chatgui: rlottie animated emoji with hover-to-animate, drag-to-select

- Add LottieIcon class (TGS gzip decompress + rlottie C API render)
- Add AnimTimer singleton (33ms tick, activate/deactivate refcount)
- Add EmojiButton (hover-triggered animation in emoji picker)
- Add AnimatedEmoji support to EmojiData (5 TGS mappings)
- MessageDelegate: QTextLayout-based animated emoji overlay (text + reactions)
- ChatView: drag-to-select (click deselects, 5px drag starts selection)
- ChatView: hoveredIndexChanged signal for hover-triggered animations
- MessageList: wire AnimTimer tick to viewport update, hover → activate
- CMake: AUTORCC, rlottie, zlib dependencies
- Add 5 TGS animations as Qt resources

tools/chatgui/db/db_manager.cpp

@@ -0,0 +1,116 @@
+#include "db_manager.h"
+#include "../src/debug_ui.h"
+
+DbManager::DbManager(const QString& path, QObject* parent)
+    : QObject(parent)
+{
+    int rc = sqlite3_open(path.toUtf8().constData(), &m_db);
+    if (rc != SQLITE_OK) {
+        GUI_ERROR("Cannot open database: %s", sqlite3_errmsg(m_db));
+        sqlite3_close(m_db);
+        m_db = nullptr;
+        return;
+    }
+
+    sqlite3_exec(m_db, "PRAGMA journal_mode=WAL", nullptr, nullptr, nullptr);
+
+    initTables();
+
+    GUI_INFO("Database opened: %s", path.toUtf8().constData());
+}
+
+DbManager::~DbManager() {
+    if (m_db) {
+        sqlite3_close(m_db);
+        m_db = nullptr;
+        GUI_INFO("Database closed");
+    }
+}
+
+void DbManager::initTables() {
+    sqlite3_exec(m_db, "PRAGMA foreign_keys = ON", nullptr, nullptr, nullptr);
+
+    const char* sql =
+        "CREATE TABLE IF NOT EXISTS local_identity ("
+        "  id              INTEGER PRIMARY KEY CHECK (id = 1),"
+        "  node_id         INTEGER NOT NULL UNIQUE,"
+        "  name            TEXT NOT NULL,"
+        "  x25519_pubkey   BLOB NOT NULL,"
+        "  ed25519_pubkey  BLOB,"
+        "  created_at      TEXT DEFAULT (datetime('now')),"
+        "  updated_at      TEXT DEFAULT (datetime('now'))"
+        ");"
+
+        "CREATE TABLE IF NOT EXISTS nodes ("
+        "  node_id         INTEGER PRIMARY KEY,"
+        "  name            TEXT,"
+        "  x25519_pubkey   BLOB,"
+        "  ed25519_pubkey  BLOB,"
+        "  hop_count       INTEGER DEFAULT 0,"
+        "  is_online       INTEGER DEFAULT 0,"
+        "  last_seen_ver   INTEGER DEFAULT 0,"
+        "  connectivity_json TEXT,"
+        "  created_at      TEXT DEFAULT (datetime('now')),"
+        "  updated_at      TEXT DEFAULT (datetime('now'))"
+        ");"
+
+        "CREATE TABLE IF NOT EXISTS node_addresses ("
+        "  id              INTEGER PRIMARY KEY AUTOINCREMENT,"
+        "  node_id         INTEGER NOT NULL REFERENCES nodes(node_id) ON DELETE CASCADE,"
+        "  family          INTEGER NOT NULL DEFAULT 4,"
+        "  ip              BLOB NOT NULL,"
+        "  port            INTEGER NOT NULL,"
+        "  addr_type       INTEGER NOT NULL DEFAULT 0,"
+        "  socket_type     INTEGER DEFAULT 0,"
+        "  priority        INTEGER DEFAULT 0"
+        ");"
+        "CREATE INDEX IF NOT EXISTS idx_node_addr_node ON node_addresses(node_id);"
+
+        "CREATE TABLE IF NOT EXISTS node_subnets ("
+        "  id              INTEGER PRIMARY KEY AUTOINCREMENT,"
+        "  node_id         INTEGER NOT NULL REFERENCES nodes(node_id) ON DELETE CASCADE,"
+        "  family          INTEGER NOT NULL DEFAULT 4,"
+        "  network         BLOB NOT NULL,"
+        "  prefix_length   INTEGER NOT NULL"
+        ");"
+        "CREATE INDEX IF NOT EXISTS idx_subnet_node ON node_subnets(node_id);"
+
+        "CREATE TABLE IF NOT EXISTS channels ("
+        "  id              INTEGER PRIMARY KEY AUTOINCREMENT,"
+        "  channel_id      TEXT NOT NULL UNIQUE,"
+        "  name            TEXT NOT NULL,"
+        "  member_ids_json TEXT NOT NULL,"
+        "  is_dm           INTEGER DEFAULT 0,"
+        "  last_message    TEXT,"
+        "  last_msg_at     TEXT,"
+        "  created_at      TEXT DEFAULT (datetime('now'))"
+        ");"
+        "CREATE UNIQUE INDEX IF NOT EXISTS idx_channel_cid ON channels(channel_id);"
+
+        "CREATE TABLE IF NOT EXISTS messages ("
+        "  id              INTEGER PRIMARY KEY AUTOINCREMENT,"
+        "  channel_id      TEXT NOT NULL REFERENCES channels(channel_id) ON DELETE CASCADE,"
+        "  author_node_id  INTEGER NOT NULL,"
+        "  content         TEXT NOT NULL,"
+        "  content_type    TEXT DEFAULT 'text/plain',"
+        "  timestamp       INTEGER NOT NULL,"
+        "  local_seq       INTEGER DEFAULT 0,"
+        "  signature       BLOB,"
+        "  is_outgoing     INTEGER DEFAULT 0,"
+        "  is_read         INTEGER DEFAULT 0,"
+        "  created_at      TEXT DEFAULT (datetime('now'))"
+        ");"
+        "CREATE INDEX IF NOT EXISTS idx_msg_channel_time ON messages(channel_id, timestamp);"
+        "CREATE INDEX IF NOT EXISTS idx_msg_author ON messages(author_node_id);"
+        "CREATE UNIQUE INDEX IF NOT EXISTS idx_msg_dedup ON messages(channel_id, author_node_id, timestamp);";
+
+    char* errMsg = nullptr;
+    int rc = sqlite3_exec(m_db, sql, nullptr, nullptr, &errMsg);
+    if (rc != SQLITE_OK) {
+        GUI_ERROR("Failed to create tables: %s", errMsg);
+        sqlite3_free(errMsg);
+        return;
+    }
+
+    GUI_INFO("Database tables initialized (6 tables, 6 indexes)");
+}