refactor(audit): batch 2 — remove dead scaffolding from the shipping binary

Two dead-code removals surfaced by the audit; no runtime behavior change.

1. Delete the lite-lifecycle "readiness" scaffold (~1,586 lines). The pure
   dry-run evaluateLiteWalletServerLifecycleReadiness (whose own status text
   says "wallet lifecycle execution is still disabled in this scaffold") had
   zero callers; executeLiteWalletServerSelectionUi had zero callers; and
   executeLiteWalletLifecycleUiRequest's only caller was a fallback in
   settings_page reached only when app->liteWallet() is null. Deleted
   lite_wallet_server_lifecycle_readiness.{h,cpp} and the readiness /
   UI-execution machinery + enums + translation tables from both adapters,
   keeping the genuinely-live helpers (liteConnectionSettingsFromAppSettings,
   applyLiteConnectionSettingsToAppSettings, redactLiteServerSelectionValue,
   and the LiteWalletLifecycleUiExecutionInput DTO the live create/open/
   restore path still uses). The null-backend fallback now sets a plain
   "Lite wallet backend unavailable" status. This is exactly the
   readiness/scaffold pattern CLAUDE.md forbids regrowing.

2. Split the HushChat fixture/capture-manifest/seed-projection tooling
   (~2,050 lines, incl. the libsodium seed-projection) out of
   chat_protocol.cpp (1854 -> 284) and chat_protocol.h (586 -> 105) into a
   new chat_fixture_tooling.{h,cpp} compiled ONLY into the HushChatFixtureCheck
   dev tool — never into the app, lite, or test binaries (verified via nm).
   The app keeps only the runtime slice (memo parsing + tx metadata
   extraction) that network_refresh_service actually calls. Also moved the
   decrypt-preflight/hex helpers, which likewise had no runtime caller.

Note: the HushChat split is on gated-off experimental code and should be
coordinated with the pending dormant-HushChat-content handling (commit
af06b8b) before the lite PR — done here as a pure mechanical split, no redesign.

Full-node + Lite + HushChatFixtureCheck build clean; ctest 1/1; hygiene clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/wallet/lite_wallet_lifecycle_ui_adapter.h

@@ -1,53 +1,21 @@
 #pragma once
 
 #include "lite_wallet_server_selection_adapter.h"
+#include "lite_wallet_lifecycle_service.h"
+#include "wallet_capabilities.h"
 
 #include "../config/settings.h"
 
-#include <string>
-#include <vector>
-
 namespace dragonx {
 namespace wallet {
 
-enum class LiteWalletLifecycleUiExecutionStatus {
-    ReadyForFutureLifecycleRequest,
-    WaitingForLiteBuild,
-    WaitingForBackendCapability,
-    WaitingForSettings,
-    WaitingForPersistedServerSelection,
-    WaitingForServerSelection,
-    WaitingForDisplayStatus,
-    WaitingForLifecycleUi,
-    WaitingForRequest,
-    WaitingForPrivateDataRedaction,
-    WaitingForSyncPlannerFeed,
-    RuntimeExecutionDisabled
-};
-
-enum class LiteWalletLifecycleUiExecutionIssue {
-    FullNodeBuild,
-    LiteBackendCapabilityMissing,
-    SettingsNotLoaded,
-    PersistedServerSelectionIntentMissing,
-    ServerSelectionMissing,
-    SelectedServerDisplayMissing,
-    LifecycleUiOwnerMissing,
-    LifecycleOperationUnconfirmed,
-    OpenWalletPathMissing,
-    RestoreSeedMissing,
-    PrivateDataRedactionMissing,
-    SyncPlannerFeedMissing,
-    ServerConnectivityCheckRequested,
-    WalletExistsCheckRequested,
-    WalletLifecycleExecutionRequested,
-    SyncRequested,
-    SyncStatusPollingRequested,
-    WorkerQueueRequested,
-    WalletStateMutationRequested,
-    WalletFilePersistenceRequested,
-    SendImportExportRequested,
-    SettingsWriteRequested
+struct LiteWalletLifecycleUiPrerequisites {
+    bool selectedServerDisplayReady = false;
+    bool lifecycleUiOwnerReady = false;
+    bool operationConfirmed = false;
+    bool privateDataRedactionReady = false;
+    bool syncPlannerFeedReady = false;
+    bool realLifecycleExecutionRequested = false;
 };
 
 struct LiteWalletLifecycleUiRequestIntent {
@@ -77,59 +45,5 @@ struct LiteWalletLifecycleUiExecutionInput {
     bool sendImportExportExecutionRequested = false;
 };
 
-struct LiteWalletLifecycleUiExecutionIssueInfo {
-    LiteWalletLifecycleUiExecutionIssue issue = LiteWalletLifecycleUiExecutionIssue::SettingsNotLoaded;
-    std::string message;
-};
-
-struct LiteWalletLifecycleUiExecutionResult {
-    bool ok = false;
-    bool dryRunOnly = true;
-    bool noNetwork = true;
-    bool noBridgeCalls = true;
-    bool noServerHealthChecked = true;
-    bool noWalletExistsChecked = true;
-    bool noWalletCreated = true;
-    bool noWalletOpened = true;
-    bool noWalletRestored = true;
-    bool noSyncStarted = true;
-    bool noSyncStatusPolled = true;
-    bool noWalletPersistence = true;
-    bool noSettingsPersistence = true;
-    bool noSendImportExportExecution = true;
-    bool settingsWritten = false;
-    bool workerQueueEnqueued = false;
-    bool stateMutationAllowed = false;
-    bool stateMutated = false;
-    bool walletStateWritten = false;
-    bool selectedServerSettingsLoaded = false;
-    bool selectedServerIntentAccepted = false;
-    bool lifecycleReadinessAccepted = false;
-    bool requestAccepted = false;
-    bool privateDataRedacted = false;
-    bool lifecycleReportCouldFeedSyncPlanners = false;
-    LiteWalletLifecycleUiExecutionStatus status = LiteWalletLifecycleUiExecutionStatus::WaitingForSettings;
-    std::string error;
-    std::string selectedServerUrlRedacted;
-    std::string requestSummaryRedacted;
-    std::string diagnosticSummary;
-    LiteConnectionSettings connectionSettings;
-    LiteServerSelectionResult selectedServer;
-    LiteWalletServerSelectionUiExecutionResult serverSelectionReport;
-    LiteWalletServerLifecycleReadinessInput lifecycleInput;
-    LiteWalletServerLifecycleReadinessResult lifecycleReadiness;
-    std::vector<LiteRedactedPrivateData> privateData;
-    std::vector<LiteWalletLifecycleUiExecutionIssueInfo> issues;
-};
-
-const char* liteWalletLifecycleUiExecutionStatusName(
-    LiteWalletLifecycleUiExecutionStatus status);
-const char* liteWalletLifecycleUiExecutionIssueName(
-    LiteWalletLifecycleUiExecutionIssue issue);
-
-LiteWalletLifecycleUiExecutionResult executeLiteWalletLifecycleUiRequest(
-    config::Settings& settings,
-    const LiteWalletLifecycleUiExecutionInput& input);
-
 } // namespace wallet
-} // namespace dragonx
+} // namespace dragonx