Address Gadfly review on #13: real bugs + dedupe page/picker

Correctness:
- PlantFormModal: validate days-to-maturity with Number() so "1.5" is rejected
  rather than silently truncated to 1 (parseInt). Accurate "at least 1 <unit>"
  spacing message; spacing input min now matches validation. Drop the icon
  maxLength that could split a multi-codepoint emoji (server caps at 32 bytes).
- PlantPicker: namespace row keys (recent- / all-) so a plant shown in both the
  Recent and All sections no longer collides on a duplicate React key.

Dedupe (the review's dominant, multi-model theme) — also sets up #15's reuse:
- lib/plants.ts: shared CategoryFilter type + filterPlants() helper.
- components/plants/CategoryChips.tsx and PlantIcon.tsx: extracted the chip row
  and the color-mix icon tile, now used by both the /plants page and PlantPicker
  (and PlantCard for the tile).

Skipped (cosmetic/cross-file, low agreement): conflictPlant→generic helper,
PlantCard vs GardenCard button-class dup, form component length, and localStorage
user-scoping (recent custom-plant ids don't resolve cross-user anyway).

tsc --noEmit clean; 20/20 vitest; production build green.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01JdQpdYYsTgtkJBxbcpAszi

web/src/components/plants/CategoryChips.tsx

@@ -0,0 +1,37 @@
+import { cn } from '@/lib/cn'
+import { CATEGORY_LABELS, PLANT_CATEGORIES, type CategoryFilter } from '@/lib/plants'
+
+/**
+ * Horizontal, scrollable "All + each category" chip row. Shared by the /plants
+ * page and the PlantPicker so both filter the catalog identically.
+ */
+export function CategoryChips({
+  value,
+  onChange,
+  size = 'md',
+}: {
+  value: CategoryFilter
+  onChange: (c: CategoryFilter) => void
+  size?: 'sm' | 'md'
+}) {
+  const chip = (v: CategoryFilter, label: string) => (
+    <button
+      key={v}
+      type="button"
+      onClick={() => onChange(v)}
+      className={cn(
+        'shrink-0 rounded-full px-3 font-medium transition-colors',
+        size === 'sm' ? 'py-1 text-xs' : 'py-1 text-sm',
+        value === v ? 'bg-accent text-accent-contrast' : 'bg-border/50 text-muted hover:text-fg',
+      )}
+    >
+      {label}
+    </button>
+  )
+  return (
+    <div className="flex gap-1.5 overflow-x-auto">
+      {chip('all', 'All')}
+      {PLANT_CATEGORIES.map((c) => chip(c, CATEGORY_LABELS[c]))}
+    </div>
+  )
+}

web/src/components/plants/PlantCard.tsx

@@ -1,3 +1,4 @@
+import { PlantIcon } from './PlantIcon'
 import { CATEGORY_LABELS, isBuiltin, type Plant } from '@/lib/plants'
 import { formatSpacing, type UnitPref } from '@/lib/units'
 
@@ -30,13 +31,7 @@ export function PlantCard({
   return (
     <div className="flex flex-col rounded-xl border border-border bg-surface">
       <div className="flex items-start gap-3 p-4">
-        <span
-          className="grid h-11 w-11 shrink-0 place-items-center rounded-lg text-2xl"
-          style={{ backgroundColor: `color-mix(in srgb, ${plant.color} 18%, transparent)` }}
-          aria-hidden
-        >
-          {plant.icon}
-        </span>
+        <PlantIcon color={plant.color} icon={plant.icon} className="h-11 w-11 rounded-lg text-2xl" />
         <div className="min-w-0 flex-1">
           <div className="flex items-center gap-2">
             <h3 className="truncate font-semibold text-fg">{plant.name}</h3>

web/src/components/plants/PlantFormModal.tsx

@@ -65,6 +65,7 @@ export function PlantFormModal({
   const [version, setVersion] = useState(plant?.version ?? 0)
   const [conflict, setConflict] = useState<string | null>(null)
   const [formError, setFormError] = useState<string | null>(null)
+  const unitLabel = spacingUnitLabel(unit)
 
   async function onSubmit(e: FormEvent) {
     e.preventDefault()
@@ -81,12 +82,13 @@ export function PlantFormModal({
     }
     const spacingCm = cmFromSpacing(parseFloat(spacing), unit)
     if (!Number.isFinite(spacingCm) || spacingCm < 1) {
-      setFormError('Spacing must be a positive number.')
+      setFormError(`Spacing must be at least 1 ${unitLabel}.`)
       return
     }
     let daysToMaturity: number | null = null
     if (days.trim()) {
-      const d = parseInt(days, 10)
+      // Number() (not parseInt) so "1.5" is rejected, not silently truncated to 1.
+      const d = Number(days)
       if (!Number.isInteger(d) || d < 1) {
         setFormError('Days to maturity must be a whole number of days, or left blank.')
         return
@@ -131,8 +133,6 @@ export function PlantFormModal({
     }
   }
 
-  const unitLabel = spacingUnitLabel(unit)
-
   return (
     <Modal title={isEdit ? 'Edit plant' : 'New plant'} onClose={onClose} busy={pending}>
       <form onSubmit={onSubmit} className="flex flex-col gap-3">
@@ -154,7 +154,7 @@ export function PlantFormModal({
             type="number"
             inputMode="decimal"
             step="any"
-            min="0"
+            min="1"
             required
             value={spacing}
             onChange={(e) => setSpacing(e.target.value)}
@@ -178,7 +178,6 @@ export function PlantFormModal({
             label="Icon (emoji)"
             name="icon"
             value={icon}
-            maxLength={8}
             onChange={(e) => setIcon(e.target.value)}
             hint="A single emoji, e.g. 🍅"
           />

web/src/components/plants/PlantIcon.tsx

@@ -0,0 +1,18 @@
+import { cn } from '@/lib/cn'
+
+/**
+ * A plant's emoji on a tile tinted with its own color (via color-mix, so any
+ * valid CSS color works). Shared by PlantCard and the PlantPicker rows. Size and
+ * shape come from `className`.
+ */
+export function PlantIcon({ color, icon, className }: { color: string; icon: string; className?: string }) {
+  return (
+    <span
+      className={cn('grid shrink-0 place-items-center', className)}
+      style={{ backgroundColor: `color-mix(in srgb, ${color} 18%, transparent)` }}
+      aria-hidden
+    >
+      {icon}
+    </span>
+  )
+}

web/src/editor/PlantPicker.tsx

@@ -1,7 +1,9 @@
 import { useEffect, useMemo, useRef, useState } from 'react'
 import { cn } from '@/lib/cn'
 import { fieldControlClass } from '@/components/ui/field'
-import { CATEGORY_LABELS, PLANT_CATEGORIES, usePlants, type Plant, type PlantCategory } from '@/lib/plants'
+import { CategoryChips } from '@/components/plants/CategoryChips'
+import { PlantIcon } from '@/components/plants/PlantIcon'
+import { CATEGORY_LABELS, filterPlants, usePlants, type CategoryFilter, type Plant } from '@/lib/plants'
 import { formatSpacing, type UnitPref } from '@/lib/units'
 
 const RECENT_KEY = 'pansy:recent-plants'
@@ -28,8 +30,6 @@ function recordRecent(id: number): number[] {
   return next
 }
 
-type CategoryFilter = PlantCategory | 'all'
-
 /**
  * Reusable plant chooser: a search-first list with a recently-used shortcut and
  * category filter, rendered as a bottom sheet on mobile / centered panel on
@@ -64,12 +64,7 @@ export function PlantPicker({
 
   const all = useMemo(() => plants.data ?? [], [plants.data])
 
-  const filtered = useMemo(() => {
-    const q = query.trim().toLowerCase()
-    return all.filter(
-      (p) => (category === 'all' || p.category === category) && (q === '' || p.name.toLowerCase().includes(q)),
-    )
-  }, [all, query, category])
+  const filtered = useMemo(() => filterPlants(all, query, category), [all, query, category])
 
   // Recents show only when not actively searching, and only rows still present.
   const recentPlants = useMemo(() => {
@@ -83,20 +78,16 @@ export function PlantPicker({
     onSelect(p)
   }
 
-  const row = (p: Plant) => (
+  // A plant option row. keyPrefix namespaces the key so a plant appearing in
+  // both the Recent and All sections doesn't collide on a duplicate React key.
+  const row = (p: Plant, keyPrefix: string) => (
     <button
-      key={p.id}
+      key={`${keyPrefix}-${p.id}`}
       type="button"
       onClick={() => choose(p)}
       className="flex w-full items-center gap-3 rounded-lg px-3 py-2.5 text-left outline-none transition-colors hover:bg-border/50 focus-visible:bg-border/50"
     >
-      <span
-        className="grid h-9 w-9 shrink-0 place-items-center rounded-md text-xl"
-        style={{ backgroundColor: `color-mix(in srgb, ${p.color} 18%, transparent)` }}
-        aria-hidden
-      >
-        {p.icon}
-      </span>
+      <PlantIcon color={p.color} icon={p.icon} className="h-9 w-9 rounded-md text-xl" />
       <span className="min-w-0 flex-1">
         <span className="block truncate font-medium text-fg">{p.name}</span>
         <span className="block text-xs text-muted">
@@ -106,20 +97,6 @@ export function PlantPicker({
     </button>
   )
 
-  const chip = (value: CategoryFilter, label: string) => (
-    <button
-      key={value}
-      type="button"
-      onClick={() => setCategory(value)}
-      className={cn(
-        'shrink-0 rounded-full px-3 py-1 text-xs font-medium transition-colors',
-        category === value ? 'bg-accent text-accent-contrast' : 'bg-border/50 text-muted hover:text-fg',
-      )}
-    >
-      {label}
-    </button>
-  )
-
   return (
     <div
       className="fixed inset-0 z-50 flex items-end justify-center bg-black/40 sm:items-center sm:p-4"
@@ -151,9 +128,8 @@ export function PlantPicker({
           </button>
         </div>
 
-        <div className="flex gap-1.5 overflow-x-auto border-b border-border px-3 py-2">
-          {chip('all', 'All')}
-          {PLANT_CATEGORIES.map((c) => chip(c, CATEGORY_LABELS[c]))}
+        <div className="border-b border-border px-3 py-2">
+          <CategoryChips value={category} onChange={setCategory} size="sm" />
         </div>
 
         <div className="min-h-0 flex-1 overflow-y-auto p-2">
@@ -163,12 +139,12 @@ export function PlantPicker({
           {recentPlants.length > 0 && (
             <>
               <p className="px-3 pb-1 pt-2 text-xs font-semibold uppercase tracking-wide text-muted">Recent</p>
-              {recentPlants.map(row)}
+              {recentPlants.map((p) => row(p, 'recent'))}
               <p className="px-3 pb-1 pt-3 text-xs font-semibold uppercase tracking-wide text-muted">All plants</p>
             </>
           )}
 
-          {filtered.map(row)}
+          {filtered.map((p) => row(p, 'all'))}
 
           {plants.isSuccess && filtered.length === 0 && (
             <p className="p-4 text-sm text-muted">No plants match your search.</p>

web/src/lib/plants.ts

@@ -43,6 +43,20 @@ export function isBuiltin(p: Plant): boolean {
   return p.ownerId == null
 }
 
+/** Category filter value: a specific category, or 'all'. Shared by the catalog
+ *  page and the PlantPicker so their chip rows and filtering stay in sync. */
+export type CategoryFilter = PlantCategory | 'all'
+
+/** Filter a plant list by a name query (case-insensitive substring) and
+ *  category. The single source of truth for both the /plants grid and the
+ *  PlantPicker list. */
+export function filterPlants(plants: Plant[], query: string, category: CategoryFilter): Plant[] {
+  const q = query.trim().toLowerCase()
+  return plants.filter(
+    (p) => (category === 'all' || p.category === category) && (q === '' || p.name.toLowerCase().includes(q)),
+  )
+}
+
 const plantsKey = ['plants'] as const
 
 export const plantsQueryOptions = queryOptions({

web/src/pages/PlantsPage.tsx

@@ -1,18 +1,16 @@
 import { useMemo, useState } from 'react'
 import { Alert } from '@/components/ui/Alert'
 import { Button } from '@/components/ui/Button'
-import { cn } from '@/lib/cn'
 import { fieldControlClass } from '@/components/ui/field'
 import { toast } from '@/components/ui/toast'
+import { CategoryChips } from '@/components/plants/CategoryChips'
 import { PlantCard } from '@/components/plants/PlantCard'
 import { PlantFormModal } from '@/components/plants/PlantFormModal'
 import { DeletePlantModal } from '@/components/plants/DeletePlantModal'
 import { PlantPicker } from '@/editor/PlantPicker'
-import { CATEGORY_LABELS, PLANT_CATEGORIES, usePlants, type Plant, type PlantCategory } from '@/lib/plants'
+import { filterPlants, usePlants, type CategoryFilter, type Plant } from '@/lib/plants'
 import type { UnitPref } from '@/lib/units'
 
-type CategoryFilter = PlantCategory | 'all'
-
 // Which modal is open, if any. edit/duplicate/delete carry the target plant.
 type Dialog =
   | { kind: 'create' }
@@ -54,26 +52,7 @@ export function PlantsPage() {
   }
 
   const all = useMemo(() => plants.data ?? [], [plants.data])
-  const filtered = useMemo(() => {
-    const q = query.trim().toLowerCase()
-    return all.filter(
-      (p) => (category === 'all' || p.category === category) && (q === '' || p.name.toLowerCase().includes(q)),
-    )
-  }, [all, query, category])
-
-  const chip = (value: CategoryFilter, label: string) => (
-    <button
-      key={value}
-      type="button"
-      onClick={() => setCategory(value)}
-      className={cn(
-        'shrink-0 rounded-full px-3 py-1 text-sm font-medium transition-colors',
-        category === value ? 'bg-accent text-accent-contrast' : 'bg-border/50 text-muted hover:text-fg',
-      )}
-    >
-      {label}
-    </button>
-  )
+  const filtered = useMemo(() => filterPlants(all, query, category), [all, query, category])
 
   return (
     <section>
@@ -104,9 +83,8 @@ export function PlantsPage() {
           aria-label="Search plants"
           className={fieldControlClass}
         />
-        <div className="flex gap-1.5 overflow-x-auto pb-1">
-          {chip('all', 'All')}
-          {PLANT_CATEGORIES.map((c) => chip(c, CATEGORY_LABELS[c]))}
+        <div className="pb-1">
+          <CategoryChips value={category} onChange={setCategory} />
         </div>
       </div>