Make relay opt-in when pairing devices (#2706)

* feat: make relay opt-in for device pairing

* fix(relay): keep pairing state authoritative

* fix(relay): refresh pairing state across transports

* fix(onboard): honor explicit relay opt-out

* fix(relay): surface transport startup failures

* fix(pairing): gate offers for older daemons

* test(cli): rely on real pairing transport coverage

* fix(cli): report live relay without a pid file

* fix(relay): synchronize config during daemon startup

* fix(relay): preserve mutability for ignored overrides

* fix(cli): use reachable daemon for pairing

* fix(app): redirect invalid pair device routes

* fix(pairing): support remote host device pairing

Keep Pair Device host-relative through the existing settings and daemon RPC flow. Route CLI output through an injected adapter so workflow tests do not mutate process globals.

* fix(pairing): validate pairing destinations

Expose the host-relative Pair Device flow on every supported app platform. Reject a reachable daemon whose identity does not match the requested Paseo home before reading or mutating its pairing state.

* fix(pairing): render QR codes across platforms

Generate SVG text without DOM or canvas and render it through the existing cross-platform SVG stack.

* fix(cli): pair from persisted relay state

Allow explicit relay pairing while the daemon is stopped when relay is already enabled in persisted configuration.

packages/cli/src/run.test.ts

@@ -15,6 +15,23 @@ describe("runCli", () => {
     ).toEqual(["node", "paseo", "onboard"]);
   });
 
+  it("routes explicit root relay flags to onboard", () => {
+    expect(
+      createCliParseArgv({
+        argv: ["--relay"],
+        cwd: process.cwd(),
+        nodeArgv: ["node", "paseo"],
+      }),
+    ).toEqual(["node", "paseo", "onboard", "--relay"]);
+    expect(
+      createCliParseArgv({
+        argv: ["--no-relay"],
+        cwd: process.cwd(),
+        nodeArgv: ["node", "paseo"],
+      }),
+    ).toEqual(["node", "paseo", "onboard", "--no-relay"]);
+  });
+
   it("preserves known CLI command argv", () => {
     expect(
       createCliParseArgv({