docs: document SFTP stacked mode fix plan for next agent

PROJECT_STATE.md

@@ -63,6 +63,23 @@
 ✅ Fixed bug: key_list_tab.go & snippet_list_tab.go dropped last row (`rows[:len(rows)-1]` excluded real data)
 ✅ Breakpoints: compact (<60 cols / mobile), medium (60–100 / tablet), wide (≥100 / desktop)
 
+### Next: SFTP Stacked Mode Fix
+⏳ **File**: `pkg/tui/sftp_browser_tab.go`
+⏳ **Masalah**: Stacked mode (<50 cols) render 2 pane vertikal, masing-masing
+   `t.height-6` entries. Total 2x tinggi terminal. Pane kedua menutupi pane pertama.
+   Tab switch bekerja tapi tidak terlihat karena cuma 1 pane visible.
+⏳ **Solusi**:
+   - Stacked mode: render cuma ACTIVE pane (bukan 2 pane)
+   - Tambah pane indicator bar: `[Local]  Remote` (active disorot hijau)
+   - Side-by-side mode (>=50 cols): TIDAK DIUBAH, tetap 2 pane
+⏳ **Detail implementasi**:
+   1. Di `View()`, ganti blok `if t.width < 50`:
+      - Render cuma `t.renderPane(activePane, paneW)` bukan keduanya
+      - Tambah indicator bar sebelum pane: active pane disorot `StatusBarStyle`, inactive `SubtitleStyle`
+   2. `maxDisplay` tidak perlu diubah (cuma 1 pane, full height)
+   3. Footer tetap sama (sudah wrapped)
+⏳ **Prioritas**: HIGH
+
 ---
 
 ## 📊 Current Project Status