Add terminal client, memory, model fallback, version and install improvements

- codecraft: full-screen terminal client (ratatui) – local tools and files,
  models via the CodeCraft server gateway or own providers (standalone with a
  guided setup), slash commands, @files, permission dialogs, resume, update
- Static Linux CLI builds (x86_64/aarch64, cargo-zigbuild) served by the
  server: /cli/install.sh and /cli/download/<target>
- Project memory (remember tool, .codecraft/memory.md) and personal memory
- Model fallback when a host is unreachable or a budget is used up
- Version/commit in UI and health, daily release check, "What's new" dialog
- PWA: install button, maskable icon, manifest id and screenshots
- Case-insensitive detection of connection errors for retries

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/components/settings/Account.tsx

@@ -4,6 +4,8 @@ import { useT } from "../../i18n";
 import { useStore } from "../../store";
 import { GitAccount } from "./GitAccount";
 import { ApiTokens } from "./ApiTokens";
+import { CliInstall } from "./CliInstall";
+import { Memory } from "./Memory";
 
 export function Account() {
   const t = useT();
@@ -46,7 +48,9 @@ export function Account() {
       </button>
       <div style={{ fontSize: 12, color: "var(--muted)", marginTop: 8 }}>{t("account.hint")}</div>
     </div>
+    <Memory />
     <GitAccount />
+    <CliInstall />
     <ApiTokens />
     </>
   );