Fix: offer validation prematurely closes dialog

- Transferred form validation error handling to an earlier step
- Added validation for negative input (similar to gifting forms)
- Switched amount input to component version for consistency

src/components/OfferDialog.vue

@@ -15,26 +15,25 @@ Raymer */
         class="block w-full rounded border border-slate-400 mb-2 px-3 py-2"
         placeholder="Description of what is offered"
       />
-      <div class="flex flex-row mt-2">
-        <span :class="unitCodeDisplayClasses" @click="changeUnitCode()">
-          {{ libsUtil.UNIT_SHORT[amountUnitCode] }}
-        </span>
-        <div
-          v-if="showDecrementButton"
-          :class="controlButtonClasses"
-          @click="decrement()"
-        >
-          <font-awesome icon="chevron-left" />
-        </div>
-        <input
-          v-model="amountInput"
+      <div class="flex mb-4">
+        <AmountInput
+          :value="parseFloat(amountInput) || 0"
+          :onUpdateValue="handleAmountUpdate"
           data-testId="inputOfferAmount"
-          type="number"
-          :class="amountInputClasses"
         />
-        <div :class="incrementButtonClasses" @click="increment()">
-          <font-awesome icon="chevron-right" />
-        </div>
+
+        <select
+          v-model="amountUnitCode"
+          class="flex-1 rounded border border-slate-400 ms-2 px-3 py-2"
+        >
+          <option
+            v-for="(displayName, code) in unitOptions"
+            :key="code"
+            :value="code"
+          >
+            {{ displayName }}
+          </option>
+        </select>
       </div>
       <div class="mt-4 flex justify-center">
         <span>
@@ -73,10 +72,15 @@ import {
   NOTIFY_OFFER_CREATION_ERROR,
   NOTIFY_OFFER_SUCCESS,
   NOTIFY_OFFER_SUBMISSION_ERROR,
+  NOTIFY_OFFER_ERROR_NEGATIVE_AMOUNT,
 } from "@/constants/notifications";
+import AmountInput from "./AmountInput.vue";
 
 @Component({
   mixins: [PlatformServiceMixin],
+  components: {
+    AmountInput,
+  },
 })
 export default class OfferDialog extends Vue {
   @Prop projectId?: string;
@@ -122,35 +126,10 @@ export default class OfferDialog extends Vue {
   }
 
   /**
-   * CSS classes for unit code selector and increment/decrement buttons
-   * Reduces template complexity for repeated border and styling patterns
-   */
-  get controlButtonClasses(): string {
-    return "border border-r-0 border-slate-400 bg-slate-200 px-4 py-2";
-  }
-
-  /**
-   * CSS classes for unit code display span
-   * Reduces template complexity for unit code button styling
+   * Computed property to get unit options for the select dropdown
    */
-  get unitCodeDisplayClasses(): string {
-    return "rounded-l border border-r-0 border-slate-400 bg-slate-200 w-1/3 text-center text-blue-500 px-2 py-2";
-  }
-
-  /**
-   * CSS classes for amount input field
-   * Reduces template complexity for input styling
-   */
-  get amountInputClasses(): string {
-    return "w-full border border-r-0 border-slate-400 px-2 py-2 text-center";
-  }
-
-  /**
-   * CSS classes for the right-most increment button
-   * Reduces template complexity for border styling
-   */
-  get incrementButtonClasses(): string {
-    return "rounded-r border border-slate-400 bg-slate-200 px-4 py-2";
+  get unitOptions() {
+    return this.libsUtil.UNIT_SHORT;
   }
 
   /**
@@ -173,13 +152,7 @@ export default class OfferDialog extends Vue {
     };
   }
 
-  /**
-   * Whether the decrement button should be visible
-   * Encapsulates conditional logic from template
-   */
-  get showDecrementButton(): boolean {
-    return this.amountInput !== "0";
-  }
+
 
   // =================================================
   // COMPONENT METHODS
@@ -226,30 +199,14 @@ export default class OfferDialog extends Vue {
     this.visible = false;
   }
 
-  /**
-   * Cycle through available unit codes
-   */
-  changeUnitCode() {
-    const units = Object.keys(this.libsUtil.UNIT_SHORT);
-    const index = units.indexOf(this.amountUnitCode);
-    this.amountUnitCode = units[(index + 1) % units.length];
-  }
 
-  /**
-   * Increment the amount input
-   */
-  increment() {
-    this.amountInput = `${(parseFloat(this.amountInput) || 0) + 1}`;
-  }
 
   /**
-   * Decrement the amount input
+   * Handle amount updates from AmountInput component
+   * @param value - New amount value
    */
-  decrement() {
-    this.amountInput = `${Math.max(
-      0,
-      (parseFloat(this.amountInput) || 1) - 1,
-    )}`;
+  handleAmountUpdate(value: number) {
+    this.amountInput = value.toString();
   }
 
   /**
@@ -273,6 +230,28 @@ export default class OfferDialog extends Vue {
    * Confirm and submit the offer
    */
   async confirm() {
+    if (!this.activeDid) {
+      this.notify.error(NOTIFY_OFFER_IDENTITY_REQUIRED.message, TIMEOUTS.LONG);
+      return;
+    }
+
+    if (parseFloat(this.amountInput) < 0) {
+      this.notify.error(
+        NOTIFY_OFFER_ERROR_NEGATIVE_AMOUNT.message,
+        TIMEOUTS.SHORT,
+      );
+      return;
+    }
+
+    if (!this.description && !parseFloat(this.amountInput)) {
+      const message = NOTIFY_OFFER_DESCRIPTION_REQUIRED.message.replace(
+        "{unit}",
+        this.libsUtil.UNIT_LONG[this.amountUnitCode],
+      );
+      this.notify.error(message, TIMEOUTS.SHORT);
+      return;
+    }
+
     this.close();
     this.notify.toast(NOTIFY_OFFER_RECORDING.text, undefined, TIMEOUTS.BRIEF);
 
@@ -301,20 +280,6 @@ export default class OfferDialog extends Vue {
     unitCode: string = "HUR",
     expirationDateInput?: string,
   ) {
-    if (!this.activeDid) {
-      this.notify.error(NOTIFY_OFFER_IDENTITY_REQUIRED.message, TIMEOUTS.LONG);
-      return;
-    }
-
-    if (!description && !amount) {
-      const message = NOTIFY_OFFER_DESCRIPTION_REQUIRED.message.replace(
-        "{unit}",
-        this.libsUtil.UNIT_LONG[unitCode],
-      );
-      this.notify.error(message, TIMEOUTS.MODAL);
-      return;
-    }
-
     try {
       const result = await createAndSubmitOffer(
         this.axios,
@@ -363,7 +328,7 @@ export default class OfferDialog extends Vue {
   display: flex;
   justify-content: center;
   align-items: center;
-  z-index: 1000;
+  z-index: 50;
 }
 
 .dialog {