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/config/configPrimitives.tsx

@@ -10,23 +10,23 @@
 import { useState } from "react";
 import { useTranslation } from "react-i18next";
 import { Copy, Check } from "lucide-react";
+import { copyText } from "../../lib/clipboard";
 
 export function CopyButton({ value }: { value: string }) {
   const { t } = useTranslation("ccConfig");
   const [copied, setCopied] = useState(false);
   return (
     <button
+      type="button"
       onClick={async () => {
-        try {
-          await navigator.clipboard.writeText(value);
+        if (await copyText(value, true)) {
           setCopied(true);
           setTimeout(() => setCopied(false), 1500);
-        } catch {
-          /* clipboard unavailable */
         }
       }}
       className="text-[10px] font-medium px-1.5 py-1 rounded border border-border bg-surface-1 hover:bg-surface-3 text-fg-secondary hover:text-fg-primary inline-flex items-center gap-1 flex-shrink-0"
       title={t("common.copyPath")}
+      aria-label={t("common.copyPath")}
     >
       {copied ? <Check className="w-3 h-3" /> : <Copy className="w-3 h-3" />}
     </button>