P2R-02 follow-up: Run-now works on disabled schedules with confirm

Surface the Run-now button on every schedule when the host is online,
not just enabled ones. Disabled rows render the button as a non-primary
style + a HX-confirm dialog ("This schedule is paused — running it now
won't change that. Fire it once anyway?"); enabled rows keep the
zero-friction primary button.

Server-side, Run-now no longer short-circuits on !Enabled — it
dispatches the source groups inline rather than via dispatchScheduledJob
(which always bails on disabled schedules, since cron-tick semantics
are different from explicit operator intent). The audit-log entry
inside dispatchBackupForGroup still records every fire.

web/templates/pages/host_schedules.html

@@ -53,11 +53,22 @@
             {{end}}
           </div>
           <div class="flex gap-1.5 justify-end row-action">
-            {{if and $sc.Enabled (eq $host.Status "online")}}
-              <button class="btn btn-primary"
-                      hx-post="/hosts/{{$host.ID}}/schedules/{{$sc.ID}}/run"
-                      hx-swap="none"
-                      hx-disabled-elt="this">Run now</button>
+            {{if eq $host.Status "online"}}
+              {{if $sc.Enabled}}
+                <button class="btn btn-primary"
+                        hx-post="/hosts/{{$host.ID}}/schedules/{{$sc.ID}}/run"
+                        hx-swap="none"
+                        hx-disabled-elt="this">Run now</button>
+              {{else}}
+                <button class="btn"
+                        hx-post="/hosts/{{$host.ID}}/schedules/{{$sc.ID}}/run"
+                        hx-swap="none"
+                        hx-disabled-elt="this"
+                        hx-confirm="This schedule is paused — running it now won't change that. Fire it once anyway?"
+                        title="schedule is paused; click to fire one ad-hoc run anyway">Run now</button>
+              {{end}}
+            {{else}}
+              <button class="btn" disabled title="host is offline">Run now</button>
             {{end}}
             <form method="post" action="/hosts/{{$host.ID}}/schedules/{{$sc.ID}}/delete" style="display: inline;"
                   onsubmit="return confirm('Delete this schedule? Existing snapshots are not affected.');">