[feat] save/remove inventory working now

src/components/CardGrid.astro

@@ -461,6 +461,91 @@ import BackToTop from "./BackToTop.astro"
   });
 
   const cardModal = document.getElementById('cardModal');
+
+  // ── Delegated submit handler for inventory form ──────────────────────────
+  cardModal.addEventListener('submit', async (e) => {
+    const form = e.target.closest('[data-inventory-form]');
+    if (!form) return;
+    e.preventDefault();
+
+    if (!form.checkValidity()) { form.classList.add('was-validated'); return; }
+
+    const cardId = form.closest('[data-card-id]')?.dataset.cardId;
+    if (!cardId) return;
+
+    const submitBtn = form.querySelector('button[type="submit"]');
+    if (submitBtn) { submitBtn.disabled = true; submitBtn.textContent = 'Saving…'; }
+
+    const body = new FormData(form);
+    body.append('action', 'add');
+    body.append('cardId', cardId);
+
+    try {
+      const res = await fetch('/api/inventory', { method: 'POST', body });
+      const html = await res.text();
+      const invList = document.getElementById('inventoryEntryList');
+      if (invList) invList.innerHTML = html || '';
+      form.reset();
+      form.classList.remove('was-validated');
+    } catch {
+      // keep current inventory list state
+    } finally {
+      if (submitBtn) { submitBtn.disabled = false; submitBtn.textContent = 'Save to inventory'; }
+    }
+  });
+
+  // ── Delegated click handler for inventory entry buttons ─────────────────
+  cardModal.addEventListener('click', async (e) => {
+    const btn = e.target.closest('[data-inv-action]');
+    if (!btn) return;
+
+    const article = btn.closest('[data-inventory-id]');
+    if (!article) return;
+
+    const action = btn.dataset.invAction;
+    const inventoryId = article.dataset.inventoryId;
+    const cardId = article.dataset.cardId;
+    const qtyEl = article.querySelector('[data-inv-qty]');
+    let qty = Number(qtyEl?.textContent) || 1;
+
+    if (action === 'increment') {
+      qtyEl.textContent = ++qty;
+      return;
+    }
+
+    if (action === 'decrement') {
+      if (qty > 1) qtyEl.textContent = --qty;
+      return;
+    }
+
+    // update or remove — POST to API and reload inventory list
+    btn.disabled = true;
+    const body = new FormData();
+    body.append('cardId', cardId);
+
+    if (action === 'update') {
+      body.append('action', 'update');
+      body.append('inventoryId', inventoryId);
+      body.append('quantity', String(qty));
+      body.append('purchasePrice', article.dataset.purchasePrice);
+      body.append('note', article.dataset.note || '');
+    } else if (action === 'remove') {
+      body.append('action', 'remove');
+      body.append('inventoryId', inventoryId);
+    }
+
+    try {
+      const res = await fetch('/api/inventory', { method: 'POST', body });
+      const html = await res.text();
+      const invList = document.getElementById('inventoryEntryList');
+      if (invList) invList.innerHTML = html || '';
+    } catch {
+      // keep current state
+    } finally {
+      btn.disabled = false;
+    }
+  });
+
   cardModal.addEventListener('shown.bs.modal', () => {
     updateNavButtons(cardModal);
     initChartAfterSwap(cardModal);