feat: implement tabbed interface for room edit dialog

- Add General, Calendar, and Share tabs to organize room settings
- Move ICS settings to dedicated Calendar tab
- Move Zulip configuration to Share tab
- Keep basic room settings and webhooks in General tab
- Remove redundant migration file
- Fix Chakra UI v3 compatibility issues in calendar components

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

server/migrations/versions/a256772ef058_add_ics_uid_to_calendar_event.py

@@ -1,46 +0,0 @@
-"""add_ics_uid_to_calendar_event
-
-Revision ID: a256772ef058
-Revises: d4a1c446458c
-Create Date: 2025-08-19 09:27:26.472456
-
-"""
-
-from typing import Sequence, Union
-
-import sqlalchemy as sa
-from alembic import op
-
-# revision identifiers, used by Alembic.
-revision: str = "a256772ef058"
-down_revision: Union[str, None] = "d4a1c446458c"
-branch_labels: Union[str, Sequence[str], None] = None
-depends_on: Union[str, Sequence[str], None] = None
-
-
-def upgrade() -> None:
-    # ### commands auto generated by Alembic - please adjust! ###
-    with op.batch_alter_table("calendar_event", schema=None) as batch_op:
-        batch_op.add_column(sa.Column("ics_uid", sa.Text(), nullable=False))
-        batch_op.drop_constraint(batch_op.f("uq_room_calendar_event"), type_="unique")
-        batch_op.create_unique_constraint(
-            "uq_room_calendar_event", ["room_id", "ics_uid"]
-        )
-        batch_op.drop_column("external_id")
-
-    # ### end Alembic commands ###
-
-
-def downgrade() -> None:
-    # ### commands auto generated by Alembic - please adjust! ###
-    with op.batch_alter_table("calendar_event", schema=None) as batch_op:
-        batch_op.add_column(
-            sa.Column("external_id", sa.TEXT(), autoincrement=False, nullable=True)
-        )
-        batch_op.drop_constraint("uq_room_calendar_event", type_="unique")
-        batch_op.create_unique_constraint(
-            batch_op.f("uq_room_calendar_event"), ["room_id", "external_id"]
-        )
-        batch_op.drop_column("ics_uid")
-
-    # ### end Alembic commands ###