feat(ui): redesign the overview page as a trend-first command deck

Replace the ten-small-cards overview with an action bar, four vitals
tiles carrying 72-sample sparklines seeded from /server/history, a
two-series throughput chart, a TCP/UDP connections chart, and a
grouped system strip (uptime xray|os, panel ram|threads, ip
addresses). StatusCard and XrayStatusCard are deleted; every modal
stays reachable from the action bar, the Xray error message moves
into a tooltip on the state pill, and the panel version text keeps
opening the update modal (the dev-channel switch lives there) even
when no update is available. Live values sit beside the
upload/download and tcp/udp legends, a health sentence appears only
when a vital crosses the shared warn/crit thresholds now exported
from models/status, and load average is left to System History.

The sidebar becomes an auto-collapsed 72px icon rail that expands as
an overlay on hover: rail width, brand-row height and menu paddings
are pinned so nothing shifts during the transition, the collapsed-menu
tooltips are disabled, hover state survives the per-page sidebar
remounts (with a matches(':hover') resync), and the manual collapse
trigger is gone.

Sparkline gains rgb()/rgba() support in its fill gradient, a
showLegend prop so pages stop reaching into its internals, and loses
a dependency-less repaint effect that doubled canvas paints. Chart
tooltips show clock time via the new TimeFormatter.formatClock;
accents come from theme tokens instead of status.cpu.color. Verified
by screenshot at 390/800/1150/1280/1400/1600px in light and dark,
en and fa-IR, plus programmatic geometry checks on the sidebar.
Locale files gain 8 keys and lose 9 dead ones across all 13
languages.

internal/web/translation/id-ID.json

@@ -106,7 +106,6 @@
     "routing": "Pengalihan",
     "outbounds": "Outbound",
     "apiDocs": "Dokumentasi API",
-    "link": "Kelola",
     "donate": "Donasi",
     "hosts": "Host",
     "docs": "Dokumentasi",
@@ -127,12 +126,9 @@
     },
     "index": {
       "cpu": "CPU",
-      "logicalProcessors": "Prosesor logis",
-      "frequency": "Frekuensi",
       "swap": "Swap",
       "storage": "Penyimpanan",
       "memory": "Memori",
-      "threads": "Thread",
       "xrayStatus": "Xray",
       "stopXray": "Hentikan",
       "restartXray": "Mulai ulang",
@@ -153,7 +149,6 @@
       "xrayStatusRunning": "Berjalan",
       "xrayStatusStop": "Berhenti",
       "xrayStatusError": "Error",
-      "operationHours": "Waktu Aktif",
       "systemHistoryTitle": "Riwayat Sistem",
       "historyTitleCpu": "Penggunaan CPU",
       "historyTitleMem": "Penggunaan Memori",
@@ -171,7 +166,6 @@
       "historyTabLoad": "Beban",
       "historyTabConnections": "Koneksi",
       "historyTabDiskUsage": "Penggunaan Disk",
-      "charts": "Grafik",
       "xrayMetricsTitle": "Metrik Xray",
       "xrayTitleHeap": "Memori Heap Teralokasi",
       "xrayTitleSys": "Memori Dicadangkan dari OS",
@@ -200,7 +194,6 @@
       "overallSpeed": "Kecepatan keseluruhan",
       "upload": "Unggah",
       "download": "Unduh",
-      "totalData": "Total data",
       "sent": "Dikirim",
       "received": "Diterima",
       "xraySwitchVersionDialog": "Apakah Anda yakin ingin mengubah versi Xray?",
@@ -250,7 +243,18 @@
       "exportDatabasePgDesc": "Klik untuk mengunduh dump PostgreSQL (.dump) dari basis data Anda saat ini ke perangkat Anda.",
       "importDatabasePgDesc": "Klik untuk memilih dan mengunggah cadangan PostgreSQL (.dump), basis data SQLite (.db), atau dump migrasi SQLite guna memulihkan basis data Anda. Ini menggantikan semua data saat ini.",
       "migrationDownload": "Unduh migrasi",
-      "migrationDownloadPgDesc": "Klik untuk mengunduh basis data SQLite .db yang dibuat dari data PostgreSQL Anda, siap menjalankan panel ini di SQLite."
+      "migrationDownloadPgDesc": "Klik untuk mengunduh basis data SQLite .db yang dibuat dari data PostgreSQL Anda, siap menjalankan panel ini di SQLite.",
+      "avg": "rerata",
+      "peak": "puncak",
+      "free": "tersisa",
+      "openSockets": "soket terbuka",
+      "throughputSub": "Total antarmuka",
+      "avgWindow": "Rerata periode",
+      "healthWarm": "{list} — mulai tinggi",
+      "healthCritical": "{list} — kritis",
+      "panel": "Panel",
+      "threads": "Thread",
+      "uptime": "Waktu aktif"
     },
     "inbounds": {
       "totalDownUp": "Total Terkirim/Diterima",