refactor(memory): rename workflow.target -> params, type -> name

The Workflow STM component stored an active workflow as
{type, target, stage, started_at}. Now that start_workflow takes a
workflow_name and a params dict, those keys match what they actually
hold:

  type   -> name    (the YAML workflow name, e.g. media.organize_media)
  target -> params  (the dict passed to start_workflow)

ShortTermMemory.start_workflow parameters renamed accordingly. All
consumers (prompt builder workflow scope + STM context, start/end
workflow tools) updated.

alfred/agent/prompt.py

@@ -39,7 +39,7 @@ class PromptBuilder:
         current = memory.stm.workflow.current
         if current is None:
             return None
-        return self.workflow_loader.get(current.get("type"))
+        return self.workflow_loader.get(current.get("name"))
 
     def visible_tool_names(self) -> list[str]:
         """
@@ -149,12 +149,12 @@ EXPRESSIONS À UTILISER (une par situation, naturellement intégrées dans ta r
 
         current = memory.stm.workflow.current or {}
         lines = [
-            f"WORKFLOW SCOPE: active — {current.get('type')} "
+            f"WORKFLOW SCOPE: active — {current.get('name')} "
             f"(stage: {current.get('stage')})",
         ]
-        target = current.get("target")
-        if target:
-            lines.append(f"  Params: {target}")
+        params = current.get("params")
+        if params:
+            lines.append(f"  Params: {params}")
         wf_desc = (workflow.get("description") or "").strip()
         if wf_desc:
             lines.append(f"  Goal: {wf_desc}")
@@ -220,10 +220,10 @@ EXPRESSIONS À UTILISER (une par situation, naturellement intégrées dans ta r
         if memory.stm.current_workflow:
             workflow = memory.stm.current_workflow
             lines.append(
-                f"CURRENT WORKFLOW: {workflow.get('type')} (stage: {workflow.get('stage')})"
+                f"CURRENT WORKFLOW: {workflow.get('name')} (stage: {workflow.get('stage')})"
             )
-            if workflow.get("target"):
-                lines.append(f"  Target: {workflow.get('target')}")
+            if workflow.get("params"):
+                lines.append(f"  Params: {workflow.get('params')}")
 
         if memory.stm.current_topic:
             lines.append(f"CURRENT TOPIC: {memory.stm.current_topic}")

alfred/agent/tools/workflow.py

@@ -44,10 +44,10 @@ def start_workflow(workflow_name: str, params: dict) -> dict[str, Any]:
             "status": "error",
             "error": "workflow_already_active",
             "message": (
-                f"Workflow '{current.get('type')}' is already active. "
+                f"Workflow '{current.get('name')}' is already active. "
                 "Call end_workflow before starting a new one."
             ),
-            "active_workflow": current.get("type"),
+            "active_workflow": current.get("name"),
         }
 
     memory.stm.start_workflow(workflow_name, params or {})
@@ -74,7 +74,7 @@ def end_workflow(reason: str) -> dict[str, Any]:
             "message": "No workflow is currently active.",
         }
 
-    workflow_name = current.get("type")
+    workflow_name = current.get("name")
     memory.stm.end_workflow()
     memory.save()
     logger.info(f"end_workflow: '{workflow_name}' reason={reason!r}")