Plan-based caching with artifact playback in UI

RunStatus now stores:
- plan_id, plan_name for linking to execution plan
- step_results for per-step execution status
- all_outputs for all artifacts from all steps

Plan visualization:
- Shows human-readable step names from recipe structure
- Video/audio artifact preview on node click
- Outputs list with links to cached artifacts
- Stats reflect actual execution status (completed/cached/pending)

Execution:
- Step results include outputs list with cache_ids
- run_plan returns all outputs from all steps
- Support for completed_by_other status

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tasks/orchestrate.py

@@ -168,15 +168,49 @@ def run_plan(
     output_cache_id = output_step.cache_id if output_step else None
     output_path = None
     output_ipfs_cid = None
+    output_name = plan.output_name
 
     if output_cache_id:
         output_path = cache_mgr.get_by_content_hash(output_cache_id)
         output_ipfs_cid = cache_mgr.get_ipfs_cid(output_cache_id)
 
+    # Build list of all outputs with their names and artifacts
+    all_outputs = []
+    for step in plan.steps:
+        step_result = results_by_step.get(step.step_id, {})
+        step_outputs = step_result.get("outputs", [])
+
+        # If no outputs in result, build from step definition
+        if not step_outputs and step.outputs:
+            for output_def in step.outputs:
+                output_cache_path = cache_mgr.get_by_content_hash(output_def.cache_id)
+                output_ipfs = cache_mgr.get_ipfs_cid(output_def.cache_id) if output_cache_path else None
+                all_outputs.append({
+                    "name": output_def.name,
+                    "step_id": step.step_id,
+                    "step_name": step.name,
+                    "cache_id": output_def.cache_id,
+                    "media_type": output_def.media_type,
+                    "path": str(output_cache_path) if output_cache_path else None,
+                    "ipfs_cid": output_ipfs,
+                    "status": "cached" if output_cache_path else "missing",
+                })
+        else:
+            for output in step_outputs:
+                all_outputs.append({
+                    **output,
+                    "step_id": step.step_id,
+                    "step_name": step.name,
+                    "status": "completed",
+                })
+
     return {
         "status": "completed",
         "run_id": run_id,
         "plan_id": plan.plan_id,
+        "plan_name": plan.name,
+        "recipe_name": plan.recipe_name,
+        "output_name": output_name,
         "output_cache_id": output_cache_id,
         "output_path": str(output_path) if output_path else None,
         "output_ipfs_cid": output_ipfs_cid,
@@ -184,6 +218,7 @@ def run_plan(
         "cached": total_cached,
         "executed": total_executed,
         "results": results_by_step,
+        "outputs": all_outputs,
     }