fix: SFTP stacked mode — render only active pane + indicator bar

Stacked mode (<50 cols) now shows only the active pane (Local/Remote)
with a visual indicator bar. Tab switches between panes. Side-by-side
mode (>=50 cols) unchanged.

PROJECT_STATE.md

@@ -63,22 +63,12 @@
 ✅ 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
+### Done: SFTP Stacked Mode Fix
+✅ **File**: `pkg/tui/sftp_browser_tab.go`
+✅ Stacked mode (<50 cols): render cuma ACTIVE pane (bukan 2 pane)
+✅ Pane indicator bar: `[Local]  Remote` — active disorot hijau (StatusBarStyle)
+✅ Side-by-side mode (>=50 cols): tidak diubah, tetap 2 pane
+✅ `maxDisplay` tidak diubah (cuma 1 pane, full height)
 
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