feat(settings): data-safe editors, deep-linked search, Data/About/Cost pages

- EditorModal loads once per path (a parent re-render no longer reloads the
  file over the user's typing), refuses Save after a failed load, opens a
  truncated (>256 KB) file read-only, and asks before overwriting a file
  that changed on disk or could not be re-read.
- Settings/Hooks editors unset only keys from the snapshot taken at Edit,
  warn when the file changed underneath, keep a renamed key's value, and
  refuse a new key named like a redacted one (env) or a read-only hook
  event, which used to replace the secret/hooks.
- Project scope shows its resolved folder and is disabled inside the
  plugin cache. Account-profile, pricing-row and pet deletes confirm;
  two-click actions disarm after 3 s; unsaved drafts ask before closing.
- Search indexes every Claude Code / Codex sub-tab, opens it via ?tab= and
  scrolls to + highlights the row; the active config tab is in the URL.
- General splits into General / Data / About; Pricing moves to a Cost
  group with one shared load; config tabs group as Content / Extensions /
  Config with arrow-key roving; Promise.allSettled per tab.
- Data: browser-preferences export/import (allowlisted keys), per-section
  reset, housekeeping dry-run first, clear-all behind a typed phrase.
  Server: purge days must be a whole number >= 1 (INVALID_PURGE_DAYS) and
  dry_run returns exactly what the real run would delete.
- Alerts can be edited; webhooks/alerts/remote-source failures toast;
  copies go through copyText; modals get dialog roles and useDialog.
- Sagi: Ctrl/Cmd+B only when shown and not typing, default spot clear of
  row controls, arrow keys move it, reduced motion honoured; the dead
  /run launch link goes to the workspace.

client/src/components/settings/HomeDirSetting.tsx

@@ -5,14 +5,18 @@
  * server's refusal inline, the saved value while the field differs from it,
  * and a warning when the real
  * environment sets the variable (the environment wins at the next start, so a
- * saved value would not survive a restart). The server validates and persists;
- * this component only loads, submits and reports.
+ * saved value would not survive a restart). Enter saves; a caller may ask for
+ * a confirmation first (`confirm`). The server validates and persists; this
+ * component only loads, submits and reports.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 
 import { useEffect, useState } from "react";
 import { useTranslation } from "react-i18next";
 import { AlertTriangle, FolderOpen } from "lucide-react";
+import { confirmDialog } from "../../lib/confirm";
+import { isSubmitEnter } from "../../lib/keys";
+import { SettingsSection } from "./SettingsRow";
 
 export interface HomeDirValue {
   value: string;
@@ -29,6 +33,8 @@ interface Props {
   /** Optional second line under the description. */
   note?: string;
   placeholder: string;
+  /** Ask this before saving (a change with wide effects, like CLAUDE_HOME). */
+  confirm?: { title: string; message?: string };
   load: () => Promise<HomeDirValue>;
   save: (path: string) => Promise<HomeDirValue>;
 }
@@ -37,7 +43,16 @@ interface Props {
  * An editable home directory with its own load/save cycle.
  * @returns The section, or its skeleton-free shell while loading.
  */
-export function HomeDirSetting({ id, title, description, note, placeholder, load, save }: Props) {
+export function HomeDirSetting({
+  id,
+  title,
+  description,
+  note,
+  placeholder,
+  confirm,
+  load,
+  save,
+}: Props) {
   const { t } = useTranslation("settings");
   const [current, setCurrent] = useState<HomeDirValue | null>(null);
   const [input, setInput] = useState("");
@@ -61,7 +76,8 @@ export function HomeDirSetting({ id, title, description, note, placeholder, load
   }, []);
 
   const handleSave = async () => {
-    if (!current || input === current.value) return;
+    if (!current || input === current.value || saving) return;
+    if (confirm && !(await confirmDialog({ ...confirm, confirmLabel: t("homeDir.save") }))) return;
     setSaving(true);
     setError(null);
     try {
@@ -76,15 +92,18 @@ export function HomeDirSetting({ id, title, description, note, placeholder, load
   };
 
   return (
-    <section id={id} className="scroll-mt-24">
-      <h3 className="text-sm font-medium text-fg-secondary flex items-center gap-2 mb-1">
-        <FolderOpen className="w-4 h-4 text-fg-muted" />
-        {title}
-      </h3>
-      <p className="text-xs text-fg-muted mb-1">{description}</p>
-      {note && <p className="text-[11px] text-fg-muted italic mb-4 leading-snug">{note}</p>}
-
-      <div className={`card p-5 space-y-4 ${note ? "" : "mt-3"}`}>
+    <SettingsSection
+      id={id}
+      title={
+        <span className="flex items-center gap-2">
+          <FolderOpen className="w-4 h-4 text-fg-muted" />
+          {title}
+        </span>
+      }
+      description={description}
+    >
+      <div className="space-y-4">
+        {note && <p className="text-[11px] text-fg-muted italic leading-snug">{note}</p>}
         <div className="flex items-center gap-3">
           <input
             type="text"
@@ -94,10 +113,17 @@ export function HomeDirSetting({ id, title, description, note, placeholder, load
               setInput(e.target.value);
               setError(null);
             }}
-            className="flex-1 bg-surface-4 border border-surface-3 rounded-lg px-3 py-2 text-sm text-fg-secondary font-mono focus:outline-none focus:border-violet-500/50"
+            onKeyDown={(e) => {
+              if (isSubmitEnter(e)) {
+                e.preventDefault();
+                void handleSave();
+              }
+            }}
+            className="input flex-1 font-mono"
             placeholder={placeholder}
           />
           <button
+            type="button"
             onClick={handleSave}
             disabled={saving || !current || input === current.value}
             className="btn-primary px-4 py-2 text-sm disabled:opacity-50 disabled:cursor-not-allowed"
@@ -125,6 +151,6 @@ export function HomeDirSetting({ id, title, description, note, placeholder, load
           </p>
         )}
       </div>
-    </section>
+    </SettingsSection>
   );
 }