chore: rename quicproquo → quicprochat in docs, Docker, CI, and packaging

Rename all project references from quicproquo/qpq to quicprochat/qpc
across documentation, Docker configuration, CI workflows, packaging
scripts, operational configs, and build tooling.

- Docker: crate paths, binary names, user/group, data dirs, env vars
- CI: workflow crate references, binary names, artifact names
- Docs: all markdown files under docs/, SDK READMEs, book.toml
- Packaging: OpenWrt Makefile, init script, UCI config (file renames)
- Scripts: justfile, dev-shell, screenshot, cross-compile, ai_team
- Operations: Prometheus config, alert rules, Grafana dashboard
- Config: .env.example (QPQ_* → QPC_*), CODEOWNERS paths
- Top-level: README, CONTRIBUTING, ROADMAP, CLAUDE.md

sdks/web/public/sw.js

@@ -1,5 +1,5 @@
 /**
- * quicproquo Service Worker — provides offline caching and background
+ * quicprochat Service Worker — provides offline caching and background
  * notification support for the PWA.
  */
 
@@ -67,11 +67,11 @@ self.addEventListener("push", (event) => {
   try {
     payload = event.data.json();
   } catch {
-    payload = { title: "quicproquo", body: event.data.text() };
+    payload = { title: "quicprochat", body: event.data.text() };
   }
 
   event.waitUntil(
-    self.registration.showNotification(payload.title || "quicproquo", {
+    self.registration.showNotification(payload.title || "quicprochat", {
       body: payload.body || "New message",
       icon: "/icon-192.png",
       badge: "/icon-192.png",