Closes the on-demand-capture leak cluster from the code review. The capture's armed state was driven off SignalR's ConnectionId, which changes on every transport reconnect, so a reconnect-during-view leaked a subscriber and left the capture armed forever with no viewer. PlcSubscriptionTracker now keys on a stable per-page-load tabId, and StatusBroadcaster reconciles capture arm state from the live viewer set each push cycle — making arming single-threaded and reconnect-safe. Also fixes the TagValueCapture disarm-vs-record race, the bind-failure broadcaster/listener leak, removes dead JSON-context code, and reworks the frontend cold-start retry plus an unknown-PLC watchdog. Adds tracker / broadcaster-loop / race / wire-shape test coverage.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Reviewed the new SignalR dashboard and fixed its two top findings: a stored XSS on the connection-detail page (unescaped tag name / direction / timestamp rendered into innerHTML) and FC03/FC04 cache hits bypassing the debug-view capture, which left cached tags frozen while their age climbed. Also adds an optional human-friendly Name to BCD tags surfaced on the debug view, and loads the real fleet config from tags.txt (12 named BCD tags, PLC Z28061) so the published appsettings.json is deploy-ready.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The single auto-refreshing zero-JS status page gave operators a 25-column
wall and no way to drill into one connection. This adds a Bootstrap fleet
dashboard (filterable/sortable KPI table) and a per-PLC detail page with a
real-time debug view of raw PLC-side BCD vs. decoded client-side values,
streamed live over a SignalR feed. The debug view is fed by an on-demand
per-tag value capture, armed only while a detail page is open. All assets
(Bootstrap, SignalR client, fonts) are embedded so the UI works unchanged
on firewalled networks; GET /status.json is untouched for scrapers.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The DL205/DL260 ECOM emits no TCP keepalives, so an idle backend socket
can be silently dropped by a middlebox (switch, firewall, NAT) after
2-5 minutes. Enable OS SO_KEEPALIVE on backend and accepted upstream
sockets, and drive a periodic synthetic FC03 heartbeat on each idle
backend socket so a dead path is detected before a real client request
hits it. Controlled by Connection.Keepalive (ON by default).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The standalone design.md, kpi.md, operations.md, and the docs/plan/
phase tree were point-in-time planning artefacts now superseded by the
topic-organized docs/ tree (Architecture/, Features/, Operations/,
Reference/, Testing/). The DL260/ folder mixed a device-reference doc, a
test fixture, a sample test, and a screenshot; its contents now live in
their natural homes (dl205.md + mbtcp_settings.JPG under docs/Reference/,
dl205.json next to its launcher in tests/sim/, sample test dropped).
All cross-references in the surviving docs, README, CLAUDE.md, the config
template, and source comments are repointed to the new locations.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Joseph Doherty