Checkbox";
 import "./recipes.scss";
 
 /**
@@ -29,11 +30,9 @@ export function DietTagSelect({
       {diets.map((diet) => {
         const checked = value.includes(diet.id);
         return (
-          <label key={diet.id} className={checked ? "is-selected" : undefined}>
-            <input type="checkbox" checked={checked} onChange={() => toggle(diet.id)} />
-            <span className="check-mark" aria-hidden="true" />
+          <CheckboxOption key={diet.id} checked={checked} onChange={() => toggle(diet.id)}>
             {diet.name}
-          </label>
+          </CheckboxOption>
         );
       })}
     </fieldset>
diff --git a/apps/web/src/features/recipes/FavoriteStarButton.tsx b/apps/web/src/features/recipes/FavoriteStarButton.tsx
index 9b9912f..638fc1d 100644
--- a/apps/web/src/features/recipes/FavoriteStarButton.tsx
+++ b/apps/web/src/features/recipes/FavoriteStarButton.tsx
@@ -52,7 +52,7 @@ export function FavoriteStarButton({
       disabled={isSaving}
       title={t(isFavorite ? "recipes.detail.unfavorite" : "recipes.detail.favorite")}
     >
-      <FavoriteIcon />
+      <FavoriteIcon aria-hidden="true" />
     </button>
   );
 }
diff --git a/apps/web/src/features/recipes/IngredientPicker.tsx b/apps/web/src/features/recipes/IngredientPicker.tsx
index 79c18fc..0fae139 100644
--- a/apps/web/src/features/recipes/IngredientPicker.tsx
+++ b/apps/web/src/features/recipes/IngredientPicker.tsx
@@ -7,6 +7,7 @@ import {
 } from "@batch-cooking/shared";
 import { useState } from "react";
 import { useTranslation } from "react-i18next";
+import { CheckboxOption } from "../../components/ui/Checkbox";
 import { SettingsIcon } from "../../layouts/nav-icons";
 import { AllergenBadges } from "./AllergenBadges";
 import { DietBadges } from "./DietBadges";
@@ -101,28 +102,16 @@ export function IngredientPicker({
             aria-expanded={isDisplayMenuOpen}
             title={t("recipes.form.displayOptions")}
           >
-            <SettingsIcon />
+            <SettingsIcon aria-hidden="true" />
           </button>
           {isDisplayMenuOpen && (
             <div className="ingredient-picker__display-menu">
-              <label className={showDiets ? "is-selected" : ""}>
-                <input
-                  type="checkbox"
-                  checked={showDiets}
-                  onChange={(e) => setShowDiets(e.target.checked)}
-                />
-                <span className="check-mark" aria-hidden="true" />
+              <CheckboxOption checked={showDiets} onChange={setShowDiets}>
                 {t("recipes.form.showDietsLabel")}
-              </label>
-              <label className={showAllergens ? "is-selected" : ""}>
-                <input
-                  type="checkbox"
-                  checked={showAllergens}
-                  onChange={(e) => setShowAllergens(e.target.checked)}
-                />
-                <span className="check-mark" aria-hidden="true" />
+              </CheckboxOption>
+              <CheckboxOption checked={showAllergens} onChange={setShowAllergens}>
                 {t("recipes.form.showAllergensLabel")}
-              </label>
+              </CheckboxOption>
             </div>
           )}
         </div>
diff --git a/apps/web/src/features/recipes/RecipeTabs.tsx b/apps/web/src/features/recipes/RecipeTabs.tsx
index 0a9788a..6826eba 100644
--- a/apps/web/src/features/recipes/RecipeTabs.tsx
+++ b/apps/web/src/features/recipes/RecipeTabs.tsx
@@ -1,10 +1,11 @@
 import type { RecipeTab } from "@batch-cooking/shared";
+import type { LucideIcon } from "lucide-react";
 import { useTranslation } from "react-i18next";
 import { AccountIcon, FavoriteIcon, HouseholdIcon, PublicIcon } from "../../layouts/nav-icons";
 import "./recipes.scss";
 
 /** Every functional tab, in display order, with its icon — reuses `AccountIcon`/`HouseholdIcon` from the sidebar's own icon set (see nav-icons.tsx) rather than a second "person"/"house" glyph. */
-const TABS: Array<{ value: RecipeTab; Icon: () => JSX.Element }> = [
+const TABS: Array<{ value: RecipeTab; Icon: LucideIcon }> = [
   { value: "favoris", Icon: FavoriteIcon },
   { value: "perso", Icon: AccountIcon },
   { value: "foyer", Icon: HouseholdIcon },
@@ -37,7 +38,7 @@ export function RecipeTabs({
           className={`recipe-tabs__tab${value === active ? " active" : ""}`}
           onClick={() => onChange(value)}
         >
-          <Icon />
+          <Icon aria-hidden="true" />
           {t(`recipes.tabs.${value}`)}
         </button>
       ))}
diff --git a/apps/web/src/layouts/AppLayout.scss b/apps/web/src/layouts/AppLayout.scss
index 0468431..a58c09b 100644
--- a/apps/web/src/layouts/AppLayout.scss
+++ b/apps/web/src/layouts/AppLayout.scss
@@ -237,6 +237,19 @@
     }
   }
 
+  // App version — a quiet diagnostic footnote below the account menu, not
+  // an interactive element (hence `aria-hidden` on the `<p>` in
+  // AppLayout.tsx). Hidden whenever space is at a premium — the icon-only
+  // rail and the mobile horizontal bar (see the `.collapsed` block and the
+  // `@media (max-width: 640px)` block below).
+  &__version {
+    margin: var(--space-xs) 0 0;
+    padding: 0 var(--space-sm);
+    font-size: var(--font-size-xs);
+    color: var(--color-text-muted);
+    text-align: center;
+  }
+
   // --- Collapsed (icon-only rail) state -----------------------------------
   // A single class toggle on the root element — every nested rule below
   // just hides labels/chevrons and re-centers icons via CSS, no child
@@ -282,6 +295,10 @@
       display: none;
     }
 
+    .app-sidebar__version {
+      display: none;
+    }
+
     // The popover would otherwise shrink to the icon rail's own width,
     // squashing "Mon compte"/"Se déconnecter" — give it a normal,
     // comfortable width instead, still anchored to the rail's left edge.
@@ -342,6 +359,11 @@
       display: none;
     }
 
+    // No room for this on a horizontal bar either.
+    &__version {
+      display: none;
+    }
+
     &__nav {
       flex: 1 1 auto;
       min-width: 0;
diff --git a/apps/web/src/layouts/AppLayout.tsx b/apps/web/src/layouts/AppLayout.tsx
index 8012f9a..664d5ea 100644
--- a/apps/web/src/layouts/AppLayout.tsx
+++ b/apps/web/src/layouts/AppLayout.tsx
@@ -85,7 +85,7 @@ export function AppLayout() {
             onClick={toggleCollapsed}
             title={t(isCollapsed ? "layout.sidebar.expand" : "layout.sidebar.collapse")}
           >
-            <ChevronLeftIcon />
+            <ChevronLeftIcon aria-hidden="true" />
           </button>
         </div>
 
@@ -102,7 +102,7 @@ export function AppLayout() {
               className={({ isActive }) => (isActive ? "active" : undefined)}
               title={t(`layout.nav.${key}`)}
             >
-              <Icon />
+              <Icon aria-hidden="true" />
               <span className="label">{t(`layout.nav.${key}`)}</span>
             </NavLink>
           ))}
@@ -110,6 +110,9 @@ export function AppLayout() {
 
         <SettingsMenu />
         <AccountMenu />
+        <p className="app-sidebar__version" aria-hidden="true">
+          v{__APP_VERSION__}
+        </p>
       </aside>
 
       <main className="app-content">
@@ -146,7 +149,7 @@ function SettingsMenu() {
         title={t("layout.settings.toggle")}
       >
         <span className="app-sidebar__settings-toggle-left">
-          <SettingsIcon />
+          <SettingsIcon aria-hidden="true" />
           <span className="label">{t("layout.settings.toggle")}</span>
         </span>
         <span className="chevron" aria-hidden="true">
@@ -163,7 +166,7 @@ function SettingsMenu() {
               className={({ isActive }) => (isActive ? "active" : undefined)}
               title={t(`layout.settings.nav.${key}`)}
             >
-              <Icon />
+              <Icon aria-hidden="true" />
               <span className="label">{t(`layout.settings.nav.${key}`)}</span>
             </NavLink>
           ))}
diff --git a/apps/web/src/layouts/nav-icons.tsx b/apps/web/src/layouts/nav-icons.tsx
index 90adceb..84d62b3 100644
--- a/apps/web/src/layouts/nav-icons.tsx
+++ b/apps/web/src/layouts/nav-icons.tsx
@@ -1,130 +1,27 @@
-import type { ReactNode } from "react";
-
-// Small, hand-drawn line-icon set for the sidebar nav (24×24 viewBox,
-// matches the reviewed mockup — see the plan/PR description) rather than
-// pulling in an icon library for a handful of glyphs. Sized entirely via
-// CSS (`.app-sidebar__nav svg` etc., see AppLayout.scss) — no width/height
-// attribute here, so the same markup works at any size the caller picks.
-// `aria-hidden` on every icon: each one is always paired with visible text
-// (the nav label, or a `title` tooltip when collapsed) that already
-// conveys the meaning — the icon itself is decorative.
-
-function Icon({ children }: { children: ReactNode }) {
-  return (
-    <svg
-      viewBox="0 0 24 24"
-      fill="none"
-      stroke="currentColor"
-      strokeWidth="2"
-      strokeLinecap="round"
-      strokeLinejoin="round"
-      aria-hidden="true"
-    >
-      {children}
-    </svg>
-  );
-}
-
-export function PlanningIcon() {
-  return (
-    <Icon>
-      <rect x="3" y="4" width="18" height="18" rx="2" />
-      <path d="M16 2v4M8 2v4M3 10h18" />
-    </Icon>
-  );
-}
-
-export function RecipesIcon() {
-  return (
-    <Icon>
-      <path d="M4 19.5A2.5 2.5 0 0 1 6.5 17H20" />
-      <path d="M6.5 2H20v20H6.5A2.5 2.5 0 0 1 4 19.5v-15A2.5 2.5 0 0 1 6.5 2z" />
-    </Icon>
-  );
-}
-
-export function ShoppingListIcon() {
-  return (
-    <Icon>
-      <circle cx="9" cy="21" r="1" />
-      <circle cx="20" cy="21" r="1" />
-      <path d="M1 1h4l2.68 13.39a2 2 0 0 0 2 1.61h9.72a2 2 0 0 0 2-1.61L23 6H6" />
-    </Icon>
-  );
-}
-
-export function SettingsIcon() {
-  return (
-    <Icon>
-      <circle cx="12" cy="12" r="3" />
-      <path d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 1 1-2.83 2.83l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-4 0v-.09A1.65 1.65 0 0 0 9 19.4a1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 1 1-2.83-2.83l.06-.06a1.65 1.65 0 0 0 .33-1.82 1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1 0-4h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 1 1 2.83-2.83l.06.06a1.65 1.65 0 0 0 1.82.33H9a1.65 1.65 0 0 0 1-1.51V3a2 2 0 0 1 4 0v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 1 1 2.83 2.83l-.06.06a1.65 1.65 0 0 0-.33 1.82V9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 0 1 0 4h-.09a1.65 1.65 0 0 0-1.51 1z" />
-    </Icon>
-  );
-}
-
-export function AccountIcon() {
-  return (
-    <Icon>
-      <path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2" />
-      <circle cx="12" cy="7" r="4" />
-    </Icon>
-  );
-}
-
-export function DietPreferencesIcon() {
-  return (
-    <Icon>
-      <path d="M11 20A7 7 0 0 1 9.8 6.1C15.5 5 17 4.48 19 2c1 2 2 4.18 2 8 0 5.5-4.78 10-10 10z" />
-      <path d="M2 21c0-3 1.85-5.36 5.08-6C9.5 14.52 12 13 13 12" />
-    </Icon>
-  );
-}
-
-export function HouseholdIcon() {
-  return (
-    <Icon>
-      <path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z" />
-      <path d="M9 22V12h6v10" />
-    </Icon>
-  );
-}
-
-export function UserPreferencesIcon() {
-  return (
-    <Icon>
-      <circle cx="13.5" cy="6.5" r=".5" />
-      <circle cx="17.5" cy="10.5" r=".5" />
-      <circle cx="8.5" cy="7.5" r=".5" />
-      <circle cx="6.5" cy="12.5" r=".5" />
-      <path d="M12 2C6.5 2 2 6.5 2 12s4.5 10 10 10c.9 0 1.5-.7 1.5-1.5 0-.4-.2-.8-.4-1.1-.2-.3-.4-.6-.4-1 0-.8.7-1.5 1.5-1.5H16c3.3 0 6-2.7 6-6 0-4.4-4-8-10-8z" />
-    </Icon>
-  );
-}
-
-export function ChevronLeftIcon() {
-  return (
-    <Icon>
-      <path d="M15 18l-6-6 6-6" />
-    </Icon>
-  );
-}
-
-/** Favorites — the recipe catalog's "Favoris" tab (`RecipeTabs`) and the recipe detail panel's favorite toggle (`FavoriteStarButton`). */
-export function FavoriteIcon() {
-  return (
-    <Icon>
-      <polygon points="12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2" />
-    </Icon>
-  );
-}
-
-/** Public recipes — the recipe catalog's "Publique" tab (`RecipeTabs`). */
-export function PublicIcon() {
-  return (
-    <Icon>
-      <circle cx="12" cy="12" r="10" />
-      <path d="M2 12h20" />
-      <path d="M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z" />
-    </Icon>
-  );
-}
+// Sidebar/nav icon set — thin, named re-exports of lucide-react glyphs
+// rather than importing `lucide-react` directly in every consumer. Keeps a
+// single place documenting "which glyph stands for which app concept"
+// (the mapping itself, decided once, isn't obvious from a bare `Settings`
+// or `Home` import) and keeps consumer diffs small if a glyph ever needs
+// to change. Previously a hand-drawn custom SVG set (24×24, stroke-based,
+// no fill) — lucide-react uses the same stroke-based "line icon" language
+// (default `strokeWidth={2}`, round caps/joins) so the switch is visually
+// a no-op, just swaps who draws the paths.
+//
+// Every one of these is always paired with visible text (the nav label, or
+// a `title` tooltip when the sidebar is collapsed) — purely decorative, so
+// every consumer passes `aria-hidden="true"` itself (unlike the old custom
+// `Icon` wrapper, lucide doesn't set this by default).
+export {
+  Calendar as PlanningIcon,
+  BookOpen as RecipesIcon,
+  ShoppingCart as ShoppingListIcon,
+  Settings as SettingsIcon,
+  User as AccountIcon,
+  Leaf as DietPreferencesIcon,
+  Home as HouseholdIcon,
+  Palette as UserPreferencesIcon,
+  ChevronLeft as ChevronLeftIcon,
+  Star as FavoriteIcon,
+  Globe as PublicIcon,
+} from "lucide-react";
diff --git a/apps/web/src/pages/settings/UserPreferencesPage.tsx b/apps/web/src/pages/settings/UserPreferencesPage.tsx
index fe50380..9ec0c27 100644
--- a/apps/web/src/pages/settings/UserPreferencesPage.tsx
+++ b/apps/web/src/pages/settings/UserPreferencesPage.tsx
@@ -2,6 +2,7 @@ import { ErrorCode, THEME_PREFERENCES, type ThemePreference } from "@batch-cooki
 import { useState } from "react";
 import { useTranslation } from "react-i18next";
 import { ApiError } from "../../api/client";
+import { RadioOption } from "../../components/ui/Radio";
 import { useTheme } from "../../features/theme/ThemeContext";
 import { errorMessageService } from "../../services/error-message.service";
 import "./settings-pages.scss";
@@ -46,23 +47,16 @@ export function UserPreferencesPage() {
           {THEME_PREFERENCES.map((option) => {
             const checked = theme === option;
             return (
-              <label
+              <RadioOption
                 key={option}
-                // `is-selected` (not a `:has(:checked)` CSS rule) drives the
-                // selected look — see AllergySelect.tsx for why this stays
-                // in JS rather than pure CSS.
-                className={`theme-select__option${checked ? " is-selected" : ""}`}
+                name="theme"
+                value={option}
+                checked={checked}
+                onChange={handleChange}
+                className="theme-select__option"
               >
-                <input
-                  type="radio"
-                  name="theme"
-                  value={option}
-                  checked={checked}
-                  onChange={() => handleChange(option)}
-                />
-                <span className="check-mark" aria-hidden="true" />
                 {t(`userPreferences.theme.${option}`)}
-              </label>
+              </RadioOption>
             );
           })}
         </fieldset>
diff --git a/apps/web/src/pages/settings/settings-pages.scss b/apps/web/src/pages/settings/settings-pages.scss
index 9717d4d..0dee2b4 100644
--- a/apps/web/src/pages/settings/settings-pages.scss
+++ b/apps/web/src/pages/settings/settings-pages.scss
@@ -127,7 +127,8 @@
 // visually distinct, consistent "danger" treatment wherever they appear.
 .settings-page__danger-zone {
   margin-top: var(--space-lg);
-  border-color: var(--color-error);
+  border: 1.5px solid var(--color-error);
+  background: color-mix(in srgb, var(--color-error) 8%, var(--color-surface));
 }
 
 .settings-page__danger-button {
diff --git a/apps/web/src/styles/global.scss b/apps/web/src/styles/global.scss
index 18ada73..dffae1e 100644
--- a/apps/web/src/styles/global.scss
+++ b/apps/web/src/styles/global.scss
@@ -60,15 +60,16 @@ h1 {
 // `display: none`) and the whole label row it lives in becomes the
 // interactive surface instead: a flat bordered box that fills in with a
 // tinted background + primary border once selected, with a checkmark
-// fading in on the trailing edge.
+// fading in on the leading edge.
 //
 // The base (unselected) look below is detected structurally with `:has()`
 // — safe, since "does this label contain a checkbox/radio" never changes
 // after mount. The *selected* look is instead driven by the `is-selected`
-// class each caller (AllergySelect.tsx, UserPreferencesPage.tsx) toggles
-// in JS from the same boolean it already passes to `checked` — chaining a
-// second `:has(:checked)` to react to that live state turned out to be
-// unreliable across browsers, so this only needs one always-true `:has()`.
+// class {@link CheckboxOption}/{@link RadioOption} (components/ui/) toggle
+// in JS from the same boolean their caller already passes to `checked` —
+// chaining a second `:has(:checked)` to react to that live state turned
+// out to be unreliable across browsers, so this only needs one
+// always-true `:has()`.
 //
 // Every checkbox/radio in the app goes through this one place (the allergy
 // grid, the theme picker, anywhere future) rather than each feature styling
@@ -126,15 +127,15 @@ input[type="radio"] {
   opacity: 0;
 }
 
-// The checkmark — a real element (see AllergySelect.tsx /
-// UserPreferencesPage.tsx) shown via the same `is-selected` class as the
-// label's own look above, not a separate CSS-only trigger. Scaled in from
-// nothing so toggling has a bit of motion. Same mark for both checkbox and
-// radio: one consistent "selected" language app-wide rather than a
-// checkmark here and a dot there.
+// The checkmark — a real element (see components/ui/Checkbox.tsx /
+// Radio.tsx) shown via the same `is-selected` class as the label's own
+// look above, not a separate CSS-only trigger. Scaled in from nothing so
+// toggling has a bit of motion. Same mark for both checkbox and radio: one
+// consistent "selected" language app-wide rather than a checkmark here and
+// a dot there. Sits first in the row (before the label text, per DOM
+// order) — a classic "control on the left" layout rather than trailing.
 .check-mark {
   flex: none;
-  margin-left: auto;
   width: 0.9rem;
   height: 0.9rem;
   background: var(--color-primary);
diff --git a/apps/web/src/vite-env.d.ts b/apps/web/src/vite-env.d.ts
new file mode 100644
index 0000000..132c95d
--- /dev/null
+++ b/apps/web/src/vite-env.d.ts
@@ -0,0 +1,5 @@
+/// <reference types="vite/client" />
+
+// Injected by `define` in vite.config.ts, sourced from package.json's
+// version field — see AppLayout.tsx for where it's rendered.
+declare const __APP_VERSION__: string;
diff --git a/apps/web/vite.config.ts b/apps/web/vite.config.ts
index a4886c6..fbd5fdc 100644
--- a/apps/web/vite.config.ts
+++ b/apps/web/vite.config.ts
@@ -1,6 +1,11 @@
+import { readFileSync } from "node:fs";
 import react from "@vitejs/plugin-react";
 import { defineConfig } from "vite";
 
+// Read once at config-eval time — cheaper than a plugin hook, and this file
+// only ever runs in Node (dev server / build), never bundled into the app.
+const pkg = JSON.parse(readFileSync(new URL("./package.json", import.meta.url), "utf-8"));
+
 export default defineConfig({
   plugins: [react()],
   css: {
@@ -13,4 +18,10 @@ export default defineConfig({
       },
     },
   },
+  // Exposes package.json's version as a compile-time constant — see
+  // src/vite-env.d.ts for the matching ambient declaration, and
+  // AppLayout.tsx for where it's rendered.
+  define: {
+    __APP_VERSION__: JSON.stringify(pkg.version),
+  },
 });
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a842ad5..88b6a91 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -99,6 +99,9 @@ importers:
       i18next:
         specifier: ^26.3.6
         version: 26.3.6(typescript@5.9.3)
+      lucide-react:
+        specifier: ^1.32.0
+        version: 1.32.0(react@18.3.1)
       react:
         specifier: ^18.3.1
         version: 18.3.1
@@ -2098,6 +2101,11 @@ packages:
   lru-cache@5.1.1:
     resolution: {integrity: sha512-KpNARQA3Iwv+jTA0utUVVbrh+Jlrr1Fv0e56GGzAFOXN7dk/FviaDW8LHmK52DlcH4WP2n6gI8vN1aesBFgo9w==, tarball: https://registry.npmjs.org/lru-cache/-/lru-cache-5.1.1.tgz}
 
+  lucide-react@1.32.0:
+    resolution: {integrity: sha512-txX56hMFnRxPi1f9/nH69YN8uvAO6a7Y1KSWKjCDAtdD9+soEgmWuCt6iRm1pkxUZo2+YntSdsE1L6bIuKoY8Q==, tarball: https://registry.npmjs.org/lucide-react/-/lucide-react-1.32.0.tgz}
+    peerDependencies:
+      react: ^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0
+
   luxon@3.7.2:
     resolution: {integrity: sha512-vtEhXh/gNjI9Yg1u4jX/0YVPMvxzHuGgCm6tC5kZyb08yjGWGnqAjGJvcXbqQR2P3MyMEFnRbpcdFS6PBcLqew==, tarball: https://registry.npmjs.org/luxon/-/luxon-3.7.2.tgz}
     engines: {node: '>=12'}
@@ -4764,6 +4772,10 @@ snapshots:
     dependencies:
       yallist: 3.1.1
 
+  lucide-react@1.32.0(react@18.3.1):
+    dependencies:
+      react: 18.3.1
+
   luxon@3.7.2: {}
 
   make-dir@3.1.0: