feat(ui): real forward-test lifecycle panel (not cosmetic)

Forward mode in the simulation tab now calls the durable /api/v1/forward
lifecycle instead of the single-pass /api/v1/simulation (which only differed
by a mode string). runSimulation branches to /api/v1/forward for forward mode,
loads runs on mount, and renders a forward panel listing each paper run with
its status (frozen/executed/marked/matured), non-PIT badge, holdings and a
Mark / Mature action per run. Frontend build passes (bundle index-INuvPOCF.js).

frontend/src/App.vue

@@ -259,11 +259,21 @@ async function runSimulation() {
   simLoading.value = true
   simResult.value = null
   try {
-    simResult.value = await fetchJson('/api/v1/simulation', {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ capital: Number(simCapital.value), mode: simMode.value }),
-    })
+    if (simMode.value === 'forward') {
+      // REAL forward lifecycle (not cosmetic): freeze + execute a paper run.
+      simResult.value = await fetchJson('/api/v1/forward', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ capital: Number(simCapital.value), use_pit: false }),
+      })
+      await loadForward()
+    } else {
+      simResult.value = await fetchJson('/api/v1/simulation', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ capital: Number(simCapital.value), mode: 'backtest' }),
+      })
+    }
   } catch (caught) {
     notice.value = caught.message
   } finally {
@@ -271,6 +281,38 @@ async function runSimulation() {
   }
 }
 
+// ---- real forward-test lifecycle (durable paper runs) ----
+const fwdRuns = ref([])
+const fwdLoading = ref(false)
+
+async function loadForward() {
+  fwdLoading.value = true
+  try {
+    const body = await fetchJson('/api/v1/forward')
+    fwdRuns.value = body.runs ?? []
+  } catch (caught) {
+    notice.value = caught.message
+  } finally {
+    fwdLoading.value = false
+  }
+}
+async function markForward(id) {
+  try {
+    await fetchJson(`/api/v1/forward/${id}/mark`, { method: 'POST' })
+    await loadForward()
+  } catch (caught) {
+    notice.value = caught.message
+  }
+}
+async function matureForward(id) {
+  try {
+    await fetchJson(`/api/v1/forward/${id}/mature`, { method: 'POST' })
+    await loadForward()
+  } catch (caught) {
+    notice.value = caught.message
+  }
+}
+
 async function loadDashboard() {
   loading.value = true
   error.value = ''
@@ -300,6 +342,7 @@ async function loadDashboard() {
     paperAuthWarning.value = sessionBody.warning || ''
     backtest.value = backtestBody
     researchRun.value = researchBody
+    await loadForward()   // load durable forward-test runs (not cosmetic)
   } catch (caught) {
     error.value = caught.message
   } finally {
@@ -679,6 +722,34 @@ onMounted(async () => { await loadDashboard(); await loadBacktestRuns() })
             </div>
           </div>
           <div v-if="!simResult" class="empty-research">กด 'คำนวณการจัดสรร' เพื่อดูว่า 50/20/30 จัดสรรทุนของคุณไปที่หุ้นไหนบ้าง</div>
+
+          <!-- REAL forward-test lifecycle panel (not cosmetic) -->
+          <div v-if="simMode === 'forward'" class="fwd-panel">
+            <div class="section-kicker">Forward Test (Paper) — สัญญาณถูกตรึง ณ เวลาสร้าง</div>
+            <p class="panel-subtitle">สร้าง forward run → สัญญาณ (คะแนน) ถูก freeze ทันทีที่สร้าง แล้ว execute ด้วยราคาหลัง freeze. กด Mark ตามราคาล่าสุด, Mature เพื่อปิด run. เป็น Paper เท่านั้น.</p>
+            <div v-if="fwdRuns.length === 0" class="empty-research muted-cell">ยังไม่มี forward run — กด 'คำนวณการจัดสรร' ข้างบนเพื่อสร้าง</div>
+            <table v-else class="source-table">
+              <thead><tr><th>#</th><th>สถานะ</th><th>ทุน</th><th>ลงทุน</th><th>ถือ</th><th>ผลตอบแทน</th><th>ตรวจ</th></tr></thead>
+              <tbody>
+                <tr v-for="run in fwdRuns.slice().reverse()" :key="run.id">
+                  <td class="muted-cell">{{ run.id.slice(0, 12) }}</td>
+                  <td>
+                    <span class="status-tag" :class="run.status === 'matured' ? 'warning-tag' : (run.status === 'frozen' ? 'neutral-tag' : 'warning-tag')">{{ run.status }}</span>
+                    <span v-if="run.non_pit" class="status-tag warning-tag" title="ใช้คะแนนปัจจุบัน ไม่ใช่ PIT">non-PIT</span>
+                  </td>
+                  <td>{{ formatNumber(run.capital, 0) }}</td>
+                  <td class="positive-text">{{ formatNumber(run.invested, 0) }}</td>
+                  <td class="muted-cell">{{ Object.keys(run.holdings || {}).join(', ') || '—' }}</td>
+                  <td :class="pnlClass(run.net_return)">{{ run.net_return != null ? (run.net_return * 100).toFixed(2) + '%' : '—' }}</td>
+                  <td>
+                    <button v-if="run.status !== 'matured'" class="primary-btn" style="padding:2px 8px;margin-right:4px" @click="markForward(run.id)">Mark</button>
+                    <button v-if="run.status !== 'matured'" class="primary-btn" style="padding:2px 8px" @click="matureForward(run.id)">Mature</button>
+                    <span v-else class="muted-cell">ปิดแล้ว</span>
+                  </td>
+                </tr>
+              </tbody>
+            </table>
+          </div>
         </section>
 
         <section class="panel backtest-panel" id="backtest">