feat(automations): added UI and improved mentions

- Added support for @-mentions in agent tasks, allowing users to reference documents, folders, and connectors directly in their queries.
- Updated `run_agent_task` to resolve mentions and include them in the context passed to the agent.
- Introduced new parameters in `AgentTaskActionParams` for handling mentioned document and connector IDs.
- Refactored the automation edit and new components to utilize the new `AutomationBuilderForm` for a more streamlined user experience.
- Removed deprecated JSON forms to simplify the automation creation process.

surfsense_backend/app/automations/actions/agent_task/params.py

@@ -4,6 +4,8 @@ from __future__ import annotations
 
 from pydantic import BaseModel, ConfigDict, Field
 
+from app.schemas.new_chat import MentionedDocumentInfo
+
 
 class AgentTaskActionParams(BaseModel):
     """Run a multi_agent_chat turn from an automation step."""
@@ -19,3 +21,32 @@ class AgentTaskActionParams(BaseModel):
         default=False,
         description="If true, every HITL approval is auto-approved; otherwise rejected.",
     )
+
+    # @-mention references chosen in the task input. Mirror the ``new_chat``
+    # request fields (minus SurfSense product docs) so the run can scope
+    # retrieval to the user's selected files / folders / connectors. All
+    # optional and additive; a task with no mentions behaves as before.
+    mentioned_document_ids: list[int] | None = Field(
+        default=None,
+        description="Knowledge-base document IDs the task references with @.",
+    )
+    mentioned_folder_ids: list[int] | None = Field(
+        default=None,
+        description="Knowledge-base folder IDs the task references with @.",
+    )
+    mentioned_connector_ids: list[int] | None = Field(
+        default=None,
+        description="Concrete connector account IDs the task references with @.",
+    )
+    mentioned_connectors: list[MentionedDocumentInfo] | None = Field(
+        default=None,
+        description="Display/context metadata for the @-mentioned connector accounts.",
+    )
+    mentioned_documents: list[MentionedDocumentInfo] | None = Field(
+        default=None,
+        description=(
+            "Chip metadata (id, title, kind, ...) for every @-mention so the "
+            "run can resolve titles to virtual paths and substitute them in "
+            "the query."
+        ),
+    )