feat: TUI room creation + daemon-side room persistence

/room <name> in the TUI sends create_room to the daemon, which persists
it in the rooms SQLite table and echoes room_created back. state_snapshot
now includes persisted rooms so they survive reconnects. Tab navigation
and room rendering pick them up automatically.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/ipc/ipc.go

@@ -15,6 +15,7 @@ import (
 	"log"
 	"net"
 	"net/http"
+	"strings"
 	"time"
 
 	"nhooyr.io/websocket"
@@ -239,6 +240,23 @@ func handleClient(conn net.Conn, mgr *netmgr.Manager) {
 				})
 			}
 
+		case proto.CmdCreateRoom:
+			n := mgr.Resolve(cmd.NetworkID)
+			if n == nil {
+				send(errMsg("create_room: not joined to any network"))
+				continue
+			}
+			name := strings.TrimSpace(cmd.Room)
+			if name == "" || name == "general" {
+				send(errMsg("create_room: room name is required and cannot be 'general'"))
+				continue
+			}
+			if err := n.Store.SaveRoom(name); err != nil {
+				send(errMsg(fmt.Sprintf("create_room: %v", err)))
+				continue
+			}
+			send(proto.IpcMessage{Type: proto.EvtRoomCreated, NetworkID: n.ID, Room: name})
+
 		case proto.CmdGetState:
 			send(stateSnapshot(mgr))
 
@@ -416,6 +434,11 @@ func stateSnapshot(mgr *netmgr.Manager) proto.IpcMessage {
 		pi := all[0].Identity.PeerInfo()
 		msg.LocalPeer = &pi
 		msg.ConnectedPeers = all[0].Mesh.ConnectedPeers()
+		if extra, err := all[0].Store.Rooms(); err == nil {
+			for _, r := range extra {
+				msg.Rooms = append(msg.Rooms, r)
+			}
+		}
 	}
 
 	return msg

internal/proto/proto.go

@@ -236,6 +236,7 @@ const (
 	CmdAddShare       IpcMsgType = "add_share"        // add a share root; fields: path, networks
 	CmdRemoveShare    IpcMsgType = "remove_share"      // remove a share root; field: path
 	CmdListShares     IpcMsgType = "list_shares"       // returns shares_list event
+	CmdCreateRoom     IpcMsgType = "create_room"       // field: room (name)
 
 	// Events (daemon → UI)
 	EvtMessageReceived  IpcMsgType = "message_received"
@@ -255,6 +256,7 @@ const (
 	EvtIdentityExported IpcMsgType = "identity_exported"
 	EvtIdentityImported IpcMsgType = "identity_imported"
 	EvtSharesList       IpcMsgType = "shares_list"
+	EvtRoomCreated      IpcMsgType = "room_created"    // field: room (name)
 )
 
 // NetworkInfo summarises one joined network for state_snapshot and network_joined events.

internal/store/store.go

@@ -28,6 +28,11 @@ CREATE TABLE IF NOT EXISTS peers (
     alias       TEXT NOT NULL,
     last_seen   DATETIME NOT NULL
 );
+
+CREATE TABLE IF NOT EXISTS rooms (
+    name        TEXT PRIMARY KEY,
+    created_at  DATETIME NOT NULL
+);
 `
 
 // Store is a local SQLite-backed message and peer store.
@@ -119,6 +124,33 @@ func (s *Store) RecentMessages(room string, limit int) ([]proto.ChatMessage, err
 	return msgs, rows.Err()
 }
 
+// SaveRoom persists a room name. Duplicate names are silently ignored.
+func (s *Store) SaveRoom(name string) error {
+	_, err := s.db.Exec(
+		`INSERT OR IGNORE INTO rooms (name, created_at) VALUES (?, ?)`,
+		name, time.Now().UTC(),
+	)
+	return err
+}
+
+// Rooms returns all persisted room names, ordered by creation time.
+func (s *Store) Rooms() ([]string, error) {
+	rows, err := s.db.Query(`SELECT name FROM rooms ORDER BY created_at`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []string
+	for rows.Next() {
+		var name string
+		if err := rows.Scan(&name); err != nil {
+			return nil, err
+		}
+		out = append(out, name)
+	}
+	return out, rows.Err()
+}
+
 // KnownPeers returns all peers seen since this daemon started storing data.
 func (s *Store) KnownPeers() (map[proto.PeerID]string, error) {
 	rows, err := s.db.Query(`SELECT peer_id, alias FROM peers`)