fix: send stored history to IPC client on connect

history_loaded events were fired when peers exchanged history gossip,
but the browser UI often connects to the daemon after that handshake
has already happened. Now the daemon pushes recent messages for all
known rooms immediately after the state_snapshot on each new IPC
connection, so the browser always gets history regardless of timing.

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

internal/ipc/ipc.go

@@ -127,6 +127,8 @@ func handleClient(conn net.Conn, mgr *netmgr.Manager) {
 
 	// Send initial state snapshot.
 	send(stateSnapshot(mgr))
+	// Send stored history for each room so the UI is populated on connect.
+	sendStoredHistory(mgr, send)
 
 	scanner := bufio.NewScanner(conn)
 	for scanner.Scan() {
@@ -462,6 +464,34 @@ func stateSnapshot(mgr *netmgr.Manager) proto.IpcMessage {
 	return msg
 }
 
+// sendStoredHistory pushes recent messages for all known rooms to a newly-connected IPC client.
+func sendStoredHistory(mgr *netmgr.Manager, send func(proto.IpcMessage)) {
+	all := mgr.All()
+	if len(all) == 0 {
+		return
+	}
+	n := all[0] // use first network; multi-network history follows same pattern
+	if n.Store == nil {
+		return
+	}
+	rooms := []string{"general"}
+	if extra, err := n.Store.Rooms(); err == nil {
+		rooms = append(rooms, extra...)
+	}
+	for _, room := range rooms {
+		msgs, err := n.Store.RecentMessagesSince(room, 0, 200)
+		if err != nil || len(msgs) == 0 {
+			continue
+		}
+		send(proto.IpcMessage{
+			Type:      proto.EvtHistoryLoaded,
+			NetworkID: n.ID,
+			Room:      room,
+			Messages:  msgs,
+		})
+	}
+}
+
 func errMsg(s string) proto.IpcMessage {
 	return proto.IpcMessage{Type: proto.EvtError, ErrorMessage: s}
 }

internal/mesh/transfer.go

@@ -91,6 +91,47 @@ func writePartialMeta(path string, t *inboundTransfer) {
 	os.WriteFile(path, data, 0o644) //nolint:errcheck
 }
 
+// ScanResumable scans the download directory for .tmp.meta sidecars left by
+// interrupted transfers and emits a resumable_transfers IPC event listing them.
+// Called once after a network is joined so the UI can show pending transfers.
+func (m *Mesh) ScanResumable() {
+	if m.DownloadDir == "" {
+		return
+	}
+	metas, _ := filepath.Glob(filepath.Join(m.DownloadDir, "*.tmp.meta"))
+	var files []proto.ResumableFile
+	for _, mp := range metas {
+		data, err := os.ReadFile(mp)
+		if err != nil {
+			continue
+		}
+		var meta partialMeta
+		if err := json.Unmarshal(data, &meta); err != nil {
+			continue
+		}
+		tp := strings.TrimSuffix(mp, ".meta")
+		info, err := os.Stat(tp)
+		if err != nil {
+			continue
+		}
+		files = append(files, proto.ResumableFile{
+			Name:   meta.Name,
+			SHA256: meta.SHA256,
+			From:   meta.From,
+			Size:   meta.Size,
+			Offset: info.Size(),
+		})
+	}
+	if len(files) == 0 {
+		return
+	}
+	m.emit(proto.IpcMessage{
+		Type:           proto.EvtResumableTransfers,
+		ResumableFiles: files,
+	})
+	log.Printf("transfer: %d resumable transfer(s) found in %s", len(files), m.DownloadDir)
+}
+
 // OfferFile reads filename from ShareDir, computes its SHA-256, and sends a
 // file-offer to peerID over the existing "yaw" DataChannel.
 func (m *Mesh) OfferFile(peerID proto.PeerID, filename string) error {

internal/netmgr/manager.go

@@ -162,6 +162,8 @@ func (mgr *Manager) Join(name, shareDir string) (string, error) {
 		}()
 	}
 
+	go m.ScanResumable()
+
 	mgr.emit(proto.IpcMessage{
 		Type:        proto.EvtNetworkJoined,
 		NetworkID:   netID,
@@ -249,6 +251,8 @@ func (mgr *Manager) JoinByHash(netHash64, shareDir string) (string, error) {
 		}()
 	}
 
+	go m.ScanResumable()
+
 	mgr.emit(proto.IpcMessage{
 		Type:        proto.EvtNetworkJoined,
 		NetworkID:   netID,

internal/proto/proto.go

@@ -99,6 +99,15 @@ type PeerMessage struct {
 	HistoryDone bool           `json:"history_done,omitempty"`
 }
 
+// ResumableFile describes a partially-downloaded file found on daemon startup.
+type ResumableFile struct {
+	Name   string `json:"name"`
+	SHA256 string `json:"sha256"`
+	From   string `json:"from"`    // peer ID hex
+	Size   int64  `json:"size"`
+	Offset int64  `json:"offset"`  // bytes already received
+}
+
 // HistoryEntry is one message in a history_chunk response.
 type HistoryEntry struct {
 	Mid       string `json:"mid"`
@@ -292,6 +301,7 @@ const (
 	EvtSharesList       IpcMsgType = "shares_list"
 	EvtRoomCreated      IpcMsgType = "room_created"    // field: room (name)
 	EvtHistoryLoaded      IpcMsgType = "history_loaded"       // fields: room, messages
+	EvtResumableTransfers IpcMsgType = "resumable_transfers"  // field: resumable_files
 )
 
 // NetworkInfo summarises one joined network for state_snapshot and network_joined events.
@@ -347,6 +357,7 @@ type IpcMessage struct {
 	InviteGenerated string      `json:"invite,omitempty"`
 	Files          []FileEntry    `json:"files,omitempty"`
 	Messages        []ChatMessage   `json:"messages,omitempty"`          // history_loaded
+	ResumableFiles  []ResumableFile `json:"resumable_files,omitempty"`   // resumable_transfers
 	Shares         []ShareEntry `json:"shares,omitempty"`
 	ShareNetworks  []string     `json:"network_ids,omitempty"` // for add_share command: scope to specific network IDs, or ["*"] for global
 	// export_identity / import_identity

internal/store/store.go

@@ -107,7 +107,7 @@ func (s *Store) PeerAlias(peerID proto.PeerID) string {
 // RecentMessages returns up to limit messages for a room, oldest first.
 func (s *Store) RecentMessages(room string, limit int) ([]proto.ChatMessage, error) {
 	return s.queryMessages(
-		`SELECT mid, from_peer, body, sent_at FROM messages
+		`SELECT mid, from_peer, room, body, sent_at FROM messages
 		 WHERE room = ?
 		 ORDER BY sent_at DESC LIMIT ?`,
 		room, limit,
@@ -115,15 +115,23 @@ func (s *Store) RecentMessages(room string, limit int) ([]proto.ChatMessage, err
 }
 
 // RecentMessagesSince returns up to limit messages for a room with ts > sinceMs, oldest first.
-// Only messages that have a msg_id (i.e. gossip-safe) are returned.
+// sinceMs == 0 returns the most recent messages regardless of timestamp.
 func (s *Store) RecentMessagesSince(room string, sinceMs int64, limit int) ([]proto.ChatMessage, error) {
 	if limit <= 0 || limit > 500 {
 		limit = 500
 	}
+	if sinceMs == 0 {
+		return s.queryMessages(
+			`SELECT mid, from_peer, room, body, sent_at FROM messages
+			 WHERE room = ?
+			 ORDER BY sent_at DESC LIMIT ?`,
+			room, limit,
+		)
+	}
 	since := time.UnixMilli(sinceMs).UTC()
 	return s.queryMessages(
-		`SELECT mid, from_peer, body, sent_at FROM messages
+		`SELECT mid, from_peer, room, body, sent_at FROM messages
-		 WHERE room = ? AND sent_at > ? AND msg_id IS NOT NULL
+		 WHERE room = ? AND sent_at > ?
 		 ORDER BY sent_at DESC LIMIT ?`,
 		room, since, limit,
 	)
@@ -141,7 +149,7 @@ func (s *Store) queryMessages(q string, args ...any) ([]proto.ChatMessage, error
 		var m proto.ChatMessage
 		var from string
 		var sentAt time.Time
-		if err := rows.Scan(&m.Mid, &from, &m.Text, &sentAt); err != nil {
+		if err := rows.Scan(&m.Mid, &from, &m.Room, &m.Text, &sentAt); err != nil {
 			return nil, err
 		}
 		m.From = proto.PeerID(from)

web/src/App.css

@@ -158,3 +158,5 @@ details summary { color: var(--muted); font-size: 12px; cursor: pointer; }
 .file-entry-dir { cursor: pointer; }
 .file-entry-dir:hover { background: rgba(255,255,255,0.04); }
 .file-entry-icon { font-size: 12px; flex-shrink: 0; }
+.history-divider { display: flex; align-items: center; gap: 8px; margin: 10px 0 6px; color: var(--muted); font-size: 11px; }
+.history-divider::before, .history-divider::after { content: ''; flex: 1; height: 1px; background: var(--border); }

web/src/components/MessagePane.tsx

@@ -2,10 +2,11 @@ import { useEffect, useRef, useState } from 'react'
 import { useWaste } from '../store'
 
 export function MessagePane() {
-  const { messages, activeRoom, activeNetworkId, localPeer, connectedPeers, send } = useWaste()
+  const { messages, historyCutoff, activeRoom, activeNetworkId, localPeer, connectedPeers, send } = useWaste()
   const [draft, setDraft] = useState('')
   const bottomRef = useRef<HTMLDivElement>(null)
   const roomMessages = messages[activeRoom] ?? []
+  const cutoff = historyCutoff[activeRoom] ?? 0
 
   useEffect(() => {
     bottomRef.current?.scrollIntoView({ behavior: 'smooth' })
@@ -46,12 +47,20 @@ export function MessagePane() {
           const mine = msg.from === localPeer?.id
           const alias = aliasFor(msg.from)
           const time = new Date(msg.ts).toLocaleTimeString([], { hour: '2-digit', minute: '2-digit', hour12: false })
+          const showDivider = cutoff > 0 && i > 0 && roomMessages[i - 1].ts <= cutoff && msg.ts > cutoff
           return (
-            <div key={msg.mid ?? i} className={`message ${mine ? 'mine' : ''}`}>
+            <div key={msg.mid ?? i}>
+              {showDivider && (
+                <div className="history-divider">
+                  <span>earlier messages</span>
+                </div>
+              )}
+              <div className={`message ${mine ? 'mine' : ''}`}>
                 <span className="message-ts">{time}</span>
                 <span className="message-alias">{alias}</span>
                 <span className="message-text">{msg.text}</span>
               </div>
+            </div>
           )
         })}
         <div ref={bottomRef} />

web/src/components/Transfers.tsx

@@ -7,12 +7,13 @@ function fmt(bytes: number): string {
 }
 
 export function Transfers() {
-  const { pendingOffers, fileProgress, acceptOffer, rejectOffer, cancelTransfer, connectedPeers } = useWaste()
+  const { pendingOffers, fileProgress, resumableFiles, acceptOffer, rejectOffer, cancelTransfer, connectedPeers } = useWaste()
 
   const hasPending = Object.keys(pendingOffers).length > 0
   const hasActive = Object.keys(fileProgress).length > 0
+  const hasResumable = Object.keys(resumableFiles).length > 0
 
-  if (!hasPending && !hasActive) return null
+  if (!hasPending && !hasActive && !hasResumable) return null
 
   function alias(peerId: string) {
     return connectedPeers.find(p => p.id === peerId)?.alias ?? peerId.slice(0, 8)
@@ -22,6 +23,24 @@ export function Transfers() {
     <div className="sidebar-section">
       <span className="sidebar-label">Transfers</span>
 
+      {hasResumable && (
+        <>
+          <span className="sidebar-label" style={{ fontSize: 10, opacity: 0.6 }}>resumable</span>
+          {Object.entries(resumableFiles).map(([sha256, f]) => {
+            const pct = f.size > 0 ? Math.round((f.offset / f.size) * 100) : 0
+            return (
+              <div key={sha256} className="transfer-row">
+                <span className="transfer-name" title={f.name}>{f.name}</span>
+                <span className="transfer-meta">{fmt(f.offset)} / {fmt(f.size)} · {alias(f.from)} · will resume on reconnect</span>
+                <div className="transfer-progress">
+                  <div className="transfer-progress-bar" style={{ width: `${pct}%`, opacity: 0.5 }} />
+                </div>
+              </div>
+            )
+          })}
+        </>
+      )}
+
       {Object.entries(pendingOffers).map(([xid, offer]) => (
         <div key={xid} className="transfer-row">
           <span className="transfer-name" title={offer.name}>{offer.name}</span>

web/src/store/index.ts

@@ -32,6 +32,8 @@ interface WasteState {
 
   // chat — keyed by room
   messages: Record<string, ChatMessage[]>
+  // rooms for which we have received history: room → ts of last history message
+  historyCutoff: Record<string, number>
   activeRoom: string
   // user-created rooms, keyed by networkId
   customRooms: Record<string, string[]>
@@ -53,6 +55,8 @@ interface WasteState {
   pendingOffers: Record<string, { peerId: string; name: string; size: number }>
   // active in-progress transfers: xid → progress
   fileProgress: Record<string, { peerId: string; name: string; received: number; total: number }>
+  // partial downloads found on daemon startup: sha256 → info
+  resumableFiles: Record<string, { name: string; from: string; size: number; offset: number }>
 
   // actions
   connect: (url: string) => void
@@ -84,6 +88,7 @@ export const useWaste = create<WasteState>((set, get) => ({
   activeNetworkId: null,
   connectedPeers: [],
   messages: {},
+  historyCutoff: {},
   activeRoom: 'general',
   customRooms: {},
   fileLists: {},
@@ -93,6 +98,7 @@ export const useWaste = create<WasteState>((set, get) => ({
   sharedFilesByNetwork: {},
   pendingOffers: {},
   fileProgress: {},
+  resumableFiles: {},
 
   connect(url: string) {
     const adapter = new DaemonAdapter(url)
@@ -341,10 +347,13 @@ export const useWaste = create<WasteState>((set, get) => ({
         break
       }
       case 'file_complete': {
-        if (msg.path && msg.offer?.name) {
+        // Always clear progress — transfer_id is the xid in daemon mode; offer.xid in browser mode.
-          // clear progress entry
+        const xid = msg.transfer_id ?? msg.offer?.xid
-          const xid = msg.offer.xid
+        if (xid) {
           set(s => { const fp = { ...s.fileProgress }; delete fp[xid]; return { fileProgress: fp } })
+        }
+        // Browser mode: trigger download via anchor click.
+        if (msg.path && msg.offer?.name) {
           const a = document.createElement('a')
           a.href = msg.path
           a.download = msg.offer.name
@@ -352,6 +361,32 @@ export const useWaste = create<WasteState>((set, get) => ({
         }
         break
       }
+      case 'resumable_transfers': {
+        const files = (msg.resumable_files ?? []) as Array<{ name: string; sha256: string; from: string; size: number; offset: number }>
+        if (files.length === 0) break
+        const byHash: Record<string, { name: string; from: string; size: number; offset: number }> = {}
+        for (const f of files) byHash[f.sha256] = { name: f.name, from: f.from, size: f.size, offset: f.offset }
+        set(s => ({ resumableFiles: { ...s.resumableFiles, ...byHash } }))
+        break
+      }
+      case 'history_loaded': {
+        const room = msg.room
+        const incoming = (msg.messages ?? []) as ChatMessage[]
+        if (!room || incoming.length === 0) break
+        set(s => {
+          const existing = s.messages[room] ?? []
+          const existingMids = new Set(existing.map(m => m.mid).filter(Boolean))
+          const fresh = incoming.filter(m => !m.mid || !existingMids.has(m.mid))
+          if (fresh.length === 0) return s
+          const merged = [...fresh, ...existing].sort((a, b) => a.ts - b.ts)
+          const cutoff = fresh[fresh.length - 1]?.ts ?? 0
+          return {
+            messages: { ...s.messages, [room]: merged },
+            historyCutoff: { ...s.historyCutoff, [room]: cutoff },
+          }
+        })
+        break
+      }
     }
   },
 }))

web/src/types.ts

@@ -82,6 +82,10 @@ export type IpcMsgType =
   | 'shares_list'
   | 'peer_status'
   | 'error'
+  | 'history_loaded'
+  | 'room_created'
+  | 'create_room'
+  | 'resumable_transfers'
 
 export interface IpcMessage {
   type: IpcMsgType
@@ -124,4 +128,8 @@ export interface IpcMessage {
   conn_state?: PeerConnState
   candidate_type?: CandidateType
   remote_address?: string
+  // history_loaded
+  messages?: ChatMessage[]
+  // resumable_transfers
+  resumable_files?: Array<{ name: string; sha256: string; from: string; size: number; offset: number }>
 }