fix: clarify product and copy fields

apps/web/src/components/molecules/InventoryCopyStep.vue

@@ -23,6 +23,7 @@ defineEmits(['update:productId', 'update:conditionId', 'submit']);
       :value="productId"
       class="fixture-input"
       required
+      aria-describedby="inventory-product-help"
       @change="$emit('update:productId', $event.target.value)"
     >
       <option value="" disabled>Select a product</option>
@@ -30,12 +31,14 @@ defineEmits(['update:productId', 'update:conditionId', 'submit']);
         {{ product.name }}
       </option>
     </select>
+    <p id="inventory-product-help">Select the product represented by this physical copy.</p>
     <label class="fixture-label" for="inventory-condition">Condition</label>
     <select
       id="inventory-condition"
       :value="conditionId"
       class="fixture-input"
       required
+      aria-describedby="inventory-condition-help"
       @change="$emit('update:conditionId', $event.target.value)"
     >
       <option value="" disabled>Select a condition</option>
@@ -43,6 +46,7 @@ defineEmits(['update:productId', 'update:conditionId', 'submit']);
         {{ condition.name }} ({{ condition.code }})
       </option>
     </select>
+    <p id="inventory-condition-help">Choose the condition for this individual copy.</p>
     <button class="button button--primary" type="submit" :disabled="isSaving">
       Create physical copy
     </button>

apps/web/src/components/molecules/ProductIdentityStep.vue

@@ -22,14 +22,17 @@ defineEmits(['update:productName', 'update:categoryId', 'submit']);
       :value="productName"
       class="fixture-input"
       required
+      aria-describedby="product-name-help"
       @input="$emit('update:productName', $event.target.value)"
     />
+    <p id="product-name-help">Use the recognizable product name collectors will search for.</p>
     <label class="fixture-label" for="product-category">Category</label>
     <select
       id="product-category"
       :value="categoryId"
       class="fixture-input"
       required
+      aria-describedby="product-category-help"
       @change="$emit('update:categoryId', $event.target.value)"
     >
       <option value="" disabled>Select a category</option>
@@ -37,6 +40,7 @@ defineEmits(['update:productName', 'update:categoryId', 'submit']);
         {{ category.name }}
       </option>
     </select>
+    <p id="product-category-help">Choose the catalog category that defines valid conditions for this product.</p>
     <button class="button button--primary" type="submit" :disabled="isSaving">
       Create product
     </button>

docs/IMPLEMENTATION-STATUS.md

@@ -281,6 +281,7 @@ Remaining roadmap areas are approved external provider credentials/adapters, bro
 - Session-expired login messaging now has Storybook interaction coverage.
 - Admin sale and acquisition amount fields now expose explicit units and optional-field guidance through associated help text.
 - Provider mapping fields now explain Product versus Search identifiers, and pricing values expose their cents unit through associated help text.
+- Product identity and physical-copy selectors now include associated guidance describing the catalog and copy-level choices.
 
 ## Local Commands