fix: resolve 17 P2 defects and 5 P3 defects from pre-launch audit

Batch fix covering multiple modules:
- P2-01: HandRegistry Semaphore-based max_concurrent enforcement
- P2-03: Populate toolCount/metricCount from Hand trait methods
- P2-06: heartbeat_update_config minimum interval validation
- P2-07: ReflectionResult used_fallback marker for rule-based fallback
- P2-08/09: identity_propose_change parameter naming consistency
- P2-10: ClassroomMetadata is_placeholder flag for LLM failure
- P2-11: classroomStore userDidCloseDuringGeneration intent tracking
- P2-12: workflowStore pipeline_create sends actionType
- P2-13/14: PipelineInfo step_count + PipelineStepInfo for proper step mapping
- P2-15: Pipe transform support in context.resolve (8 transforms)
- P2-16: Mustache {{...}} → \${...} auto-normalization
- P2-17: SaaSLogin password placeholder 6→8
- P2-19: serialize_skill_md + update_skill preserve tools field
- P2-22: ToolOutputGuard sensitive patterns from warn→block
- P2-23: Mutex::unwrap() → unwrap_or_else in relay/service.rs
- P3-01/03/07/08/09: Various P3 fixes
- DEFECT_LIST.md: comprehensive status sync (43/51 fixed, 8 remaining)

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

desktop/src/store/classroomStore.ts

@@ -59,6 +59,8 @@ export interface ClassroomState {
   activeClassroom: Classroom | null;
   /** Whether the ClassroomPlayer overlay is open */
   classroomOpen: boolean;
+  /** P2-11: Tracks if user explicitly closed player during generation */
+  userDidCloseDuringGeneration: boolean;
   /** Chat messages for the active classroom */
   chatMessages: ClassroomChatMessage[];
   /** Whether chat is loading */
@@ -93,6 +95,7 @@ export const useClassroomStore = create<ClassroomStore>()((set, get) => ({
   generatingTopic: null,
   activeClassroom: null,
   classroomOpen: false,
+  userDidCloseDuringGeneration: false,
   chatMessages: [],
   chatLoading: false,
   error: null,
@@ -105,6 +108,7 @@ export const useClassroomStore = create<ClassroomStore>()((set, get) => ({
       progressActivity: 'Starting generation...',
       generatingTopic: request.topic,
       error: null,
+      userDidCloseDuringGeneration: false,
     });
 
     // Listen for progress events from Rust
@@ -121,7 +125,10 @@ export const useClassroomStore = create<ClassroomStore>()((set, get) => ({
       const result = await invoke<GenerationResult>('classroom_generate', { request });
       set({ generating: false });
       await get().loadClassroom(result.classroomId);
-      set({ classroomOpen: true });
+      // P2-11: Only auto-open if user hasn't explicitly closed during generation
+      if (!get().userDidCloseDuringGeneration) {
+        set({ classroomOpen: true });
+      }
       return result.classroomId;
     } catch (e) {
       const msg = e instanceof Error ? e.message : String(e);
@@ -161,7 +168,11 @@ export const useClassroomStore = create<ClassroomStore>()((set, get) => ({
   },
 
   closeClassroom: () => {
-    set({ classroomOpen: false });
+    set({
+      classroomOpen: false,
+      // P2-11: Track explicit user close during generation
+      userDidCloseDuringGeneration: get().generating,
+    });
   },
 
   sendChatMessage: async (message, sceneContext) => {

desktop/src/store/workflowStore.ts

@@ -47,6 +47,8 @@ export interface WorkflowStep {
   name?: string;
   params?: Record<string, unknown>;
   condition?: string;
+  /** P2-12: Action type for pipeline step (hand, llm_generate, parallel, condition) */
+  actionType?: string;
 }
 
 export interface WorkflowDetail {
@@ -341,6 +343,8 @@ interface PipelineInfo {
   icon: string;
   version: string;
   author: string;
+  /** P2-13: Step count from backend */
+  stepCount?: number;
   inputs: Array<{
     name: string;
     inputType: string;
@@ -386,7 +390,7 @@ function createWorkflowClientFromKernel(_client: KernelClient): WorkflowClient {
           workflows: pipelines.map((p) => ({
             id: p.id,
             name: p.displayName || p.id,
-            steps: p.inputs.length,
+            steps: p.stepCount ?? p.inputs?.length ?? 0, // P2-13: Use stepCount from backend
             description: p.description,
             createdAt: undefined,
           })),
@@ -424,6 +428,7 @@ function createWorkflowClientFromKernel(_client: KernelClient): WorkflowClient {
               name: s.name || `Step ${i + 1}`,
               params: s.params,
               condition: s.condition,
+              actionType: s.actionType, // P2-12: Send actionType to backend
             })),
           },
         });
@@ -444,6 +449,7 @@ function createWorkflowClientFromKernel(_client: KernelClient): WorkflowClient {
               name: s.name || `Step ${i + 1}`,
               params: s.params,
               condition: s.condition,
+              actionType: s.actionType, // P2-12: Send actionType to backend
             })),
           },
         });