chore: remove stale agent reports and add PYTHONDONTWRITEBYTECODE export to Makefile

Delete four stale SEO and style agent report JSON/MD files from agents/reports/ that had zero findings or were superseded. Export PYTHONDONTWRITEBYTECODE=1 in the Makefile so all make targets suppress bytecode generation, and add a `tree` target that lists the repository file tree via git ls-tree. Update AGENTS.md and CLAUDE.md documentation to reflect that routers now form a directory tree mirroring URL paths and that bytecode writing is disabled project-wide.

devplacepy/routers/profile/usage.py

@@ -0,0 +1,28 @@
+# retoor <retoor@molodetz.nl>
+
+import logging
+
+from devplacepy.services.manager import service_manager
+
+logger = logging.getLogger(__name__)
+
+
+def _ai_quota(
+    user_uid: str, include_cost: bool = False, is_admin: bool = False
+) -> dict | None:
+    devii = service_manager.get_service("devii")
+    if devii is None:
+        return None
+    try:
+        limit = devii.daily_limit_for("user", is_admin)
+        spent = devii.spent_24h("user", user_uid)
+        turns = devii.hub().ledger.turns_24h("user", user_uid)
+    except Exception:
+        logger.exception("Failed to compute AI quota for %s", user_uid)
+        return None
+    used_pct = round(min(100.0, spent / limit * 100), 1) if limit > 0 else 0.0
+    quota = {"used_pct": used_pct, "turns": turns}
+    if include_cost:
+        quota["spent_usd"] = round(spent, 4)
+        quota["limit_usd"] = round(limit, 2)
+    return quota