fix(parsers): harden RPC/price/updater parsing against valid-but-unhandled input

Audit of the full-node RPC response parsers and updater release-body parsers
(find -> adversarially-verify workflow) surfaced three worth fixing; three
others guard formats the project doesn't emit and are backstopped by signature
verification, so they're documented rather than churned.

- Price (Medium): parseCoinGeckoPriceResponse used .value(key, 0.0), which
  throws type_error on a PRESENT null. CoinGecko emits null for usd_24h_change/
  usd_24h_vol on illiquid tokens (DRGX is one) while still returning a valid
  spot price; the outer catch turned that into no price update at all. Read
  null-tolerantly so the valid usd/btc survives.

- Daemon updater (Medium): parseDaemonChecksums blanked '|'/backtick but not
  markdown emphasis, so a bolded **archive.zip** checksum row was dropped and a
  valid, correctly-signed release would be refused. Also blank '*'/'_' (cannot
  cause a wrong-asset match; the 64-hex + .zip-suffix tests are unchanged).

- Opid poll (Low, severe failure mode): parseOperationStatusPoll read id/status
  via .value() (throws on a present non-string) and the call site parsed OUTSIDE
  its try/catch, so a throw left opid_poll_in_progress_ stuck true and wedged all
  z-operation polling for the session. Type-check the reads and parse inside the
  guard. (dragonxd can't emit non-string id/status; this is defense-in-depth.)

Regression tests: CoinGecko null field; opid non-string id/status; **bold**
checksum row. Suite green (1/1).

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

src/app.cpp

@@ -1129,6 +1129,7 @@ void App::update()
             auto* rpc = (fast_rpc_ && fast_rpc_->isConnected()) ? fast_rpc_.get() : rpc_.get();
             if (!rpc) return [this](){ opid_poll_in_progress_ = false; };
             json result;
+            services::NetworkRefreshService::OperationStatusPollResult parsed;
             try {
                 rpc::RPCClient::TraceScope trace("Send tab / Operation status");
                 // No per-opid filter: this daemon rejects z_getoperationstatus(["opid"]) with
@@ -1136,10 +1137,12 @@ void App::update()
                 // "Waiting for operation". The no-arg form returns ALL operations;
                 // parseOperationStatusPoll() filters down to the opids we're tracking.
                 result = rpc->call("z_getoperationstatus", json::array());
+                // Parse INSIDE the guard: a malformed/type-anomalous element must never abort the
+                // poll and leave opid_poll_in_progress_ stuck true for the whole connected session.
+                parsed = services::NetworkRefreshService::parseOperationStatusPoll(result, opids);
             } catch (...) {
                 return [this](){ opid_poll_in_progress_ = false; };
             }
-            auto parsed = services::NetworkRefreshService::parseOperationStatusPoll(result, opids);
             return [this, parsed = std::move(parsed)]() mutable {
                 opid_poll_in_progress_ = false;
 

src/services/network_refresh_service.cpp

@@ -426,12 +426,21 @@ std::optional<NetworkRefreshService::PriceRefreshResult> NetworkRefreshService::
         if (!parsed.contains("dragonx-2")) return std::nullopt;
 
         const auto& data = parsed["dragonx-2"];
+        // CoinGecko emits JSON null (not an omitted key) for fields it can't currently compute —
+        // commonly usd_24h_change on illiquid/newly-listed tokens — while still returning a valid
+        // spot price in the same object. .value(key, default) throws type_error on a PRESENT null,
+        // which the outer catch turns into "no price update at all", so read null-tolerantly and
+        // keep the valid usd/btc rather than discarding the whole refresh.
+        auto num = [&data](const char* key, double def) {
+            auto it = data.find(key);
+            return (it != data.end() && it->is_number()) ? it->get<double>() : def;
+        };
         PriceRefreshResult result;
-        result.market.price_usd = data.value("usd", 0.0);
-        result.market.price_btc = data.value("btc", 0.0);
-        result.market.change_24h = data.value("usd_24h_change", 0.0);
-        result.market.volume_24h = data.value("usd_24h_vol", 0.0);
-        result.market.market_cap = data.value("usd_market_cap", 0.0);
+        result.market.price_usd = num("usd", 0.0);
+        result.market.price_btc = num("btc", 0.0);
+        result.market.change_24h = num("usd_24h_change", 0.0);
+        result.market.volume_24h = num("usd_24h_vol", 0.0);
+        result.market.market_cap = num("usd_market_cap", 0.0);
 
         char buf[64];
         // Runs on the RPC worker thread — std::localtime shares a process-wide static tm, so use the
@@ -1101,12 +1110,16 @@ NetworkRefreshService::OperationStatusPollResult NetworkRefreshService::parseOpe
     std::set<std::string> reported;
     for (const auto& op : result) {
         if (!op.is_object()) continue;
-        std::string opid = op.value("id", std::string());
+        // Type-checked reads: .value(key, default) throws if the key is PRESENT with a non-string
+        // type, which would abort the whole poll (and wedge it for the session — see the call site).
+        if (!op.contains("id") || !op["id"].is_string()) continue;
+        std::string opid = op["id"].get<std::string>();
         if (opid.empty()) continue;
         if (requested.find(opid) == requested.end()) continue;  // not one of ours — ignore
         reported.insert(opid);
 
-        std::string status = op.value("status", std::string());
+        std::string status = (op.contains("status") && op["status"].is_string())
+                                 ? op["status"].get<std::string>() : std::string();
         if (status == "success") {
             parsed.doneOpids.push_back(opid);
             parsed.anySuccess = true;

src/util/daemon_updater_core.cpp

@@ -140,15 +140,16 @@ std::map<std::string, std::string> parseDaemonChecksums(const std::string& body)
     //   | File | SHA-256 |
     //   |------|---------|
     //   | dragonx-1.0.2-linux-amd64.zip | `85f1dd…16` |
-    // Per line: blank out the table/code delimiters ('|' and '`'), then find the 64-hex token (the
-    // hash) and a token ending in ".zip" (the archive name). Header/separator/prose rows lack one
-    // or the other and are skipped, so this is robust to surrounding text and column order.
+    // Per line: blank out the table/code/emphasis delimiters ('|', '`', and markdown '*'/'_' so a
+    // bolded **archive.zip** still tokenizes), then find the 64-hex token (the hash) and a token
+    // ending in ".zip" (the archive name). Header/separator/prose rows lack one or the other and are
+    // skipped, so this is robust to surrounding text and column order.
     std::map<std::string, std::string> out;
     std::istringstream in(body);
     std::string line;
     while (std::getline(in, line)) {
         for (char& c : line)
-            if (c == '|' || c == '`') c = ' ';
+            if (c == '|' || c == '`' || c == '*' || c == '_') c = ' ';
         std::istringstream ls(line);
         std::string tok, hash, name;
         while (ls >> tok) {