Monorepo: consolidate 7 repos into one

Combines shared, blog, market, cart, events, federation, and account
into a single repository. Eliminates submodule sync, sibling model
copying at build time, and per-app CI orchestration.

Changes:
- Remove per-app .git, .gitmodules, .gitea, submodule shared/ dirs
- Remove stale sibling model copies from each app
- Update all 6 Dockerfiles for monorepo build context (root = .)
- Add build directives to docker-compose.yml
- Add single .gitea/workflows/ci.yml with change detection
- Add .dockerignore for monorepo build context
- Create __init__.py for federation and account (cross-app imports)

blog/app.py

@@ -0,0 +1,138 @@
+from __future__ import annotations
+import path_setup  # noqa: F401  # adds shared/ to sys.path
+from pathlib import Path
+
+from quart import g, request
+from jinja2 import FileSystemLoader, ChoiceLoader
+from sqlalchemy import select
+
+from shared.infrastructure.factory import create_base_app
+from shared.config import config
+from shared.models import KV
+
+from bp import (
+    register_blog_bp,
+    register_admin,
+    register_menu_items,
+    register_snippets,
+    register_fragments,
+)
+
+
+async def blog_context() -> dict:
+    """
+    Blog app context processor.
+
+    - cart_count/cart_total: via cart service (shared DB)
+    - cart_mini_html / auth_menu_html / nav_tree_html: pre-fetched fragments
+    """
+    from shared.infrastructure.context import base_context
+    from shared.services.navigation import get_navigation_tree
+    from shared.services.registry import services
+    from shared.infrastructure.cart_identity import current_cart_identity
+    from shared.infrastructure.fragments import fetch_fragments
+
+    ctx = await base_context()
+
+    # Fallback for _nav.html when nav-tree fragment fetch fails
+    ctx["menu_items"] = await get_navigation_tree(g.s)
+
+    # Cart data via service (replaces cross-app HTTP API)
+    ident = current_cart_identity()
+    summary = await services.cart.cart_summary(
+        g.s, user_id=ident["user_id"], session_id=ident["session_id"],
+    )
+    ctx["cart_count"] = summary.count + summary.calendar_count + summary.ticket_count
+    ctx["cart_total"] = float(summary.total + summary.calendar_total + summary.ticket_total)
+
+    # Pre-fetch cross-app HTML fragments concurrently
+    # (fetch_fragment auto-skips when inside a fragment request to prevent circular deps)
+    user = getattr(g, "user", None)
+    cart_params = {}
+    if ident["user_id"] is not None:
+        cart_params["user_id"] = ident["user_id"]
+    if ident["session_id"] is not None:
+        cart_params["session_id"] = ident["session_id"]
+
+    auth_params = {"email": user.email} if user else {}
+    nav_params = {"app_name": "blog", "path": request.path}
+
+    cart_mini_html, auth_menu_html, nav_tree_html = await fetch_fragments([
+        ("cart", "cart-mini", cart_params or None),
+        ("account", "auth-menu", auth_params or None),
+        ("blog", "nav-tree", nav_params),
+    ])
+    ctx["cart_mini_html"] = cart_mini_html
+    ctx["auth_menu_html"] = auth_menu_html
+    ctx["nav_tree_html"] = nav_tree_html
+
+    return ctx
+
+
+def create_app() -> "Quart":
+    from services import register_domain_services
+
+    app = create_base_app(
+        "blog",
+        context_fn=blog_context,
+        domain_services_fn=register_domain_services,
+    )
+
+    # App-specific templates override shared templates
+    app_templates = str(Path(__file__).resolve().parent / "templates")
+    app.jinja_loader = ChoiceLoader([
+        FileSystemLoader(app_templates),
+        app.jinja_loader,
+    ])
+
+    # --- blueprints ---
+    app.register_blueprint(
+        register_blog_bp(
+            url_prefix=config()["blog_root"],
+            title=config()["blog_title"],
+        ),
+        url_prefix=config()["blog_root"],
+    )
+
+    app.register_blueprint(register_admin("/settings"))
+    app.register_blueprint(register_menu_items())
+    app.register_blueprint(register_snippets())
+    app.register_blueprint(register_fragments())
+
+    # --- KV admin endpoints ---
+    @app.get("/settings/kv/<key>")
+    async def kv_get(key: str):
+        row = (
+            await g.s.execute(select(KV).where(KV.key == key))
+        ).scalar_one_or_none()
+        return {"key": key, "value": (row.value if row else None)}
+
+    @app.post("/settings/kv/<key>")
+    async def kv_set(key: str):
+        data = await request.get_json() or {}
+        val = data.get("value", "")
+        obj = await g.s.get(KV, key)
+        if obj is None:
+            obj = KV(key=key, value=val)
+            g.s.add(obj)
+        else:
+            obj.value = val
+        return {"ok": True, "key": key, "value": val}
+
+    # --- debug: url rules ---
+    @app.get("/__rules")
+    async def dump_rules():
+        rules = []
+        for r in app.url_map.iter_rules():
+            rules.append({
+                "endpoint": r.endpoint,
+                "rule": repr(r.rule),
+                "methods": sorted(r.methods - {"HEAD", "OPTIONS"}),
+                "strict_slashes": r.strict_slashes,
+            })
+        return {"rules": rules}
+
+    return app
+
+
+app = create_app()