fix(scheduling): fix vehicle type classification and algorithm candidate matching

- classifyVehicleType now parses dic_type.dic_name (e.g. "4.5吨冷链车") instead of raw model code
- Remove overly strict completionRate >= 0.8 filter for hopeless candidates
- Use vehicle's yearTarget as fallback when inventory has no assessment target
- Filter out suggestions with no candidates (not actionable)
- estimatedGain counts rescue_hopeless suggestions as potential gains

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/server/routes/scheduling/suggestions.ts

@@ -12,13 +12,18 @@ import type { AuthUser } from '../../auth/types.js';
 // Helper: vehicle type classification
 // ---------------------------------------------------------------------------
 
-function classifyVehicleType(type: string, model: string): string {
-  if (type === '4.5T' && model.includes('冷链')) return '4.5T冷链';
-  if (type === '4.5T') return '4.5T普货';
-  if (type === '18T') return '18T';
-  if (type === '49T') return '49T';
-  if (type === '挂车' || model.includes('挂车')) return '挂车';
-  return type || '其他';
+/**
+ * Classify vehicle type from dic_type.dic_name (e.g. "4.5吨冷链车", "4.5吨货车", "18吨双飞翼货车").
+ * The typeName is the full label from the dictionary, modelRaw is the numeric dic_code.
+ */
+function classifyVehicleType(typeName: string, _modelRaw: string): string {
+  const t = (typeName || '').trim();
+  if (t.includes('4.5') && t.includes('冷链')) return '4.5T冷链';
+  if (t.includes('4.5')) return '4.5T普货';
+  if (t.includes('18')) return '18T';
+  if (t.includes('49') || t.includes('牵引')) return '49T';
+  if (t.includes('挂车')) return '挂车';
+  return t || '其他';
 }
 
 // ---------------------------------------------------------------------------