feat(auth): add PAT auth, scoped REST/MCP access, CSRF, and tenant isolation

Introduce Personal Access Tokens (nzp_*) as a stateless auth path alongside
JWT, gated per-endpoint by a scope middleware (nezha:{resource}:{verb}) with
fail-closed empty-scope defaults and a server-id whitelist. Self-management
endpoints (profile, api-tokens, oauth2 bind, refresh-token) explicitly reject
PATs to block privilege-escalation chains. A revoke registry tears down active
long-lived connections (terminal, fm, ws, transfer, mcp) the moment a PAT is
deleted, with a tombstone closing the revoke->register race.

Add an MCP endpoint that proxies tool calls (exec, fs read/write/delete,
transfer) to agents over gRPC, guarded by origin/DNS-rebinding checks, a
per-token rate limiter, audit logging, and a kill switch. Serialize all
sends through the IOStream wrapper to honour grpc-go's concurrency contract.

Add CSRF double-submit protection on unsafe cookie-authenticated methods,
exempting authenticated PAT requests by context identity (not a forgeable
Authorization header). Apply visibility/whitelist filtering consistently
across list, get-by-id, and mutate paths to enforce tenant isolation.

Migrate legacy mcp:* scopes: rewrite read/exec to nezha:* equivalents and
drop dangerous write/delete/wildcard grants.

Co-authored-by: cloudcode <cloudcode@users.noreply.github.com>

cmd/dashboard/controller/api_token_revoke_registry_test.go

@@ -0,0 +1,99 @@
+package controller
+
+import (
+	"context"
+	"testing"
+	"time"
+)
+
+// M7 regression: long-lived PAT-authenticated handlers (ws/server,
+// ws/transfer, terminal, FM) must register a cancel hook so that
+// deleteAPIToken can close active connections immediately. Without this,
+// a revoked PAT keeps streaming until the connection naturally drops.
+func TestPATConnectionRegistry_CancelsOnRevoke(t *testing.T) {
+	registry := newPATConnectionRegistry()
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	deregister := registry.register(42, cancel)
+	defer deregister()
+
+	registry.revokeToken(42)
+
+	select {
+	case <-ctx.Done():
+	case <-time.After(time.Second):
+		t.Fatal("revokeToken must cancel the registered context within 1s")
+	}
+}
+
+func TestPATConnectionRegistry_DoesNotCancelOtherTokens(t *testing.T) {
+	registry := newPATConnectionRegistry()
+	ctxA, cancelA := context.WithCancel(context.Background())
+	ctxB, cancelB := context.WithCancel(context.Background())
+	defer cancelA()
+	defer cancelB()
+
+	deregisterA := registry.register(1, cancelA)
+	deregisterB := registry.register(2, cancelB)
+	defer deregisterA()
+	defer deregisterB()
+
+	registry.revokeToken(1)
+
+	select {
+	case <-ctxA.Done():
+	case <-time.After(time.Second):
+		t.Fatal("token 1's connection must be cancelled")
+	}
+
+	select {
+	case <-ctxB.Done():
+		t.Fatal("token 2's connection must NOT be cancelled (separate token)")
+	case <-time.After(50 * time.Millisecond):
+	}
+}
+
+func TestPATConnectionRegistry_DeregisterClearsEntry(t *testing.T) {
+	registry := newPATConnectionRegistry()
+	_, cancel := context.WithCancel(context.Background())
+	deregister := registry.register(1, cancel)
+
+	deregister()
+
+	if got := registry.countForToken(1); got != 0 {
+		t.Fatalf("after deregister, count for token 1 must be 0, got %d", got)
+	}
+}
+
+func TestPATConnectionRegistry_MultipleConnsPerToken(t *testing.T) {
+	registry := newPATConnectionRegistry()
+	ctx1, c1 := context.WithCancel(context.Background())
+	ctx2, c2 := context.WithCancel(context.Background())
+	defer c1()
+	defer c2()
+
+	d1 := registry.register(7, c1)
+	d2 := registry.register(7, c2)
+	defer d1()
+	defer d2()
+
+	if got := registry.countForToken(7); got != 2 {
+		t.Fatalf("expected 2 connections for token 7, got %d", got)
+	}
+
+	registry.revokeToken(7)
+
+	for _, ctx := range []context.Context{ctx1, ctx2} {
+		select {
+		case <-ctx.Done():
+		case <-time.After(time.Second):
+			t.Fatal("all connections for the revoked token must be cancelled")
+		}
+	}
+}
+
+func TestPATConnectionRegistry_RevokeUnknownTokenIsNoOp(t *testing.T) {
+	registry := newPATConnectionRegistry()
+	registry.revokeToken(999) // must not panic
+}