fix(ui): make all Jira and time panels read-only everywhere

WorklogTimeline: add readOnly prop — hides 'Log Time' button and form.
TestPhaseTimeline: remove 'Sync to Tempo' button from TempoSyncBadge;
  only displays the green 'Tempo' badge when already synced. Cleans up
  unused imports (useState, useMutation, useQueryClient, syncTestToTempo).
CampaignDetailPage: JiraLinkPanel and WorklogTimeline both now rendered
  with readOnly=true; JiraLinkPanel receives campaign name as label.

Jira tickets and time worklogs are created automatically by the system
(campaign activation, test workflow) — no manual editing from detail pages.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/pages/CampaignDetailPage.tsx

@@ -629,10 +629,10 @@ export default function CampaignDetailPage() {
         )}
       </div>
 
-      {/* Jira & Worklogs */}
+      {/* Jira & Worklogs — read-only, automatically managed */}
       <div className="grid gap-6 lg:grid-cols-2">
-        <JiraLinkPanel entityType="campaign" entityId={campaignId!} />
-        <WorklogTimeline entityType="campaign" entityId={campaignId!} />
+        <JiraLinkPanel entityType="campaign" entityId={campaignId!} readOnly label={campaign.name} />
+        <WorklogTimeline entityType="campaign" entityId={campaignId!} readOnly />
       </div>
 
       {/* Add Test to Campaign Modal */}