Auto-commit: v2.12 — Fix frontend stuck on Initializing/Waiting for logs

- web/tasks.py: db_log_callback now writes non-OperationalError exceptions to data/app.log for visibility
- web/tasks.py: generate_book_task restructured with try...finally to guarantee final status update — run can never be left in 'running' state if worker crashes
- templates/project.html: added .catch() to fetchLog() with console.error + polling resume on failure; added manual Refresh button to status bar
- templates/run_details.html: improved .catch() in updateLog() with descriptive message + 5s retry; added manual Refresh button to status bar

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

templates/project.html

@@ -107,6 +107,9 @@
                     <div class="d-flex align-items-center mb-2">
                         <div class="spinner-border text-primary spinner-border-sm me-2" role="status"></div>
                         <strong class="text-primary" id="statusPhase">Initializing...</strong>
+                        <button type="button" class="btn btn-sm btn-outline-secondary ms-auto py-0" onclick="fetchLog()" title="Manually refresh status">
+                            <i class="fas fa-sync-alt"></i> Refresh
+                        </button>
                     </div>
                     <h5 class="card-title mb-3" id="statusMessage">Preparing environment...</h5>
                     <div class="progress" style="height: 20px;">
@@ -604,12 +607,17 @@
                 } else {
                     if (activeInterval) clearInterval(activeInterval);
                     activeInterval = null;
-                    
+
                     // Reload if we were polling (watched it finish) OR if page loaded as running but is now done
                     if (initialRunStatus === 'running' || initialRunStatus === 'queued') {
                         window.location.reload();
                     }
                 }
+            })
+            .catch(err => {
+                console.error("Polling failed:", err);
+                // Resume polling so the UI doesn't silently stop updating
+                if (!activeInterval) activeInterval = setInterval(fetchLog, 2000);
             });
     }