feat(chat): add a "Copy my chat address" button

The conversation header only copies a PEER's address, so a user had no way to
hand out their own chat address for others to message them. Add a "Copy my chat
address" link in the left pane (public App::chatMyAddress() forwards the stable
seed-derived reply z-address; copied on click only, with an "address copied"
toast and a warning if none exists yet).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app.h

@@ -302,6 +302,9 @@ public:
     wallet::LiteWalletController* liteWallet() { return lite_wallet_.get(); }
     // HushChat service (identity + in-memory message store); the Chat tab reads its store.
     chat::ChatService& chatService() { return chat_service_; }
+    // Public forwarder for the UI: the wallet z-address others use to reach this user in chat. Call on
+    // click (not per-frame) — the underlying chatReplyZaddr() may persist a freshly chosen address.
+    std::string chatMyAddress() { return chatReplyZaddr(); }
     // Why the Chat tab has no identity yet, so it can show the right prompt instead of always
     // "unlock your wallet". Locked = encrypted & locked (seed unreadable); Preparing = unlocked and
     // deriving the identity (fetch in flight, or waiting on the node / address list); Unavailable =

src/services/network_refresh_service.cpp

@@ -2,6 +2,7 @@
 #include "history_scan_policy.h"
 #include "rpc/rpc_busy_gate.h"
 #include "../util/logger.h"
+#include "../util/i18n.h"   // util::tr for the price-fetch-failed default
 
 #include <algorithm>
 #include <cctype>
@@ -1995,7 +1996,7 @@ void NetworkRefreshService::applyPriceRefreshFailure(WalletState& state,
 {
     state.market.price_loading = false;
     state.market.price_error = errorMessage.empty()
-        ? std::string("Price fetch failed")
+        ? std::string(util::tr("market_price_fetch_failed"))
         : errorMessage;
 }
 

src/ui/windows/chat_tab.cpp

@@ -916,6 +916,24 @@ void RenderChatTab(App* app)
             if (ImGui::SmallButton(bl.c_str())) s_show_blocked = true;
             ImGui::PopStyleColor();
         }
+        // "Copy my chat address" — the address others use to reach this user. The conversation header
+        // only copies a PEER's address, so without this there's no way to hand out your own. Copies on
+        // click only (chatMyAddress may persist a freshly chosen address).
+        {
+            ImGui::PushStyleColor(ImGuiCol_Text, material::OnSurfaceMedium());
+            // Text-only: SmallButton uses the body font, which has no Material icon glyph (would show "?").
+            if (ImGui::SmallButton(TR("chat_copy_my_address"))) {
+                std::string myAddr = app->chatMyAddress();
+                if (myAddr.empty()) {
+                    Notifications::instance().warning(TR("chat_no_my_address"));
+                } else {
+                    ImGui::SetClipboardText(myAddr.c_str());
+                    Notifications::instance().info(TR("address_copied"));
+                }
+            }
+            ImGui::PopStyleColor();
+            if (ImGui::IsItemHovered()) material::Tooltip("%s", TR("chat_my_address_tip"));
+        }
         const std::string search = s_search;
         ImGui::Separator();
         if (convs.empty()) {

src/ui/windows/market_tab.cpp

@@ -31,6 +31,7 @@
 #include <algorithm>
 #include <cmath>
 #include <ctime>
+#include <chrono>
 #include <unordered_set>
 
 namespace dragonx {
@@ -1496,7 +1497,18 @@ static void mktDrawPriceHero(const MktCtx& cx)
         // ---- HERO PRICE (large, prominent) ----
         ImFont* h3 = Type().h3();
         std::string priceStr = FormatPrice(heroPrice);
-        ImU32 priceCol = Success();
+        // Stale-price cue: the aggregate price is kept on a failed/old refresh (it's never cleared), so a
+        // green number can be hours out of date. Flag it amber when the last refresh failed or the
+        // aggregate is >=5 min old. Only when the hero IS the aggregate (an exchange pair has its own feed).
+        const bool haveFetch = market.last_fetch_time.time_since_epoch().count() != 0;
+        const long ageMin = haveFetch
+            ? (long)std::chrono::duration_cast<std::chrono::minutes>(
+                  std::chrono::steady_clock::now() - market.last_fetch_time).count()
+            : 0;
+        const bool usingAggregate = (heroPrice == market.price_usd);
+        const bool priceStale = usingAggregate && haveFetch &&
+                                (!market.price_error.empty() || ageMin >= 5);
+        ImU32 priceCol = priceStale ? Warning() : Success();
         DrawTextShadow(dl, h3, h3->LegacySize, ImVec2(cx0, cy), priceCol, priceStr.c_str());
 
         // Ticker label after price
@@ -1519,6 +1531,29 @@ static void mktDrawPriceHero(const MktCtx& cx)
         dl->AddRectFilled(bMin, bMax, badgeBg, 4.0f * dp);
         dl->AddText(capFont, capFont->LegacySize, ImVec2(bMin.x + badgePadH, bMin.y + badgePadV), chgCol, buf);
 
+        // Stale "as of Nh ago" caption + hover tooltip, right of the change badge (cursor saved/restored
+        // so the custom draw-list layout below is undisturbed).
+        if (priceStale) {
+            char age[64];
+            if (ageMin >= 60) snprintf(age, sizeof(age), TR("market_price_stale_hour"), (int)(ageMin / 60));
+            else              snprintf(age, sizeof(age), TR("market_price_stale_min"), (int)std::max(1L, ageMin));
+            ImVec2 asz = capFont->CalcTextSizeA(capFont->LegacySize, FLT_MAX, 0, age);
+            float ax = bMax.x + Layout::spacingMd();
+            float limit = cardMax.x - pad - 260.0f * dp;   // reserve the trade pill + chart toggles
+            if (ax + asz.x < limit) {
+                dl->AddText(capFont, capFont->LegacySize, ImVec2(ax, bMin.y + badgePadV), Warning(), age);
+                ImVec2 sv = ImGui::GetCursorScreenPos();
+                ImGui::SetCursorScreenPos(ImVec2(ax, bMin.y));
+                ImGui::InvisibleButton("##PriceStale", ImVec2(asz.x, bMax.y - bMin.y));
+                if (ImGui::IsItemHovered()) {
+                    std::string tip = market.price_error.empty()
+                        ? std::string(TR("market_price_fetch_failed")) : market.price_error;
+                    material::Tooltip(TR("market_price_stale_tip"), tip.c_str());
+                }
+                ImGui::SetCursorScreenPos(sv);
+            }
+        }
+
         // (Divider is drawn in the chart block, below the interval buttons.)
 
         // ---- TRADE BUTTON (top-right of card) ----

src/util/i18n.cpp

@@ -263,6 +263,9 @@ void I18n::loadBuiltinEnglish()
         strings_["chat_jump_latest"] = "Latest";
         strings_["chat_empty_title"] = "No conversations yet";
         strings_["chat_empty_start"] = "Start one with \"New conversation\".";
+        strings_["chat_copy_my_address"] = "Copy my chat address";
+        strings_["chat_my_address_tip"] = "Share this address so others can message you";
+        strings_["chat_no_my_address"] = "No chat address yet";
         strings_["chat_search"] = "Search conversations";
         strings_["chat_no_matches"] = "No conversations match your search.";
         strings_["chat_export"] = "Export chat\xE2\x80\xA6";
@@ -2222,6 +2225,10 @@ void I18n::loadBuiltinEnglish()
         strings_["market_24h_change"] = "24h";
         strings_["market_price_loading"] = "Loading price data...";
         strings_["market_price_unavailable"] = "Price data unavailable";
+        strings_["market_price_fetch_failed"] = "Price fetch failed";
+        strings_["market_price_stale_min"] = "as of %d min ago";
+        strings_["market_price_stale_hour"] = "as of %dh ago";
+        strings_["market_price_stale_tip"] = "Showing the last known price. The latest refresh failed: %s";
         strings_["market_refresh_price"] = "Refresh price data";
         strings_["market_trade_on"] = "Trade on %s";