feat: initialize blog app with blueprints and templates

Extract blog-specific code from the coop monolith into a standalone
repository. Includes auth, blog, post, admin, menu_items, snippets
blueprints, associated templates, Dockerfile (APP_MODULE=app:app),
entrypoint, and Gitea CI workflow.

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

bp/admin/routes.py

@@ -0,0 +1,67 @@
+from __future__ import annotations
+
+#from quart import Blueprint, g
+
+from quart import (
+    render_template,
+    make_response,
+    Blueprint,
+    redirect,
+    url_for,
+    request,
+    jsonify
+)
+from suma_browser.app.redis_cacher import clear_all_cache
+from suma_browser.app.authz import require_admin
+from suma_browser.app.utils.htmx import is_htmx_request
+from config import config
+from datetime import datetime
+
+def register(url_prefix):
+    bp = Blueprint("settings", __name__, url_prefix = url_prefix)
+
+    @bp.context_processor
+    async def inject_root():
+      return {
+        "base_title": f"{config()['title']} settings",
+      }
+
+    @bp.get("/")
+    @require_admin
+    async def home():
+
+      # Determine which template to use based on request type and pagination
+      if not is_htmx_request():
+          # Normal browser request: full page with layout
+          html = await render_template(
+          "_types/root/settings/index.html",
+      )
+      
+      else:
+          html = await render_template("_types/root/settings/_oob_elements.html")
+
+
+      return await make_response(html)
+
+    @bp.get("/cache/")
+    @require_admin
+    async def cache():
+        if not is_htmx_request():
+            html = await render_template("_types/root/settings/cache/index.html")
+        else:
+            html = await render_template("_types/root/settings/cache/_oob_elements.html")
+        return await make_response(html)
+
+    @bp.post("/cache_clear/")
+    @require_admin
+    async def cache_clear():
+        await clear_all_cache()
+        if is_htmx_request():
+            now = datetime.now()
+            html = f'<span class="text-green-600 font-bold">Cache cleared at {now.strftime("%H:%M:%S")}</span>'
+            return html
+
+        return redirect(url_for("settings.cache"))
+    return bp
+
+