feat: add Watchdog recovery and drift rebuild workflows

src/routes/campaigns/[id]/+page.svelte

@@ -35,6 +35,7 @@
         servers: ServerRow[];
         files: FileRow[];
         events: ActivityEvent[];
+        watchdogIncidentId?: string | null;
     }
 
     let detail = $state<Detail | null>(null);
@@ -121,7 +122,9 @@
             {/snippet}
         </SectionHeader>
 
-        <section class="outcome" aria-label="Campaign outcome"><h2>{completed} / {detail.servers.length} servers activated{unresolved ? ` · ${unresolved} unresolved` : ''}</h2><p>Files are staged before activation. Servers restart when empty, then their health is verified.</p>{#if unresolved}<p>Review failed or waiting servers below. Diagnose connectivity or inspect startup logs from the affected row.</p>{:else}<p>Every recorded server completed activation.</p>{/if}</section>
+        <section class="outcome" aria-label="Campaign outcome"><h2>{completed} / {detail.servers.length} servers activated{unresolved ? ` · ${unresolved} unresolved` : ''}</h2><p>{detail.watchdogIncidentId ? 'Watchdog repairs drift by deleting the existing instance files and rebuilding with the latest promoted setup after verifying a safe server state.' : 'Files are staged before activation. Servers restart when empty, then their health is verified.'}</p>{#if unresolved}<p>Review failed or waiting servers below. Diagnose connectivity or inspect startup logs from the affected row.</p>{:else}<p>Every recorded server completed activation.</p>{/if}</section>
+
+        {#if detail.watchdogIncidentId}<p class="watchdog-source">Started by Watchdog · <a href={`/watchdog/${encodeURIComponent(detail.watchdogIncidentId)}`}>View incident and recovery history</a></p>{/if}
 
         <Card padding="lg">
             <div class="meta-grid">
@@ -204,6 +207,7 @@
 {/if}
 
 <style>
+    .watchdog-source { margin: 0; color: var(--text-secondary); font-size: var(--text-sm); }.watchdog-source a { color: var(--accent-primary-hover); }
     .outcome { padding: 20px; border: 1px solid var(--border-strong); border-radius: var(--radius-md); background: var(--surface); }.outcome h2 { font-size: 20px; margin: 0; }.outcome p { color: var(--text-secondary); line-height: 1.6; margin: 10px 0 0; }.srv-r a { color: var(--accent-primary-hover); font-size: 13px; }
     .page {
         display: flex;