feat: initial shared library extraction

Contains shared infrastructure for all coop services:
- shared/ (factory, urls, user_loader, context, internal_api, jinja_setup)
- models/ (User, Order, Calendar, Ticket, Product, Ghost CMS)
- db/ (SQLAlchemy async session, base)
- suma_browser/app/ (csrf, middleware, errors, authz, redis_cacher, payments, filters, utils)
- suma_browser/templates/ (shared base layouts, macros, error pages)
- static/ (CSS, JS, fonts, images)
- alembic/ (database migrations)
- config/ (app-config.yaml)
- editor/ (Lexical editor Node.js build)
- requirements.txt

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

alembic/old_versions/215330c5ec15_add_calendars_and_entries.py

@@ -0,0 +1,92 @@
+"""add calendars & calendar_entries
+
+Revision ID: 215330c5ec15
+Revises: 20251102_223123
+Create Date: 2025-11-03 13:07:10.387189
+"""
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = "215330c5ec15"
+down_revision = "20251102_223123"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # calendars
+    op.create_table(
+        "calendars",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("post_id", sa.Integer(), sa.ForeignKey("posts.id", ondelete="CASCADE"), nullable=False),
+        sa.Column("name", sa.String(length=255), nullable=False),
+        sa.Column("slug", sa.String(length=255), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+        # no hard UniqueConstraint; we enforce soft-delete-aware uniqueness with a partial index below
+    )
+    # helpful lookup indexes
+    op.create_index("ix_calendars_post_id", "calendars", ["post_id"], unique=False)
+    op.create_index("ix_calendars_name", "calendars", ["name"], unique=False)
+    op.create_index("ix_calendars_slug", "calendars", ["slug"], unique=False)
+
+    # calendar_entries
+    op.create_table(
+        "calendar_entries",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("calendar_id", sa.Integer(), sa.ForeignKey("calendars.id", ondelete="CASCADE"), nullable=False),
+        sa.Column("name", sa.String(length=255), nullable=False),
+        sa.Column("start_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("end_at", sa.DateTime(timezone=True), nullable=True),  # <- allow open-ended
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+        sa.CheckConstraint("(end_at IS NULL) OR (end_at >= start_at)", name="ck_calendar_entries_end_after_start"),
+    )
+    op.create_index("ix_calendar_entries_calendar_id", "calendar_entries", ["calendar_id"], unique=False)
+    op.create_index("ix_calendar_entries_start_at", "calendar_entries", ["start_at"], unique=False)
+    op.create_index("ix_calendar_entries_name", "calendar_entries", ["name"], unique=False)
+
+    # ---- Soft-delete-aware uniqueness for calendars (Postgres) ----
+    # One active calendar per (post_id, lower(slug))
+    if op.get_bind().dialect.name == "postgresql":
+        # cleanup any active duplicates (defensive; table is new on fresh runs)
+        op.execute("""
+            WITH ranked AS (
+                SELECT
+                    id,
+                    ROW_NUMBER() OVER (
+                        PARTITION BY post_id, lower(slug)
+                        ORDER BY updated_at DESC, created_at DESC, id DESC
+                    ) AS rn
+                FROM calendars
+                WHERE deleted_at IS NULL
+            )
+            UPDATE calendars c
+            SET deleted_at = NOW()
+            FROM ranked r
+            WHERE c.id = r.id AND r.rn > 1;
+        """)
+        op.execute("""
+            CREATE UNIQUE INDEX IF NOT EXISTS ux_calendars_post_slug_active
+            ON calendars (post_id, lower(slug))
+            WHERE deleted_at IS NULL;
+        """)
+
+
+def downgrade():
+    # drop in reverse dependency order
+    op.drop_index("ix_calendar_entries_name", table_name="calendar_entries")
+    op.drop_index("ix_calendar_entries_start_at", table_name="calendar_entries")
+    op.drop_index("ix_calendar_entries_calendar_id", table_name="calendar_entries")
+    op.drop_table("calendar_entries")
+
+    if op.get_bind().dialect.name == "postgresql":
+        op.execute("DROP INDEX IF EXISTS ux_calendars_post_slug_active;")
+
+    op.drop_index("ix_calendars_slug", table_name="calendars")
+    op.drop_index("ix_calendars_name", table_name="calendars")
+    op.drop_index("ix_calendars_post_id", table_name="calendars")
+    op.drop_table("calendars")