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

scripts/screenshot.sh

@@ -6,14 +6,14 @@ cd "$(git rev-parse --show-toplevel)"
 INTERACTIVE=false
 [[ "${1:-}" == "--interactive" ]] && INTERACTIVE=true
 
-SESSION="qpq-screenshot"
+SESSION="qpc-screenshot"
 SERVER_PORT=17123
 SERVER_ADDR="127.0.0.1:${SERVER_PORT}"
 DATA_DIR=$(mktemp -d)
 CERT="${DATA_DIR}/server-cert.der"
 KEY="${DATA_DIR}/server-key.der"
-QPQ="./target/debug/qpq"
-SERVER="./target/debug/qpq-server"
+QPQ="./target/debug/qpc"
+SERVER="./target/debug/qpc-server"
 SLOG="${DATA_DIR}/server.log"
 
 cleanup() {
@@ -26,7 +26,7 @@ trap cleanup EXIT
 
 # ── Build ────────────────────────────────────────────────────────────────────
 echo "Building binaries..."
-cargo build --bin qpq --bin qpq-server 2>&1 | tail -1
+cargo build --bin qpc --bin qpc-server 2>&1 | tail -1
 
 # ── Start server ─────────────────────────────────────────────────────────────
 echo "Starting server on ${SERVER_ADDR}..."