feat: initialize events app with calendars, slots, tickets, and internal API

Extract events/calendar functionality into standalone microservice:
- app.py and events_api.py from apps/events/
- Calendar blueprints (calendars, calendar, calendar_entries, calendar_entry, day, slots, slot, ticket_types, ticket_type)
- Templates for all calendar/event views including admin
- Dockerfile (APP_MODULE=app:app, IMAGE=events)
- entrypoint.sh (no Alembic - migrations managed by blog app)
- Gitea CI workflow for build and deploy

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

bp/slot/routes.py

@@ -0,0 +1,182 @@
+from __future__ import annotations
+
+from quart import (
+    request, render_template, make_response, Blueprint, g, jsonify
+)
+from sqlalchemy.exc import IntegrityError
+
+
+from suma_browser.app.authz import require_admin
+from suma_browser.app.redis_cacher import clear_cache
+
+from .services.slot import (
+  update_slot as svc_update_slot,
+  soft_delete_slot as svc_delete_slot,
+  get_slot as svc_get_slot,
+)
+
+from ..slots.services.slots import (
+  list_slots as svc_list_slots,
+)
+
+from suma_browser.app.utils import (
+    parse_time,
+    parse_cost
+)
+from suma_browser.app.utils.htmx import is_htmx_request
+
+
+def register():
+    bp = Blueprint("slot", __name__, url_prefix='/<int:slot_id>')
+    
+    # ---------- Pages ----------
+
+    @bp.get("/")
+    @require_admin
+    async def get(slot_id: int, **kwargs):
+        slot = await svc_get_slot(g.s, slot_id)
+        if not slot:
+            return await make_response("Not found", 404)
+        
+        if not is_htmx_request():
+          # Normal browser request: full page with layout
+          html = await render_template(
+            "_types/slot/index.html",
+            slot=slot,
+            )
+        else:
+            
+            html = await render_template(
+              "_types/slot/_oob_elements.html",
+              slot=slot,
+            )
+        
+        return await make_response(html)
+
+
+    @bp.get("/edit/")
+    @require_admin
+    async def get_edit(slot_id: int, **kwargs):
+        slot = await svc_get_slot(g.s, slot_id)
+        if not slot:
+            return await make_response("Not found", 404)
+        html = await render_template(
+            "_types/slot/_edit.html",
+            slot=slot,
+            #post=g.post_data['post'],
+            #calendar=g.calendar,
+        )
+        return await make_response(html)
+
+    @bp.get("/view/")
+    @require_admin
+    async def get_view(slot_id: int, **kwargs):
+        slot = await svc_get_slot(g.s, slot_id)
+        if not slot:
+            return await make_response("Not found", 404)
+        html = await render_template(
+            "_types/slot/_main_panel.html",
+            slot=slot,
+            #post=g.post_data['post'],
+            #calendar=g.calendar,
+        )
+        return await make_response(html)
+
+    @bp.delete("/")
+    @require_admin
+    @clear_cache(tag="calendars", tag_scope="all")
+    async def slot_delete(slot_id: int, **kwargs):
+        await svc_delete_slot(g.s, slot_id)
+        slots = await svc_list_slots(g.s, g.calendar.id)
+        html = await render_template("_types/slots/_man_panel.html", calendar=g.calendar, slots=slots)
+        return await make_response(html)
+
+    @bp.put("/")
+    @require_admin
+    @clear_cache(tag="calendars", tag_scope="all")
+    async def put(slot_id: int, **kwargs):
+        form = await request.form
+
+        name = (form.get("name") or "").strip()
+        description = (form.get("description") or "").strip() or None
+        days = {k: form.get(k) for k in ["mon", "tue", "wed", "thu", "fri", "sat", "sun"]}
+        time_start = parse_time(form.get("time_start"))
+        time_end = parse_time(form.get("time_end"))
+        cost = parse_cost(form.get("cost"))
+
+        # NEW
+        flexible = bool(form.get("flexible"))
+
+        field_errors: dict[str, list[str]] = {}
+
+        # Basic validation...
+        if not name:
+            field_errors.setdefault("name", []).append("Please enter a name for the slot.")
+
+        if not time_start:
+            field_errors.setdefault("time_start", []).append("Please select a start time.")
+
+        if not time_end:
+            field_errors.setdefault("time_end", []).append("Please select an end time.")
+
+        if time_start and time_end and time_end <= time_start:
+            field_errors.setdefault("time_end", []).append(
+                "End time must be after the start time."
+            )
+
+        if not any(form.get(d) for d in ["mon", "tue", "wed", "thu", "fri", "sat", "sun"]):
+            field_errors.setdefault("days", []).append(
+                "Please select at least one day."
+            )
+
+        if field_errors:
+            return jsonify(
+                {
+                    "message": "Please fix the highlighted fields.",
+                    "errors": field_errors,
+                }
+            ), 422
+
+        # DB update + friendly duplicate handling
+        try:
+            slot = await svc_update_slot(
+                g.s,
+                slot_id,
+                name=name,
+                description=description,
+                days=days,
+                time_start=time_start,
+                time_end=time_end,
+                cost=cost,
+                flexible=flexible,    # <--- NEW
+            )
+        except IntegrityError as e:
+            msg = str(e.orig) if getattr(e, "orig", None) else str(e)
+            if "uq_calendar_slots_unique_band" in msg or "duplicate key value" in msg:
+                field_errors = {
+                    "name": [f'A slot called “{name}” already exists on this calendar.']
+                }
+                return jsonify(
+                    {
+                        "message": "That slot name is already in use.",
+                        "errors": field_errors,
+                    }
+                ), 422
+
+            return jsonify(
+                {
+                    "message": "An unexpected error occurred while updating the slot.",
+                    "errors": {"__all__": [msg]},
+                }
+            ), 422
+
+        html = await render_template(
+            "_types/slot/_main_panel.html",
+            slot=slot,
+            oob=True,
+        )
+        return await make_response(html)
+
+    
+
+    return bp