feat: right-click menus everywhere, workspace/session cost, long-term DB safety

Right-click menus: one portal shell (components/ContextMenu.tsx) for every
item with actions - sidebar/Recents/archived session rows (SessionMenu),
console tabs, pane headers, the Changes panel's files/tree/commits, the
workspace home, sessions outside a workspace (SessionRowMenu: Sessions
table, Dashboard, Activity, Workflow runs), prompt images, every Settings
list and every Claude Code/Codex config list (FileItemMenu). Buttons stay;
a delete keeps its button's confirm; the shell stops portal clicks from
reaching the card that opened it.

Status bar: Workspace $ and Session $ on the Workspace page, from
?lane= on GET /api/pricing/cost and the focused/replayed session's cost.

Database, no data dropped: synchronous=NORMAL, journal_size_limit 64 MB,
hourly PASSIVE checkpoint + PRAGMA optimize, idx_events_session_created
(replacing the redundant idx_events_session), watchdog reads
sessions.transcript_path, transcript parsed before the hook's write
transaction, GET /api/sessions/:id?events=0 for the web page (reloads only
on its own session, debounced), streamed export, transactional clear-data
and chunked cleanup, subagent import reads tool_use_ids once, runtime logs
rotated past 5 MB.

client/src/components/RemoteSources.tsx

@@ -9,7 +9,8 @@
  * here — authentication defers to the host's SSH stack (~/.ssh/config, agent,
  * keys, known_hosts); a source is just a label + ssh destination (+ optional
  * port / identity file / remote home). Live status/sync updates arrive over the
- * `remote_source.status` WebSocket message.
+ * `remote_source.status` WebSocket message. A right-click on a source opens
+ * its Test / Sync / Enable-Disable / Edit / Delete (plus Copy host) as a menu.
  *
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
@@ -58,6 +59,7 @@
  * ----------------------------------------------------------------------------- */
 
 import { Checkbox } from "./Checkbox";
+import { ContextMenu, MenuItem, MenuSeparator, useContextMenu } from "./ContextMenu";
 import { useCallback, useEffect, useState } from "react";
 import { useTranslation } from "react-i18next";
 import {
@@ -135,6 +137,13 @@ export function RemoteSources() {
   const [formError, setFormError] = useState<string | null>(null);
 
   const [busyId, setBusyId] = useState<string | null>(null);
+  const ctx = useContextMenu<RemoteSource>();
+  // A menu item: close the menu, then act on the source it was opened on.
+  const pick = (fn: (s: RemoteSource) => unknown) => () => {
+    const s = ctx.menu?.item;
+    ctx.close();
+    if (s) fn(s);
+  };
   const [syncingAll, setSyncingAll] = useState(false);
   const [testResults, setTestResults] = useState<Record<string, { ok: boolean; message: string }>>(
     {}
@@ -598,7 +607,7 @@ export function RemoteSources() {
             const test = testResults[s.id];
             const busy = busyId === s.id;
             return (
-              <div key={s.id} className="card p-4">
+              <div key={s.id} onContextMenu={(e) => ctx.open(e, s)} className="card p-4">
                 <div className="flex items-start justify-between gap-3 flex-wrap">
                   <div className="min-w-0">
                     <div className="flex items-center gap-2 flex-wrap">
@@ -753,6 +762,34 @@ export function RemoteSources() {
               </div>
             );
           })}
+          {ctx.menu && (
+            <ContextMenu
+              x={ctx.menu.x}
+              y={ctx.menu.y}
+              onClose={ctx.close}
+              testId="remote-source-menu"
+            >
+              <MenuItem disabled={busyId === ctx.menu.item.id} onSelect={pick(testSource)}>
+                {t("remoteSources.test", "Test")}
+              </MenuItem>
+              <MenuItem disabled={busyId === ctx.menu.item.id} onSelect={pick(syncNow)}>
+                {t("remoteSources.syncNow", "Sync")}
+              </MenuItem>
+              <MenuItem disabled={busyId === ctx.menu.item.id} onSelect={pick(toggleEnabled)}>
+                {ctx.menu.item.enabled
+                  ? t("remoteSources.disable", "Disable")
+                  : t("remoteSources.enable", "Enable")}
+              </MenuItem>
+              <MenuItem onSelect={pick(openEdit)}>{t("common:edit", "Edit")}</MenuItem>
+              <MenuItem onSelect={pick((s) => void navigator.clipboard.writeText(s.host))}>
+                {t("rowMenu.copyHost")}
+              </MenuItem>
+              <MenuSeparator />
+              <MenuItem danger onSelect={pick((s) => setConfirmDelete({ id: s.id, purge: false }))}>
+                {t("common:delete", "Delete")}
+              </MenuItem>
+            </ContextMenu>
+          )}
         </div>
       )}
     </div>