feat: Persist locked state for flows (#4459)

* persist locked state for flows

* [autofix.ci] apply automated fixes

* [autofix.ci] apply automated fixes (attempt 2/3)

* 📝 (popover.tsx): Remove duplicate declaration of PopoverAnchor in popover.tsx
✨ (lock-flow.spec.ts): Add test for locking and unlocking a flow in the application to ensure proper functionality and saving of the flow.

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: cristhianzl <cristhian.lousa@gmail.com>

src/backend/base/langflow/alembic/versions/e3162c1804e6_add_persistent_locked_state.py

@@ -0,0 +1,35 @@
+"""add persistent locked state
+
+Revision ID: e3162c1804e6
+Revises: 1eab2c3eb45e
+Create Date: 2024-11-07 14:50:35.201760
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel
+from sqlalchemy.engine.reflection import Inspector
+from langflow.utils import migration
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'e3162c1804e6'
+down_revision: Union[str, None] = '1eab2c3eb45e'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    conn = op.get_bind()
+    with op.batch_alter_table('flow', schema=None) as batch_op:
+        if not migration.column_exists(table_name='flow', column_name='locked', conn=conn):
+            batch_op.add_column(sa.Column('locked', sa.Boolean(), nullable=True))
+
+
+def downgrade() -> None:
+    conn = op.get_bind()
+    with op.batch_alter_table('flow', schema=None) as batch_op:
+        if migration.column_exists(table_name='flow', column_name='locked', conn=conn):
+            batch_op.drop_column('locked')

src/backend/base/langflow/services/database/models/flow/model.py

@@ -37,6 +37,7 @@ class FlowBase(SQLModel):
     webhook: bool | None = Field(default=False, nullable=True, description="Can be used on the webhook endpoint")
     endpoint_name: str | None = Field(default=None, nullable=True, index=True)
     tags: list[str] | None = None
+    locked: bool | None = Field(default=False, nullable=True)
 
     @field_validator("endpoint_name")
     @classmethod
@@ -161,6 +162,7 @@ class Flow(FlowBase, table=True):  # type: ignore[call-arg]
     user: "User" = Relationship(back_populates="flows")
     icon: str | None = Field(default=None, nullable=True)
     tags: list[str] | None = Field(sa_column=Column(JSON), default=[])
+    locked: bool | None = Field(default=False, nullable=True)
     folder_id: UUID | None = Field(default=None, foreign_key="folder.id", nullable=True, index=True)
     folder: Optional["Folder"] = Relationship(back_populates="flows")
     messages: list["MessageTable"] = Relationship(back_populates="flow")
@@ -228,6 +230,7 @@ class FlowUpdate(SQLModel):
     data: dict | None = None
     folder_id: UUID | None = None
     endpoint_name: str | None = None
+    locked: bool | None = None
 
     @field_validator("endpoint_name")
     @classmethod