feat!: genesis-pinned operator set, server identity with an encrypted control link, key-less join codes; release key continuity

Join codes need no passkey touch and carry only public values (genesis
fingerprint, owner credentials, installer hashes). Nodes pin the genesis and
owners at enrollment and only follow passkey-signed operator set versions.
The panel's server key is listed in the set; pinned nodes require its
signature and run the control link under AES-256-GCM. Password sessions carry
no capabilities. The updater adopts a next_key from a signed manifest.

Bump version to 0.2.0. [CI SKIP]

backend/src/MoShiro.Backend.Api/Admin/AgentEndpoints.cs

@@ -1,4 +1,5 @@
 using Fleet.Core;
+using Fleet.Identity;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Routing;
@@ -129,12 +130,23 @@ public static class AgentEndpoints
     private static async Task<IResult> ListTokensAsync(JoinTokenService tokens, CancellationToken ct) =>
         TypedResults.Json(new PageDto<JoinTokenDto>([.. (await tokens.ListAsync(ct)).Select(Mappers.ToDto)], null), ApiJsonContext.Default.PageDtoJoinTokenDto);
 
-    private static async Task<IResult> CreateTokenAsync(HttpContext http, JoinTokenService tokens, CreateJoinTokenRequest request, BackendOptions options)
+    private static async Task<IResult> CreateTokenAsync(HttpContext http, JoinTokenService tokens, TrustService trust, CreateJoinTokenRequest request, BackendOptions options)
     {
         string baseUrl = options.PublicUrl ?? $"{http.Request.Scheme}://{http.Request.Host}";
+
+        // 信任根建立之后，命令里带上创世指纹和属主；属主默认是操作员集合里的全部 passkey，也可以只选其中几把
+        OperatorSet? set = await trust.CurrentAsync(http.RequestAborted);
+        string? genesis = set is null ? null : (await trust.StateAsync(AuthEndpoints.PasskeyContextOf(http, options), http.RequestAborted)).Genesis;
+        string[] controllers = set is null ? [] : [.. request.Controllers ?? [.. set.Keys.Select(k => k.CredentialId)]];
+        if (set is not null && controllers.Any(c => set.Keys.All(k => k.CredentialId != c)))
+        {
+            return Problems.From(http, ValidationError.Single("controllers", "must be passkeys of the operator set"));
+        }
+
+        var plan = new InstallPlan(genesis, controllers, InstallScripts.Sha256(InstallScripts.Sh), InstallScripts.Sha256(InstallScripts.Ps1));
         http.SetDetail($"{request.Role ?? JoinTokenService.AgentRole}: {request.Note}");
         Result<CreatedJoinToken> result = await tokens.CreateAsync(
-            new Application.CreateJoinTokenRequest(request.Note, request.Labels, request.AutoApprove ?? true, request.MaxUses ?? 1, request.ExpiresInHours ?? 24, request.Role ?? JoinTokenService.AgentRole, http.GetPrincipal().Label), baseUrl, http.RequestAborted);
+            new Application.CreateJoinTokenRequest(request.Note, request.Labels, request.AutoApprove ?? true, request.MaxUses ?? 1, request.ExpiresInHours ?? 24, request.Role ?? JoinTokenService.AgentRole, http.GetPrincipal().Label), baseUrl, plan, http.RequestAborted);
         if (!result.TryGet(out CreatedJoinToken? created, out FleetError? error))
         {
             return Problems.From(http, error);