feat(chat): mute conversations (Q10)

Per-conversation mute toggle in the thread header. Muted conversations (tracked
by cid in settings, so it persists) are skipped by chatUnreadCount(), so they
neither raise the nav-item unread badge nor the new-message toast — the toast now
gates on a chatUnreadCount() delta across ingest, which already skips muted cids,
so mute is respected for free. "Block" (rejecting a peer's inbound memos) is a
larger ingest-filter change and is intentionally left out of this pass.

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

src/app_network.cpp

@@ -1233,6 +1233,7 @@ int App::chatUnreadCount() const
     int unread = 0;
     const auto& store = chat_service_.store();
     for (const auto& cid : store.conversationIds()) {
+        if (settings_ && settings_->isChatMuted(cid)) continue;   // muted conversations don't badge (Q10)
         std::int64_t seen = 0;
         const auto it = chat_seen_watermark_.find(cid);
         if (it != chat_seen_watermark_.end()) seen = it->second;
@@ -1688,9 +1689,12 @@ void App::refreshTransactionData()
                 !result.hushChatMetadata.empty()) {
                 std::unordered_map<std::string, std::int64_t> chatTxTimes;
                 for (const auto& tx : result.transactions) chatTxTimes[tx.txid] = tx.timestamp;
+                const int unreadBefore = chatUnreadCount();
                 const int newMsgs = chat_service_.ingest(result.hushChatMetadata, chatTxTimes, std::time(nullptr));
-                if (newMsgs > 0 && current_page_ != ui::NavPage::Chat)
-                    ui::Notifications::instance().info(TR("chat_new_message_toast"));  // Q4: alert when not on the Chat tab
+                // Toast only when a non-muted conversation gained an unread message — chatUnreadCount()
+                // already skips muted cids, so a delta cleanly respects mute (Q10 + Q4).
+                if (newMsgs > 0 && current_page_ != ui::NavPage::Chat && chatUnreadCount() > unreadBefore)
+                    ui::Notifications::instance().info(TR("chat_new_message_toast"));
             }
             NetworkRefreshService::applyTransactionRefreshResult(
                 state_, cacheUpdate, std::move(result), std::time(nullptr));
@@ -1748,9 +1752,12 @@ void App::refreshRecentTransactionData()
                 !result.hushChatMetadata.empty()) {
                 std::unordered_map<std::string, std::int64_t> chatTxTimes;
                 for (const auto& tx : result.transactions) chatTxTimes[tx.txid] = tx.timestamp;
+                const int unreadBefore = chatUnreadCount();
                 const int newMsgs = chat_service_.ingest(result.hushChatMetadata, chatTxTimes, std::time(nullptr));
-                if (newMsgs > 0 && current_page_ != ui::NavPage::Chat)
-                    ui::Notifications::instance().info(TR("chat_new_message_toast"));  // Q4: alert when not on the Chat tab
+                // Toast only when a non-muted conversation gained an unread message — chatUnreadCount()
+                // already skips muted cids, so a delta cleanly respects mute (Q10 + Q4).
+                if (newMsgs > 0 && current_page_ != ui::NavPage::Chat && chatUnreadCount() > unreadBefore)
+                    ui::Notifications::instance().info(TR("chat_new_message_toast"));
             }
             NetworkRefreshService::applyTransactionRefreshResult(
                 state_, cacheUpdate, std::move(result), std::time(nullptr));

src/config/settings.cpp

@@ -147,6 +147,11 @@ bool Settings::load(const std::string& path)
         loadScalar(j, "language", language_);
         loadScalar(j, "skin_id", skin_id_);
         loadScalar(j, "chat_reply_zaddr", chat_reply_zaddr_);
+        if (j.contains("muted_chat_cids") && j["muted_chat_cids"].is_array()) {
+            muted_chat_cids_.clear();
+            for (const auto& c : j["muted_chat_cids"])
+                if (c.is_string()) muted_chat_cids_.push_back(c.get<std::string>());
+        }
         loadScalar(j, "acrylic_enabled", acrylic_enabled_);
         loadScalar(j, "acrylic_quality", acrylic_quality_);
         loadScalar(j, "blur_multiplier", blur_multiplier_);
@@ -422,6 +427,9 @@ bool Settings::save(const std::string& path)
     j["language"] = language_;
     j["skin_id"] = skin_id_;
     j["chat_reply_zaddr"] = chat_reply_zaddr_;
+    j["muted_chat_cids"] = json::array();
+    for (const auto& c : muted_chat_cids_)
+        j["muted_chat_cids"].push_back(c);
     j["acrylic_enabled"] = acrylic_enabled_;
     j["acrylic_quality"] = acrylic_quality_;
     j["blur_multiplier"] = blur_multiplier_;

src/config/settings.h

@@ -118,6 +118,18 @@ public:
     std::string getChatReplyZaddr() const { return chat_reply_zaddr_; }
     void setChatReplyZaddr(const std::string& z) { chat_reply_zaddr_ = z; }
 
+    // Muted chat conversations (by cid) — muted conversations don't badge or raise a toast (Q10).
+    bool isChatMuted(const std::string& cid) const {
+        return std::find(muted_chat_cids_.begin(), muted_chat_cids_.end(), cid) != muted_chat_cids_.end();
+    }
+    void setChatMuted(const std::string& cid, bool muted) {
+        const bool already = isChatMuted(cid);
+        if (muted && !already) muted_chat_cids_.push_back(cid);
+        else if (!muted && already)
+            muted_chat_cids_.erase(std::remove(muted_chat_cids_.begin(), muted_chat_cids_.end(), cid),
+                                   muted_chat_cids_.end());
+    }
+
     // Privacy
     bool getSaveZtxs() const { return save_ztxs_; }
     void setSaveZtxs(bool save) { save_ztxs_ = save; }
@@ -473,6 +485,7 @@ private:
     std::string theme_ = "dragonx";
     std::string skin_id_ = "dragonx";
     std::string chat_reply_zaddr_;
+    std::vector<std::string> muted_chat_cids_;   // muted chat conversations by cid (Q10)
     bool save_ztxs_ = true;
     bool auto_shield_ = true;
     bool use_tor_ = false;

src/ui/windows/chat_tab.cpp

@@ -11,6 +11,7 @@
 #include "../../chat/chat_service.h"
 #include "../../util/i18n.h"
 #include "../../util/platform.h"        // getConfigDir + writeFileAtomically — conversation export (Q11)
+#include "../../config/settings.h"       // per-conversation mute (Q10)
 #include "../material/colors.h"
 #include "../material/color_theme.h"   // WithAlpha
 #include "../material/type.h"
@@ -431,6 +432,13 @@ void RenderChatTab(App* app)
                     else
                         Notifications::instance().error(TR("chat_export_failed"));
                 }
+                // Mute toggle — muted conversations don't badge or toast (Q10). Persisted to settings.
+                ImGui::SameLine();
+                const bool muted = app->settings() && app->settings()->isChatMuted(sel->cid);
+                if (ImGui::SmallButton(muted ? TR("chat_unmute") : TR("chat_mute")) && app->settings()) {
+                    app->settings()->setChatMuted(sel->cid, !muted);
+                    app->settings()->save();
+                }
             }
             ImGui::Separator();