refactor(scheduling): rewrite terminology to match core business logic

Core story: 里程高的车换下来，里程少的车换上去。

- Summary cards: "里程高·需换下" / "里程低·需换走" / "替换建议"
- List tags: "换下" (amber) / "换走" (blue) with matching color bars
- Detail modal title: "里程高·换下此车" / "里程低·换走此车"
- Candidate section: explains WHY these vehicles are recommended
  - 换下: "以下车辆里程缺口大，换到该高里程客户处可加速达标"
  - 换走: "以下车辆里程已充足，可调给当前客户，将此车换走给高里程客户冲刺"
- Reason text: states current situation + clear action recommendation
  with specific numbers (已跑, 缺口, 日均, 完成率)

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

src/modules/scheduling/SchedulingModule.tsx

@@ -183,12 +183,12 @@ export default function SchedulingModule() {
                 : 'bg-amber-50 border border-amber-100'
             }`}
           >
-            <div className="text-[10px] font-bold text-amber-700 mb-1">已达标车辆</div>
+            <div className="text-[10px] font-bold text-amber-700 mb-1">里程高·需换下</div>
             <div className="text-2xl font-black text-amber-800">
               {loading && !data ? '-' : summary?.qualifiedCount ?? 0}
               <span className="text-xs font-normal text-amber-600 ml-1">台</span>
             </div>
-            <div className="text-[9px] text-amber-600 mt-1">本年完成率 ≥ 120%</div>
+            <div className="text-[9px] text-amber-600 mt-1">已达标，换上里程少的车</div>
           </button>
 
           <button
@@ -199,12 +199,12 @@ export default function SchedulingModule() {
                 : 'bg-blue-50 border border-blue-100'
             }`}
           >
-            <div className="text-[10px] font-bold text-blue-700 mb-1">无望达标</div>
+            <div className="text-[10px] font-bold text-blue-700 mb-1">里程低·需换走</div>
             <div className="text-2xl font-black text-blue-800">
               {loading && !data ? '-' : summary?.hopelessCount ?? 0}
               <span className="text-xs font-normal text-blue-600 ml-1">台</span>
             </div>
-            <div className="text-[9px] text-blue-600 mt-1">本年完成率 &lt; 60%</div>
+            <div className="text-[9px] text-blue-600 mt-1">无法达标，调给高里程客户</div>
           </button>
 
           <button
@@ -215,13 +215,13 @@ export default function SchedulingModule() {
                 : 'bg-emerald-50 border border-emerald-100'
             }`}
           >
-            <div className="text-[10px] font-bold text-emerald-700 mb-1">可干预建议</div>
+            <div className="text-[10px] font-bold text-emerald-700 mb-1">替换建议</div>
             <div className="text-2xl font-black text-emerald-800">
               {loading && !data ? '-' : summary?.suggestionCount ?? 0}
               <span className="text-xs font-normal text-emerald-600 ml-1">条</span>
             </div>
             <div className="text-[9px] text-emerald-600 mt-1">
-              预计 +{summary?.estimatedGain ?? 0} 台可达标
+              预计 +{summary?.estimatedGain ?? 0} 台可新增达标
             </div>
           </button>
         </div>