Add a log view, and Docker packaging

The Log button shows the running daemon live: feed scans, downloads,
torrents and every HTTP request. It reads a ring buffer filled by a
tracing layer rather than tailing a file, so it works under Docker where
logs go to stdout. The access-log middleware skips /api/logs, or the
panel's poll would log itself forever.

Detached torrents could leave a row stuck in 'downloading' across a
restart, where nothing would ever revisit it; those are requeued at
startup.

Dockerfile, entrypoint and compose: 114 MB runtime, config bound to
0.0.0.0 on first run since container loopback is unreachable, drops to
PUID:PGID for Unraid, and a healthcheck that goes through the control
socket so a wedged worker reads as unhealthy.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AdXho5tTkjFLeUXKbEjKBh

docker-entrypoint.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+set -e
+
+# A container's loopback is not reachable from outside it, so the default bind of
+# 127.0.0.1 would leave the UI unreachable. Write a starter config that binds 0.0.0.0
+# on first run; after that the file is yours and is never rewritten.
+if [ ! -f "$IPX_CONFIG" ]; then
+    mkdir -p "$(dirname "$IPX_CONFIG")"
+    cat > "$IPX_CONFIG" <<TOML
+[general]
+download_dir = "/downloads"
+schedule     = "every 60m"
+max_total_gb = 0
+max_age_days = 0
+
+[torrent]
+enabled    = true
+port_range = "6881-6889"
+
+[web]
+enabled = true
+bind    = "0.0.0.0:8099"
+token   = ""
+TOML
+    echo "ipx: wrote a starter config to $IPX_CONFIG"
+fi
+
+mkdir -p "$IPX_DATA_DIR" /downloads
+
+# Unraid shares expect 99:100. Running as root would leave root-owned downloads.
+if [ "$(id -u)" = "0" ] && [ -n "$PUID" ] && [ -n "$PGID" ]; then
+    if ! getent group ipx >/dev/null 2>&1; then addgroup --gid "$PGID" ipx 2>/dev/null || true; fi
+    if ! getent passwd ipx >/dev/null 2>&1; then
+        adduser --uid "$PUID" --gid "$PGID" --disabled-password --gecos "" ipx 2>/dev/null || true
+    fi
+    chown -R "$PUID:$PGID" "$IPX_DATA_DIR" "$(dirname "$IPX_CONFIG")" 2>/dev/null || true
+    exec gosu "$PUID:$PGID" "$@"
+fi
+
+exec "$@"