feat(canvas): 云端 Agent - 完成策略分层、节点能力注册与可解释审批改造

backend/internal/app/cloud_agent_nodes.go

@@ -1,63 +1,49 @@
 package app
 
-// cloudAgentNodeCapability is the server-side contract for nodes that an Agent
-// may create or connect. It is intentionally independent from the browser node
-// registry: renderers and plugin schemas are not an authorization boundary.
-type cloudAgentNodeCapability struct {
-	Type               string
-	Label              string
-	DefaultWidth       float64
-	DefaultHeight      float64
-	InputKind          string
-	GenerationMode     string
-	AcceptedInputKinds []string
-	MaxInputCount      int
-	CanUpdate          bool
+import "infinite-canvas/backend/internal/canvas/capability"
+
+// Canvas capabilities are registered once at the canvas domain boundary. Agent
+// tools, creation, media and state projection all consume this registry; there
+// is no Agent-only node allow-list to keep in sync.
+type cloudAgentNodeCapability = capability.Descriptor
+
+type CloudAgentCapabilitySet struct {
+	Version string
+	Hash    string
+	Nodes   []string
 }
 
-var cloudAgentNodeCapabilities = []cloudAgentNodeCapability{
-	{Type: "text", Label: "文本", DefaultWidth: 340, DefaultHeight: 240, InputKind: "text", CanUpdate: true},
-	{Type: "markdown", Label: "Markdown", DefaultWidth: 420, DefaultHeight: 320, InputKind: "text", CanUpdate: true},
-	{Type: "image", Label: "图片", DefaultWidth: 720, DefaultHeight: 405, InputKind: "image", GenerationMode: "image", AcceptedInputKinds: []string{"text", "image"}},
-	{Type: "video", Label: "视频", DefaultWidth: 720, DefaultHeight: 405, InputKind: "video", GenerationMode: "video", AcceptedInputKinds: []string{"text", "image", "video", "audio"}},
-	// The current audio provider has no character-image/voice binding input. Do
-	// not advertise image references until the provider path consumes them.
-	{Type: "audio", Label: "音频", DefaultWidth: 340, DefaultHeight: 120, InputKind: "audio", GenerationMode: "audio", AcceptedInputKinds: []string{"text"}, MaxInputCount: 1},
-	{Type: "frame", Label: "背板", DefaultWidth: 760, DefaultHeight: 520},
-	{Type: "script", Label: "分镜脚本", DefaultWidth: 920, DefaultHeight: 360},
-}
+const cloudAgentCapabilitySetVersion = capability.SetVersion
+
+var canvasCapabilityRegistry = capability.BuiltinRegistry()
 
 func cloudAgentNodeCapabilityForType(nodeType string) (cloudAgentNodeCapability, bool) {
-	for _, capability := range cloudAgentNodeCapabilities {
-		if capability.Type == nodeType {
-			return capability, true
-		}
-	}
-	return cloudAgentNodeCapability{}, false
+	return canvasCapabilityRegistry.Resolve(nodeType)
 }
 
-func cloudAgentNodeTypeNames() []string {
-	names := make([]string, 0, len(cloudAgentNodeCapabilities))
-	for _, capability := range cloudAgentNodeCapabilities {
-		names = append(names, capability.Type)
-	}
-	return names
-}
+func cloudAgentNodeTypeNames() []string { return canvasCapabilityRegistry.Types() }
 
-// cloudAgentGenerationModes is the single source of truth for generation
-// capabilities exposed to Agent. Keep this derived from the node contract so a
-// newly supported generation node cannot be accidentally omitted from model
-// discovery while still being accepted by the write path.
-func cloudAgentGenerationModes() map[string]bool {
-	modes := make(map[string]bool)
-	for _, capability := range cloudAgentNodeCapabilities {
-		if capability.GenerationMode != "" {
-			modes[capability.GenerationMode] = true
+func cloudAgentGenerationModeNames() []string {
+	modes := make([]string, 0)
+	for _, mode := range canvasCapabilityRegistry.GenerationModeNames() {
+		if cloudAgentGenerationModeSupported(mode) {
+			modes = append(modes, mode)
 		}
 	}
 	return modes
 }
 
 func cloudAgentGenerationModeSupported(mode string) bool {
-	return cloudAgentGenerationModes()[mode]
+	_, implemented := cloudAgentGenerationAdapters[mode]
+	return implemented && canvasCapabilityRegistry.SupportsGenerationMode(mode)
+}
+
+func cloudAgentNodeCapabilityForGenerationMode(mode string) (cloudAgentNodeCapability, bool) {
+	return canvasCapabilityRegistry.ResolveGenerationMode(mode)
+}
+
+func cloudAgentCapabilitySetHash() string { return canvasCapabilityRegistry.Hash() }
+
+func CloudAgentCapabilitySetInfo() CloudAgentCapabilitySet {
+	return CloudAgentCapabilitySet{Version: cloudAgentCapabilitySetVersion, Hash: cloudAgentCapabilitySetHash(), Nodes: cloudAgentNodeTypeNames()}
 }