fix(lite): gateway refresh degrades gracefully on a failed command

LiteWalletGateway::refresh() aborted the entire refresh on the first command whose bridge
call or parse failed — which turned a single real-backend shape mismatch (e.g. syncstatus)
into a total, empty-everything refresh. Since the balance/addresses/list real shapes are
still unverified and we've already hit shape drift twice, make refresh resilient:

- Run every planned command; assembleLiteWalletRefreshBundle already skips failed results.
- result.ok = any usable data came back (bundle.complete still reflects all-succeeded).
- One command's failure now degrades gracefully — the other sections still populate.

testLiteWalletGatewayRefreshSkipsFailedCommand (fake balance returns invalid JSON) asserts
the refresh still succeeds with addresses/transactions/info populated and balance skipped.

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

tests/fake_lite_backend.h

@@ -33,6 +33,7 @@ inline bool g_liteFakeWalletExists = true;
 inline bool g_liteFakeServerOnline = true;
 inline bool g_liteFakeShutdownCalled = false;
 inline std::atomic<bool> g_liteFakeSyncBlock{false};  // when true, the "sync" command blocks
+inline std::atomic<bool> g_liteFakeBadBalance{false}; // when true, "balance" returns invalid JSON
 
 inline void resetLiteFakeCounters()
 {
@@ -76,6 +77,8 @@ inline char* liteFakeExecute(const char* command, const char*)
         }
         if (std::strcmp(c, "syncstatus") == 0)  // real backend shape: "syncing" is a string
             return liteFakeDup("{\"syncing\":\"true\",\"synced_blocks\":1000,\"total_blocks\":1000}");
+        if (std::strcmp(c, "balance") == 0 && g_liteFakeBadBalance.load())
+            return liteFakeDup("not-json");  // simulate a shape/parse failure for one command
         if (std::strcmp(c, "balance") == 0)
             return liteFakeDup("{\"tbalance\":100000000,\"zbalance\":200000000,\"unconfirmed\":50000000,"
                                "\"verified_zbalance\":180000000,\"spendable_zbalance\":170000000}");