frontend: Inventory "Add item" button + dialog

Add an Add-item button to the Inventory page that opens a COSS form dialog
(name required; form, strength, stock, reorder point, location, expiry). On
submit it persists via createInventory and prepends the saved row so it
appears immediately. Mirrors the appointments add-dialog pattern.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/components/pharmacy/add-inventory-dialog.tsx

@@ -0,0 +1,191 @@
+"use client";
+
+import { type FormEvent, type ReactNode, useState } from "react";
+import { useTranslation } from "react-i18next";
+
+import { Button } from "@/components/ui/button";
+import {
+  Dialog,
+  DialogClose,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogPanel,
+  DialogPopup,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { Input } from "@/components/ui/input";
+import type { InventoryInput } from "@/lib/inventory";
+import { notify } from "@/lib/toast";
+
+function Field({ label, children }: { label: string; children: ReactNode }) {
+  return (
+    <label className="flex flex-col gap-1.5">
+      <span className="text-muted-foreground text-xs">{label}</span>
+      {children}
+    </label>
+  );
+}
+
+// "Add item" dialog for the pharmacy inventory. Only the medication name is
+// required (matches the backend schema); the rest is optional descriptive +
+// stock detail. The new item is handed back via onAdd, which persists it
+// through the inventory API and prepends it to the page list.
+export function AddInventoryDialog({
+  open,
+  onOpenChange,
+  onAdd,
+}: {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  onAdd: (input: InventoryInput) => void;
+}) {
+  const { t } = useTranslation();
+  const [name, setName] = useState("");
+  const [form, setForm] = useState("");
+  const [strength, setStrength] = useState("");
+  const [unit, setUnit] = useState("");
+  const [stockQuantity, setStockQuantity] = useState("0");
+  const [reorderThreshold, setReorderThreshold] = useState("0");
+  const [location, setLocation] = useState("");
+  const [expiresAt, setExpiresAt] = useState("");
+
+  const reset = () => {
+    setName("");
+    setForm("");
+    setStrength("");
+    setUnit("");
+    setStockQuantity("0");
+    setReorderThreshold("0");
+    setLocation("");
+    setExpiresAt("");
+  };
+
+  const submit = (event: FormEvent) => {
+    event.preventDefault();
+    const trimmed = name.trim();
+    if (!trimmed) {
+      notify.error(
+        t("inventory.dialog.nameRequiredTitle"),
+        t("inventory.dialog.nameRequiredBody"),
+      );
+      return;
+    }
+    onAdd({
+      name: trimmed,
+      form: form.trim(),
+      strength: strength.trim(),
+      unit: unit.trim(),
+      stockQuantity: Number.parseInt(stockQuantity, 10) || 0,
+      reorderThreshold: Number.parseInt(reorderThreshold, 10) || 0,
+      location: location.trim(),
+      expiresAt: expiresAt || null,
+    });
+    notify.success(t("inventory.dialog.addedTitle"), trimmed);
+    reset();
+    onOpenChange(false);
+  };
+
+  return (
+    <Dialog
+      onOpenChange={(o) => {
+        onOpenChange(o);
+        if (!o) reset();
+      }}
+      open={open}
+    >
+      <DialogPopup className="sm:max-w-md">
+        <DialogHeader>
+          <DialogTitle>{t("inventory.dialog.title")}</DialogTitle>
+          <DialogDescription>
+            {t("inventory.dialog.description")}
+          </DialogDescription>
+        </DialogHeader>
+
+        <form className="contents" onSubmit={submit}>
+          <DialogPanel className="flex flex-col gap-4">
+            <Field label={t("inventory.dialog.name")}>
+              <Input
+                autoFocus
+                onChange={(event) => setName(event.target.value)}
+                placeholder={t("inventory.dialog.namePlaceholder")}
+                value={name}
+              />
+            </Field>
+
+            <div className="grid grid-cols-2 gap-3">
+              <Field label={t("inventory.dialog.form")}>
+                <Input
+                  onChange={(event) => setForm(event.target.value)}
+                  placeholder={t("inventory.dialog.formPlaceholder")}
+                  value={form}
+                />
+              </Field>
+              <Field label={t("inventory.dialog.strength")}>
+                <Input
+                  onChange={(event) => setStrength(event.target.value)}
+                  placeholder={t("inventory.dialog.strengthPlaceholder")}
+                  value={strength}
+                />
+              </Field>
+            </div>
+
+            <div className="grid grid-cols-3 gap-3">
+              <Field label={t("inventory.dialog.stock")}>
+                <Input
+                  inputMode="numeric"
+                  min={0}
+                  onChange={(event) => setStockQuantity(event.target.value)}
+                  type="number"
+                  value={stockQuantity}
+                />
+              </Field>
+              <Field label={t("inventory.dialog.unit")}>
+                <Input
+                  onChange={(event) => setUnit(event.target.value)}
+                  placeholder={t("inventory.dialog.unitPlaceholder")}
+                  value={unit}
+                />
+              </Field>
+              <Field label={t("inventory.dialog.reorder")}>
+                <Input
+                  inputMode="numeric"
+                  min={0}
+                  onChange={(event) => setReorderThreshold(event.target.value)}
+                  type="number"
+                  value={reorderThreshold}
+                />
+              </Field>
+            </div>
+
+            <div className="grid grid-cols-2 gap-3">
+              <Field label={t("inventory.dialog.location")}>
+                <Input
+                  onChange={(event) => setLocation(event.target.value)}
+                  placeholder={t("inventory.dialog.locationPlaceholder")}
+                  value={location}
+                />
+              </Field>
+              <Field label={t("inventory.dialog.expires")}>
+                <Input
+                  onChange={(event) => setExpiresAt(event.target.value)}
+                  type="date"
+                  value={expiresAt}
+                />
+              </Field>
+            </div>
+          </DialogPanel>
+
+          <DialogFooter>
+            <DialogClose render={<Button type="button" variant="outline" />}>
+              {t("inventory.dialog.cancel")}
+            </DialogClose>
+            <Button disabled={!name.trim()} type="submit">
+              {t("inventory.dialog.submit")}
+            </Button>
+          </DialogFooter>
+        </form>
+      </DialogPopup>
+    </Dialog>
+  );
+}

frontend/components/pharmacy/inventory-view.tsx

@@ -1,18 +1,23 @@
 "use client";
 
-import { AlertTriangle, Boxes, PackageX, Pill, Search } from "lucide-react";
+import { AlertTriangle, Boxes, PackageX, Pill, Plus, Search } from "lucide-react";
 import { useEffect, useMemo, useState } from "react";
 import { useTranslation } from "react-i18next";
 
+import { AddInventoryDialog } from "@/components/pharmacy/add-inventory-dialog";
 import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
 import { Card } from "@/components/ui/card";
 import { Input } from "@/components/ui/input";
 import {
   type Availability,
+  type InventoryInput,
   type InventoryItem,
   availabilityOf,
+  createInventory,
   listInventory,
 } from "@/lib/inventory";
+import { notify } from "@/lib/toast";
 
 const availabilityVariant: Record<
   Availability,
@@ -90,6 +95,20 @@ export function InventoryView() {
   const { t } = useTranslation();
   const [items, setItems] = useState<InventoryItem[]>([]);
   const [query, setQuery] = useState("");
+  const [addOpen, setAddOpen] = useState(false);
+
+  // Persist a new item, then prepend the saved record so it appears immediately.
+  const addItem = async (input: InventoryInput) => {
+    try {
+      const created = await createInventory(input);
+      setItems((prev) => [created, ...prev]);
+    } catch {
+      notify.error(
+        t("inventory.dialog.failedTitle"),
+        t("inventory.dialog.failedBody"),
+      );
+    }
+  };
 
   useEffect(() => {
     let active = true;
@@ -138,17 +157,29 @@ export function InventoryView() {
             {t("inventory.subtitle")}
           </p>
         </div>
-        <div className="relative">
-          <Search className="-translate-y-1/2 absolute top-1/2 left-3 size-4 text-muted-foreground" />
-          <Input
-            className="w-full pl-9 sm:w-64"
-            onChange={(event) => setQuery(event.target.value)}
-            placeholder={t("inventory.searchPlaceholder")}
-            value={query}
-          />
+        <div className="flex items-center gap-2">
+          <div className="relative">
+            <Search className="-translate-y-1/2 absolute top-1/2 left-3 size-4 text-muted-foreground" />
+            <Input
+              className="w-full pl-9 sm:w-64"
+              onChange={(event) => setQuery(event.target.value)}
+              placeholder={t("inventory.searchPlaceholder")}
+              value={query}
+            />
+          </div>
+          <Button onClick={() => setAddOpen(true)}>
+            <Plus className="size-4" />
+            {t("inventory.addItem")}
+          </Button>
         </div>
       </div>
 
+      <AddInventoryDialog
+        onAdd={addItem}
+        onOpenChange={setAddOpen}
+        open={addOpen}
+      />
+
       <div className="grid grid-cols-1 gap-4 sm:grid-cols-3">
         {kpis.map((k) => (
           <Kpi key={k.label} {...k} />