PCs: identify by hostname/serial, drop the PC Number field

PCs are identified by hostname (the primary identifier) with serial as the
fallback; the assetnumber is seeded from hostname rather than a separate
"PC Number" field. PC list shows Hostname/Serial (Asset Tag column removed),
PC detail title leads with hostname.

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

frontend/src/views/pcs/PCDetail.vue

@@ -15,7 +15,7 @@
       <div class="hero-card">
         <div class="hero-content">
           <div class="hero-title">
-            <h1>{{ computer.assetnumber }}</h1>
+            <h1>{{ computer.computer?.hostname || computer.serialnumber || computer.assetnumber }}</h1>
             <span v-if="identifierflags.fqdn && computer.computer?.hostname" class="hero-alias">{{ computer.computer.hostname }}</span>
           </div>
           <div class="hero-meta">

frontend/src/views/pcs/PCForm.vue

@@ -10,36 +10,15 @@
       <form v-else @submit.prevent="savePC">
         <div class="form-row">
           <div class="form-group">
-            <label for="machinenumber">PC Number *</label>
-            <input
-              id="machinenumber"
-              v-model="form.machinenumber"
-              type="text"
-              class="form-control"
-              required
-            />
-          </div>
-
-          <div class="form-group">
-            <label for="alias">Alias</label>
-            <input
-              id="alias"
-              v-model="form.alias"
-              type="text"
-              class="form-control"
-            />
-          </div>
-        </div>
-
-        <div class="form-row">
-          <div class="form-group" v-if="identifierflags.fqdn">
-            <label for="hostname">Hostname</label>
+            <label for="hostname">Hostname *</label>
             <input
               id="hostname"
               v-model="form.hostname"
               type="text"
               class="form-control"
+              required
             />
+            <small class="form-hint">Primary identifier for the PC</small>
           </div>
 
           <div class="form-group">
@@ -53,6 +32,18 @@
           </div>
         </div>
 
+        <div class="form-row">
+          <div class="form-group">
+            <label for="alias">Alias</label>
+            <input
+              id="alias"
+              v-model="form.alias"
+              type="text"
+              class="form-control"
+            />
+          </div>
+        </div>
+
         <div class="form-row">
           <div class="form-group">
             <label for="machinetypeid">PC Type *</label>
@@ -402,9 +393,10 @@ async function savePC() {
 
   try {
     // One payload for the computers plugin (asset core + computer extension +
-    // primary IP). "PC Number" is the business identifier (assetnumber).
+    // primary IP). PCs are identified by hostname (fall back to serial), which
+    // also seeds the required unique assetnumber.
     const payload = {
-      assetnumber: form.value.machinenumber,
+      assetnumber: form.value.hostname || form.value.serialnumber,
       hostname: form.value.hostname || null,
       serialnumber: form.value.serialnumber || null,
       computertypeid: form.value.machinetypeid || null,

frontend/src/views/pcs/PCsList.vue

@@ -24,7 +24,6 @@
           <table>
             <thead>
               <tr>
-                <th>Asset Tag</th>
                 <th>Hostname</th>
                 <th>Serial Number</th>
                 <th>Type</th>
@@ -36,7 +35,6 @@
             </thead>
             <tbody>
               <tr v-for="item in computers" :key="item.assetid">
-                <td>{{ item.assetnumber }}</td>
                 <td>{{ item.computer?.hostname || '-' }}</td>
                 <td class="mono">{{ item.serialnumber || '-' }}</td>
                 <td>{{ item.computer?.computertypename || '-' }}</td>
@@ -61,7 +59,7 @@
                 </td>
               </tr>
               <tr v-if="computers.length === 0">
-                <td colspan="8" style="text-align: center; color: var(--text-light);">
+                <td colspan="7" style="text-align: center; color: var(--text-light);">
                   No computers found
                 </td>
               </tr>