(ui) Remove legacy-facing labels from operator pages

Replace refactor-era wording such as Source, Source root, SQL records,
database, runtime, and Django generation labels with operator-facing copy
around backup source, tracking records, changelog files, active config, and
pobsync-managed SSH keys.

Add view assertions so the old source/SQL labels do not quietly return.

Refs #24

src/pobsync_backend/tests/test_views.py

@@ -59,6 +59,8 @@ class ViewTests(TestCase):
 
         self.assertEqual(response.status_code, 200)
         self.assertContains(response, "Installed version:")
+        self.assertContains(response, "Changelog file:")
+        self.assertNotContains(response, "Source:")
         self.assertContains(response, "1.0.0 - 2026-05-21")
         self.assertContains(response, "Django control panel")
         self.assertContains(response, "Native systemd installer")
@@ -868,6 +870,8 @@ class ViewTests(TestCase):
 
         self.assertEqual(response.status_code, 200)
         self.assertContains(response, "Effective Config")
+        self.assertContains(response, "Backup source:")
+        self.assertNotContains(response, "Source root:")
         self.assertContains(response, "root@web-01.example.test:2222")
         self.assertContains(response, "default-key")
         self.assertContains(response, "-oBatchMode=yes")
@@ -1426,6 +1430,7 @@ class ViewTests(TestCase):
         self.assertContains(response, "Check network connectivity.")
         self.assertContains(response, "Retention")
         self.assertContains(response, "Planned deletions")
+        self.assertNotContains(response, "Source:</strong> sql")
         self.assertContains(response, "Max delete")
         self.assertContains(response, "Protect bases")
         self.assertContains(response, "Incomplete ignored")
@@ -1616,6 +1621,10 @@ class ViewTests(TestCase):
         self.assertContains(response, "Files seen:</strong> 100")
         self.assertContains(response, "Hardlinked files:</strong> 9")
         self.assertContains(response, "Restore Guidance")
+        self.assertContains(response, "Snapshot data path:")
+        self.assertNotContains(response, "Snapshot data source:")
+        self.assertContains(response, "Dry-run restore back to the original host:")
+        self.assertNotContains(response, "Dry-run restore back to the source host:")
         self.assertContains(response, f"{base.path}/data")
         self.assertContains(response, f"/restore/{host.host}")
         self.assertContains(response, "rsync -aHAX --numeric-ids --info=progress2 --dry-run")
@@ -1694,6 +1703,7 @@ class ViewTests(TestCase):
         self.assertContains(response, "newest")
         self.assertContains(response, "Would Delete")
         self.assertContains(response, "outside retention policy")
+        self.assertNotContains(response, "<div class=\"label\">Source</div>", html=True)
         self.assertContains(response, "Confirm delete count")
         self.assertContains(response, "Type 1 to confirm the current number of planned deletions.")