feat(lite): lite wallet foundation (inherited working-tree state)

Preserve the previously-uncommitted lite wallet implementation and related dev WIP
under version control:
- src/wallet/ lite services: client bridge, bridge runtime, connection, lifecycle,
  sync, gateway, result parsers, state mapper, artifact contract/resolver, refresh
  services, UI adapters, wallet_backend/capabilities. (Includes two small M1 fixes:
  lifecycle walletReady now parses the response; default chain name -> "main".)
- src/chat/ chat protocol; tests/fixtures/ (lite + hushchat); tools/hushchat_fixture_check.cpp;
  scripts/build-lite-backend-artifact.sh.
- Pre-existing modified app_network/security/wizard, network_refresh_service, sidebar,
  mining_tab, bootstrap dialog, and version headers captured as-is.

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

tests/fixtures/hushchat/templates/capture-manifest.template.json

@@ -0,0 +1,54 @@
+{
+  "schema": "dragonx.hushchat.capture-manifest.v1",
+  "status": "template",
+  "id": "replace-with-redacted-capture-manifest-id",
+  "fixture_directory": "replace-with-staged-fixture-directory",
+  "dry_run_command": "./build/bin/HushChatFixtureCheck --replacement-dry-run replace-with-staged-fixture-directory",
+  "provenance": {
+    "source_client": "SilentDragonXLite",
+    "source_client_version": "replace-with-release-or-commit",
+    "capture_date": "YYYY-MM-DD",
+    "network": "replace-with-disposable-test-network",
+    "capture_method": "replace-with-redacted-capture-procedure-name"
+  },
+  "handling": {
+    "disposable_wallets_only": true,
+    "non_sensitive_vectors_only": true,
+    "no_passphrases": true,
+    "no_plaintext": true,
+    "no_memo_contents": true,
+    "no_private_keys": true,
+    "no_wallet_files": true,
+    "no_ciphertext_byte_dumps": true,
+    "no_derived_keys": true,
+    "no_session_keys": true,
+    "redacted_report_only": true
+  },
+  "categories": [
+    {
+      "kind": "incoming_memo",
+      "staged_filename": "incoming-memo.ready.json",
+      "status": "template"
+    },
+    {
+      "kind": "outgoing_memo",
+      "staged_filename": "outgoing-memo.ready.json",
+      "status": "template"
+    },
+    {
+      "kind": "seed_public_key_projection",
+      "staged_filename": "seed-public-key-projection.ready.json",
+      "status": "template"
+    },
+    {
+      "kind": "corrupted_auth_failure",
+      "staged_filename": "corrupted-auth-failure.ready.json",
+      "status": "template"
+    },
+    {
+      "kind": "cont_exclusion",
+      "staged_filename": "cont-exclusion.ready.json",
+      "status": "template"
+    }
+  ]
+}