Add application support teams with contacts

Replaces the legacy supportteams/appowners pair: supportteams
(teamname unique, teamurl ServiceNow link) + supportteamcontacts
(multiple named contacts with SSO per team, the people you reach out
to), applications.supportteamid intact. Migration 7d18 migrates each
legacy team owner into a contact, drops appowners, and has a validated
downgrade. New /api/supportteams CRUD (admin writes, import-mode
timestamps, teamname lookup), Support card on application detail,
contacts column on the list, and a settings management page.
IMPORT-API.md mapping updated to the concrete endpoints.

658 tests pass; live dev migration applied (24 teams / 24 contacts);
fresh-install and downgrade round-trips verified on scratch DBs.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/src/views/applications/ApplicationDetail.vue

@@ -48,26 +48,26 @@
       <div class="content-grid">
         <!-- Left Column -->
         <div class="content-column">
-          <!-- Support Info -->
+          <!-- Support -->
           <div class="section-card">
-            <h3 class="section-title">Support Information</h3>
+            <h3 class="section-title">Support</h3>
             <div class="info-list">
               <div class="info-row">
                 <span class="info-label">Support Team</span>
                 <span class="info-value">
-                  <a v-if="app.supportteam?.teamurl" :href="app.supportteam.teamurl" target="_blank">
-                    {{ app.supportteam?.teamname || '-' }}
+                  <a v-if="app.teamurl" :href="app.teamurl" target="_blank">
+                    {{ app.supportteamname || '-' }}
                   </a>
-                  <span v-else>{{ app.supportteam?.teamname || '-' }}</span>
+                  <span v-else>{{ app.supportteamname || '-' }}</span>
                 </span>
               </div>
-              <div class="info-row">
-                <span class="info-label">App Owner</span>
-                <span class="info-value">{{ app.supportteam?.owner?.appowner || '-' }}</span>
-              </div>
-              <div class="info-row" v-if="app.supportteam?.owner?.sso">
-                <span class="info-label">SSO</span>
-                <span class="info-value mono">{{ app.supportteam.owner.sso }}</span>
+              <div class="info-row" v-if="app.contacts && app.contacts.length">
+                <span class="info-label">Contacts</span>
+                <span class="info-value">
+                  <span v-for="(contact, index) in app.contacts" :key="index" class="contact-line">
+                    {{ contact.name }}<span v-if="contact.sso" class="mono"> ({{ contact.sso }})</span>
+                  </span>
+                </span>
               </div>
             </div>
           </div>
@@ -326,6 +326,11 @@ function handleImageError(e) {
   font-size: 1.125rem;
 }
 
+/* Support contacts stack one per line */
+.contact-line {
+  display: block;
+}
+
 /* Notes styling - rendered as escaped plain text, preserve author line breaks */
 .notes-text {
   white-space: pre-wrap;