feat(sync): add SSE live feed, unified logs page, fix Oracle connection

- Add SSE event bus in sync_service (subscribe/unsubscribe/_emit)
- Add GET /api/sync/stream SSE endpoint for real-time sync progress
- Rewrite logs.html: unified runs table + live feed + summary + filters
- Rewrite logs.js: SSE EventSource client, run selection, pagination
- Dashboard: clickable runs navigate to /logs?run=, sync started banner
- Remove "Import Comenzi" nav item, delete sync_detail.html
- Add error_message column to sync_runs table with migration
- Fix: export TNS_ADMIN as OS env var so oracledb finds tnsnames.ora
- Fix: use get_oracle_connection() instead of direct pool.acquire()
- Fix: CRM_POLITICI_PRET_ART INSERT to match actual table schema

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

api/app/static/js/dashboard.js

@@ -114,7 +114,7 @@ async function loadSyncHistory() {
             }
             const statusClass = r.status === 'completed' ? 'bg-success' : r.status === 'running' ? 'bg-primary' : 'bg-danger';
 
-            return `<tr style="cursor:pointer" onclick="window.location='/sync/run/${esc(r.run_id)}'">
+            return `<tr style="cursor:pointer" onclick="window.location='/logs?run=${esc(r.run_id)}'">
                 <td>${started}</td>
                 <td><span class="badge ${statusClass}">${esc(r.status)}</span></td>
                 <td>${r.total_orders || 0}</td>
@@ -192,6 +192,16 @@ async function startSync() {
         const data = await res.json();
         if (data.error) {
             alert(data.error);
+            return;
+        }
+        // Show banner with link to live logs
+        if (data.run_id) {
+            const banner = document.getElementById('syncStartedBanner');
+            const link = document.getElementById('syncRunLink');
+            if (banner && link) {
+                link.href = '/logs?run=' + encodeURIComponent(data.run_id);
+                banner.classList.remove('d-none');
+            }
         }
         loadDashboard();
     } catch (err) {