feat(app): expose local sharing and verified transfers

Add a durable, acknowledged Local network sharing switch with fail-closed
hydration, serialized mutation, and redacted ephemeral-identity diagnostics.
Keep local Call-to-Play state available while gating every network action on the
effective sharing generation.

Render revisioned verification, invalid-source retry, and sticky source
exhaustion states. Preserve opaque attempt IDs through progress delivery so
out-of-order webview events cannot attach stale bytes to a successor transfer,
and keep terminal exhaustion visible after the last source departs.

Own listeners, native invokes, persistence, dialogs, and companion-window
creation through webview close. Late creation is settled and cleaned before the
parent realm is destroyed.

Test Plan:
- `just frontend-test` -- passed (91/91)
- `just build` -- passed with TypeScript, Vite, and release Tauri compilation
- `just test` -- passed on the completed stack (708 workspace tests)
- `just clippy` -- passed on the completed stack
- `git diff --cached --check` -- passed

crates/lanspread-tauri-deno-ts/src/lib/protocolMismatch.ts

@@ -0,0 +1,18 @@
+import { type ProtocolMismatch } from "./types";
+
+export interface ProtocolMismatchSnapshot {
+  revision: number;
+  mismatch: ProtocolMismatch | null;
+}
+
+export const INITIAL_PROTOCOL_MISMATCH_SNAPSHOT: ProtocolMismatchSnapshot = {
+  revision: 0,
+  mismatch: null,
+};
+
+/** Keeps listener events and bootstrap queries monotonic across async races. */
+export const newestProtocolMismatchSnapshot = (
+  current: ProtocolMismatchSnapshot,
+  candidate: ProtocolMismatchSnapshot,
+): ProtocolMismatchSnapshot =>
+  candidate.revision > current.revision ? candidate : current;