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/lite/result_parsers.json

@@ -0,0 +1,107 @@
+{
+  "info": {
+    "chain_name": "dragonx",
+    "version": "0.1.0",
+    "vendor": "SilentDragonXLite",
+    "latest_block_height": 250001,
+    "difficulty": 42,
+    "longestchain": 250003,
+    "notarized": 249990
+  },
+  "height_object": {
+    "height": 250004
+  },
+  "height_number": 250005,
+  "balance": {
+    "tbalance": 125000000,
+    "zbalance": 230000000,
+    "unconfirmed": 5000000,
+    "verified_zbalance": 180000000,
+    "spendable_zbalance": 170000000
+  },
+  "addresses": {
+    "z_addresses": [
+      "zs1parserfixture0000000000000000000000000000000000000000000000000000",
+      "zs1parserfixture1111111111111111111111111111111111111111111111111111"
+    ],
+    "t_addresses": [
+      "RParserFixtureTransparentAddress0000000000001"
+    ]
+  },
+  "notes": {
+    "unspent_notes": [
+      {
+        "address": "zs1parserfixture0000000000000000000000000000000000000000000000000000",
+        "created_in_block": 249900,
+        "created_in_txid": "note-txid-1",
+        "value": 100000000,
+        "spent": false,
+        "unconfirmed_spent": false
+      }
+    ],
+    "utxos": [
+      {
+        "address": "RParserFixtureTransparentAddress0000000000001",
+        "created_in_block": 249901,
+        "created_in_txid": "utxo-txid-1",
+        "value": 25000000,
+        "spent": false,
+        "unconfirmed_spent": true
+      }
+    ],
+    "pending_notes": [
+      {
+        "address": "zs1parserfixture1111111111111111111111111111111111111111111111111111",
+        "created_in_block": 0,
+        "created_in_txid": "pending-note-txid-1",
+        "value": 30000000,
+        "spent": false,
+        "unconfirmed_spent": false
+      }
+    ],
+    "pending_utxos": [
+      {
+        "address": "RParserFixtureTransparentAddress0000000000001",
+        "created_in_block": 0,
+        "created_in_txid": "pending-utxo-txid-1",
+        "value": 12000000,
+        "spent": false,
+        "unconfirmed_spent": false
+      }
+    ]
+  },
+  "list": [
+    {
+      "txid": "sent-txid-1",
+      "datetime": 1710000000,
+      "block_height": 249950,
+      "unconfirmed": false,
+      "outgoing_metadata": [
+        {
+          "address": "zs1recipientfixture0000000000000000000000000000000000000000000000",
+          "value": 75000000,
+          "memo": "outgoing memo"
+        },
+        {
+          "address": "RRecipientTransparentFixture000000000000001",
+          "value": 5000000,
+          "memo": "transparent memo"
+        }
+      ]
+    },
+    {
+      "txid": "receive-txid-1",
+      "datetime": 1710001000,
+      "block_height": 0,
+      "unconfirmed": true,
+      "address": "zs1parserfixture1111111111111111111111111111111111111111111111111111",
+      "amount": 42000000,
+      "memo": "incoming memo",
+      "position": 2
+    }
+  ],
+  "syncstatus": {
+    "synced_blocks": 125002,
+    "total_blocks": 250004
+  }
+}