feat(webui): add project workspaces and access controls (#4007)

* feat(webui): add project workspaces and access controls

* feat(webui): add project workspaces and access controls

* refactor(tools): centralize workspace access resolution

* refactor(webui): remove unused workspace host state

* fix(webui): hide estimated file edit label

* fix(webui): clarify file edit deletion feedback

* fix(webui): label deleted file activity

* fix(webui): flatten file edit activity rows

* fix(core): remove path-only patch deletion

* fix(core): keep apply patch non-destructive

* refactor(webui): trim workspace host plumbing

* fix(tools): register exec with tools config

nanobot/utils/file_edit_events.py

@@ -299,6 +299,7 @@ def build_file_edit_end_event(
         deleted=deleted,
         approximate=False,
         binary=(after.binary or after.oversized or after.unreadable) and not counted,
+        operation="delete" if tracker.before.exists and not after.exists else None,
     )
 
 
@@ -324,6 +325,7 @@ def build_file_edit_live_event(
     *,
     added: int,
     deleted: int = 0,
+    operation: str | None = None,
 ) -> dict[str, Any]:
     """Build an approximate in-progress event while tool-call arguments stream."""
     return _event_payload(
@@ -333,6 +335,7 @@ def build_file_edit_live_event(
         added=added,
         deleted=deleted,
         approximate=True,
+        operation=operation,
     )
 
 
@@ -454,15 +457,14 @@ class StreamingFileEditTracker:
             segment_end = path_matches[i + 1].start() if i + 1 < len(path_matches) else len(state.arguments)
             segment = state.arguments[segment_start:segment_end]
 
-            action_match = re.search(r'"action"\s*:\s*"(replace|add|delete)"', segment)
+            action_match = re.search(r'"action"\s*:\s*"(replace|add)"', segment)
             action = action_match.group(1) if action_match else "replace"
 
             old_text = _extract_json_string_prefix(segment, "old_text") or ""
             new_text = _extract_json_string_prefix(segment, "new_text") or ""
 
             added = _text_line_count(new_text) if action in ("replace", "add") else 0
-            deleted = _text_line_count(old_text) if action in ("replace", "delete") else 0
-            delete_file = action == "delete"
+            deleted = _text_line_count(old_text) if action == "replace" else 0
 
             file_state = state.patch_files.get(raw_path)
             if file_state is None:
@@ -475,8 +477,6 @@ class StreamingFileEditTracker:
                 )
                 file_state = _StreamingPatchFileState(tracker=tracker)
                 state.patch_files[raw_path] = file_state
-            if delete_file and added == 0 and deleted == 0 and file_state.tracker.before.countable:
-                deleted = _text_line_count(file_state.tracker.before.text or "")
             if not file_state.should_emit(added, deleted, now):
                 continue
             file_state.mark_emitted(added, deleted, now)
@@ -916,6 +916,7 @@ def _event_payload(
     deleted: int,
     approximate: bool,
     binary: bool = False,
+    operation: str | None = None,
 ) -> dict[str, Any]:
     payload: dict[str, Any] = {
         "version": 1,
@@ -931,6 +932,8 @@ def _event_payload(
     }
     if binary:
         payload["binary"] = True
+    if operation:
+        payload["operation"] = operation
     return payload