feat(M6): token-ring protocol complete — task ride+lowest-load claim, topology publish back to token, real worker spawn via claim, incremental log sync e2e

internal/cluster/ring_engine.go

@@ -6,6 +6,8 @@ import (
 	"context"
 	"log"
 	"time"
+
+	"webui4frpc/internal/store"
 )
 
 // Phase constants for the two-round cycle.
@@ -159,7 +161,10 @@ func (e *Engine) phase2(ctx context.Context, tk *Token) error {
 		}
 		e.state.AddTopology(claimed, e.ID)
 	}
-	e.state = tk.State
+	// Publish our updated state back into the token so the next node carries
+	// the fresh topology + pending set (do NOT revert local state to the
+	// incoming snapshot — that would discard the claim we just made).
+	tk.State = e.state
 	tk.Passed = append(tk.Passed, e.ID)
 	return nil
 }
@@ -359,6 +364,12 @@ func (e *Engine) AdoptState(s State) {
 	}
 }
 
+// SubmitTask adds a new forward request to pending; it rides the next token
+// round and is claimed by the lowest-load member.
+func (e *Engine) SubmitTask(local store.Local, remote store.Remote, link store.Link) *Task {
+	return e.state.AddPending(local, remote, link)
+}
+
 // IsLeader reports whether this node is the current ring leader.
 func (e *Engine) IsLeader() bool { return e.state.LeaderID == e.ID }