Merge remote-tracking branch 'origin/master' into dev/4.11.x

# Conflicts:
#	pyproject.toml
#	src/langbot/pkg/pipeline/controller.py
#	uv.lock
#	web/src/app/home/bots/components/bot-form/BotForm.tsx
#	web/src/app/home/components/home-sidebar/HomeSidebar.tsx
#	web/src/app/home/components/home-sidebar/SidebarDataContext.tsx
#	web/src/app/home/plugin-pages/page.tsx
#	web/src/app/infra/entities/api/index.ts

src/langbot/pkg/persistence/alembic/versions/0016_space_launch_replay.py

@@ -0,0 +1,57 @@
+"""add durable replay protection for signed Space launch assertions
+
+Revision ID: 0016_space_launch_replay
+Revises: 0015_cloud_core_collab
+Create Date: 2026-07-31
+"""
+
+from __future__ import annotations
+
+import sqlalchemy as sa
+from alembic import op
+
+revision = '0016_space_launch_replay'
+down_revision = '0015_cloud_core_collab'
+branch_labels = None
+depends_on = None
+
+_TABLE = 'space_launch_assertion_consumptions'
+_POLICY = 'langbot_directory_projection'
+_SETTING = "NULLIF(current_setting('langbot.directory_instance_uuid', true), '')"
+
+
+def upgrade() -> None:
+    conn = op.get_bind()
+    if _TABLE not in set(sa.inspect(conn).get_table_names()):
+        op.create_table(
+            _TABLE,
+            sa.Column('instance_uuid', sa.String(255), nullable=False),
+            sa.Column('jti', sa.String(255), nullable=False),
+            sa.Column('expires_at', sa.DateTime(timezone=True), nullable=False),
+            sa.Column('consumed_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+            sa.PrimaryKeyConstraint('instance_uuid', 'jti'),
+        )
+        op.create_index(
+            'ix_space_launch_assertion_consumptions_expiry',
+            _TABLE,
+            ['instance_uuid', 'expires_at'],
+            unique=False,
+        )
+    if conn.dialect.name == 'postgresql':
+        table = conn.dialect.identifier_preparer.quote(_TABLE)
+        policy = conn.dialect.identifier_preparer.quote(_POLICY)
+        expression = f'instance_uuid::text = {_SETTING}'
+        op.execute(sa.text(f'ALTER TABLE {table} ENABLE ROW LEVEL SECURITY'))
+        op.execute(sa.text(f'ALTER TABLE {table} FORCE ROW LEVEL SECURITY'))
+        op.execute(sa.text(f'DROP POLICY IF EXISTS {policy} ON {table}'))
+        op.execute(
+            sa.text(
+                f'CREATE POLICY {policy} ON {table} AS PERMISSIVE FOR ALL TO PUBLIC '
+                f'USING ({expression}) WITH CHECK ({expression})'
+            )
+        )
+
+
+def downgrade() -> None:
+    if _TABLE in set(sa.inspect(op.get_bind()).get_table_names()):
+        op.drop_table(_TABLE)

src/langbot/pkg/persistence/alembic/versions/0018_merge_launch_replay.py

@@ -0,0 +1,21 @@
+"""merge the published Space launch replay and main migration branches
+
+Revision ID: 0018_merge_launch_replay
+Revises: 0016_space_launch_replay, 0017_oss_workspace_identity
+Create Date: 2026-08-01
+"""
+
+from __future__ import annotations
+
+revision = '0018_merge_launch_replay'
+down_revision = ('0016_space_launch_replay', '0017_oss_workspace_identity')
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    pass
+
+
+def downgrade() -> None:
+    pass

src/langbot/pkg/persistence/alembic/versions/0019_single_workspace_owner.py

@@ -0,0 +1,80 @@
+"""enforce one active owner per Workspace
+
+Revision ID: 0019_single_workspace_owner
+Revises: 0018_merge_launch_replay
+Create Date: 2026-08-02
+"""
+
+from __future__ import annotations
+
+import sqlalchemy as sa
+from alembic import op
+
+revision = '0019_single_workspace_owner'
+down_revision = '0018_merge_launch_replay'
+branch_labels = None
+depends_on = None
+
+_INDEX_NAME = 'uq_workspace_memberships_one_active_owner'
+
+
+def upgrade() -> None:
+    conn = op.get_bind()
+    inspector = sa.inspect(conn)
+    if 'workspace_memberships' not in inspector.get_table_names():
+        return
+
+    # Ownership transfer used to promote a second member without demoting the
+    # original owner. Preserve the Workspace creator where possible and demote
+    # every historical extra owner before installing the database invariant.
+    op.execute(
+        sa.text(
+            """
+            WITH ranked_owners AS (
+                SELECT membership.uuid,
+                       ROW_NUMBER() OVER (
+                           PARTITION BY membership.workspace_uuid
+                           ORDER BY
+                               CASE
+                                   WHEN membership.account_uuid = workspace.created_by_account_uuid THEN 0
+                                   ELSE 1
+                               END,
+                               COALESCE(membership.joined_at, membership.created_at),
+                               membership.uuid
+                       ) AS owner_rank
+                FROM workspace_memberships AS membership
+                JOIN workspaces AS workspace
+                  ON workspace.uuid = membership.workspace_uuid
+                WHERE membership.role = 'owner'
+                  AND membership.status = 'active'
+            )
+            UPDATE workspace_memberships
+               SET role = 'admin'
+             WHERE uuid IN (
+                 SELECT uuid
+                   FROM ranked_owners
+                  WHERE owner_rank > 1
+             )
+            """
+        )
+    )
+    # Fresh installations may already have this index because SQLAlchemy
+    # metadata is created before Alembic advances the revision marker.
+    op.execute(
+        sa.text(
+            'CREATE UNIQUE INDEX IF NOT EXISTS '
+            'uq_workspace_memberships_one_active_owner '
+            'ON workspace_memberships (workspace_uuid) '
+            "WHERE role = 'owner' AND status = 'active'"
+        )
+    )
+
+
+def downgrade() -> None:
+    conn = op.get_bind()
+    inspector = sa.inspect(conn)
+    if 'workspace_memberships' not in inspector.get_table_names():
+        return
+    index_names = {index['name'] for index in inspector.get_indexes('workspace_memberships')}
+    if _INDEX_NAME in index_names:
+        op.drop_index(_INDEX_NAME, table_name='workspace_memberships')

src/langbot/pkg/persistence/alembic/versions/0020_merge_agent_cloud_heads.py

@@ -0,0 +1,21 @@
+"""merge AgentRunner and Cloud Workspace migration heads
+
+Revision ID: 0020_merge_agent_cloud_heads
+Revises: 0018_merge_workspace_heads, 0019_single_workspace_owner
+Create Date: 2026-08-04
+"""
+
+from __future__ import annotations
+
+revision = '0020_merge_agent_cloud_heads'
+down_revision = ('0018_merge_workspace_heads', '0019_single_workspace_owner')
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    pass
+
+
+def downgrade() -> None:
+    pass

src/langbot/pkg/persistence/tenant_uow.py

@@ -210,7 +210,7 @@ _ALLOWED_SCOPED_BUILTIN_FUNCTION_TYPES = {
     'now': sqlalchemy.sql.functions.now,
     'sum': sqlalchemy.sql.functions.sum,
 }
-_ALLOWED_SCOPED_GENERIC_FUNCTIONS = frozenset({'length', 'nullif'})
+_ALLOWED_SCOPED_GENERIC_FUNCTIONS = frozenset({'date_trunc', 'length', 'nullif'})
 _ALLOWED_SCOPED_CUSTOM_OPERATORS = frozenset({'<=>'})
 _ALLOWED_SCOPED_STATEMENT_TYPES = (
     sqlalchemy.sql.dml.UpdateBase,