Move UI to BoardUI with slate + salmon theme; add PDF plan export

- Adopt BoardUI (Pro init): theme tokens, Inter, .dark mode, Button,
  SegmentedControl, Meter, Skeleton and ThemeToggle; remap the app's
  color aliases onto BoardUI tokens and swap lucide for Remix icons
- Retint BoardUI's neutral ramp to cool slate with a salmon accent;
  drop the dotted background; raise muted text contrast
- Simplify the landing page and remove the overlap explorer
- Planner: explicit "I have this" toggle on grocery lines, pantry panel
  above the menu with the staples list spelled out, sticky aisle
  header fix, and a "Download PDF" plan export (jsPDF, lazy-loaded)
- Recipes: replace the family cabbage soup with Cade's Cabbage Soup
  (adds Bone-In Ham Steak to the catalog); remove Ham, Bean & Cabbage Soup
- Remove unused BoardUI components, dependencies and exports

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/components/MealSelectorModal.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { ChevronDown, ChevronUp, Repeat2, Search, SlidersHorizontal, X } from "lucide-react";
+import { RiArrowDownSLine as ChevronDown, RiArrowUpSLine as ChevronUp, RiRepeat2Line as Repeat2, RiSearchLine as Search, RiEqualizerLine as SlidersHorizontal, RiCloseLine as X } from "@remixicon/react";
 import { useEffect, useMemo, useRef, useState } from "react";
 import { Cart } from "@/app/lib/grocery";
 import { CUISINES, DAY_NAMES, STYLES, activeRecipeIds, describeBlockers, mealKindFor, mealLabel, recipeBlockers, toggle } from "@/app/lib/plan";
@@ -10,6 +10,7 @@ import type { CookingStyle, Cuisine, MealPlanState, Recipe } from "@/app/types";
 import { Chip } from "./Chip";
 import { StyleIcon } from "./Icons";
 import { RecipeDetail } from "./RecipeDetail";
+import { Button } from "@/components/base/buttons/button";
 
 interface MealSelectorModalProps {
   slotKey: string | null;
@@ -37,7 +38,7 @@ export function MealSelectorModal({ slotKey, state, onPick, onClose }: MealSelec
       onClose={onClose}
       onClick={(e) => e.target === dialogRef.current && onClose()}
       aria-labelledby="selector-title"
-      className="m-0 mt-auto max-h-[90dvh] w-full max-w-none overflow-hidden rounded-t-2xl border border-line bg-surface p-0 shadow-2xl sm:m-auto sm:max-w-2xl sm:rounded-2xl"
+      className="m-0 mt-auto max-h-[90dvh] w-full max-w-none overflow-hidden rounded-t-3xl border border-line bg-surface p-0 shadow-2xl sm:m-auto sm:max-w-2xl sm:rounded-3xl"
     >
       {slotKey && <SelectorContent key={slotKey} slotKey={slotKey} state={state} onPick={onPick} onClose={onClose} />}
     </dialog>
@@ -278,13 +279,9 @@ function SelectorContent({
                 <div id={`recipe-${recipe.id}`} className="border-t border-line bg-canvas/50 px-3.5 py-4">
                   <RecipeDetail recipe={recipe} servings={state.householdSize} showMeta={false} compact />
                   {!disabled && (
-                    <button
-                      type="button"
-                      onClick={() => onPick(recipe.id)}
-                      className="trim-cap mt-4 min-h-10 w-full rounded-lg bg-brand-600 py-2 text-sm font-semibold text-on-accent transition-colors hover:bg-brand-500"
-                    >
+                    <Button className="mt-4 w-full" onClick={() => onPick(recipe.id)}>
                       Add to {DAY_NAMES[dayIndex]} {mealLabel(mealNumber).toLowerCase()}
-                    </button>
+                    </Button>
                   )}
                 </div>
               )}