fix: critical QA findings — dead code and prop mismatch

1. Remove get_config_manager() call from translate_run_websocket
   (@app.websocket /ws/translate/run/{run_id}) — was not imported
   and unused. Also remove unused from sqlalchemy.orm import Session.
2. Fix prop name mismatch: showBulkReplace -> showPageBulkReplace
   in RunTabContent. Use () for reactive two-way binding.
3. Add ('DRAFT') for status prop in RunTabContent.

backend/src/app.py

@@ -640,10 +640,8 @@ async def translate_run_websocket(websocket: WebSocket, run_id: str):
     await websocket.accept()
     logger.reason("Accepted translate run WebSocket", extra={"run_id": run_id})
     try:
-        config_manager = get_config_manager()
         while True:
             try:
-                from sqlalchemy.orm import Session
                 from .core.database import SessionLocal
                 from .plugins.translate.orchestrator_aggregator import TranslationResultAggregator
                 from .core.event_log import EventLog

frontend/src/lib/components/translate/RunTabContent.svelte

@@ -21,7 +21,7 @@
   import TranslationRunResult from './TranslationRunResult.svelte';
 
   let {
-    status = 'DRAFT',
+    status = $bindable('DRAFT'),
     jobId = '',
     isRunning = false,
     isFullRun = false,
@@ -30,14 +30,12 @@
     runComplete = false,
     completedRuns = [],
     expandedRunIds = [],
-    showBulkReplace = false,
+    showPageBulkReplace = $bindable(false),
     onTriggerRun = (isFull) => {},
     onRetryRun = () => {},
     onRetryInsert = () => {},
     onLoadRunHistory = () => {},
     onToggleRunDetails = (id) => {},
-    onBulkReplaceApplied = (count) => {},
-    onBulkReplaceClose = () => {},
     getJobStatusLabel = (s) => s,
   } = $props();
 
@@ -144,7 +142,7 @@
         <div class="flex items-center justify-between mb-2">
           <h3 class="text-sm font-medium text-gray-700">{$t.translate?.config?.recent_runs}</h3>
           <button
-            onclick={() => showBulkReplace = true}
+            onclick={() => showPageBulkReplace = true}
             class="px-3 py-1.5 text-xs bg-indigo-600 text-white rounded hover:bg-indigo-700 transition-colors"
           >
             {$t.translate?.run?.bulk_replace || 'Bulk Replace'}