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/ToolCard.tsx

@@ -86,6 +86,14 @@ export function ToolCard({ call, result, running, baseDir }: { call: ToolCall; r
     );
   }
 
+  if (call.name === "remember") {
+    return (
+      <div className="todo-line memory-card">
+        <Icon name="brain" /> {t("memory.remembered")}: {call.input?.note}
+      </div>
+    );
+  }
+
   // Image files written by the agent are shown as images (SVG too, rendered via <img>).
   const writtenImage =
     (call.name === "write" || call.name === "edit") && typeof call.input?.path === "string" && IMAGE_EXT.test(call.input.path) && result && !result.is_error