feat(apps): OBD2 placeholder rail item (launchpad for the parked OBD2 project)

Adds an OBD2 item to the Apps rail; with no records UI deployed yet it links to
the OBD2 Telemetry project + tasks and the research/wiki page rather than
embedding. Swap to embedView once LubeLogger/Tracktor is up. → 2.1.1.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

public/views/obd2.js

@@ -0,0 +1,27 @@
+// #/obd2 — Apps rail placeholder for the OBD2 Telemetry project (parked).
+// No records UI is deployed yet, so this links into the project + wiki instead of
+// embedding. Swap to embedView({ src: 'https://obd2.hynesy.com/' }) once the
+// LubeLogger/Tracktor dashboard is up.
+import { el, mount } from '../dom.js';
+import { navigate } from '../router.js';
+
+const WIKI = '/page/bea9d582-44a2-4eec-a1ba-69ade15d3a73';
+const PROJECT = '/project/02fc5b4c-12f4-4d0c-8220-6b053da71c46';
+
+export async function render(main) {
+  mount(main,
+    el('div', { class: 'term-bar' },
+      el('span', { class: 'term-title' }, '◆ OBD2 Telemetry'),
+      el('span', { class: 'muted', style: { fontSize: '11px' } }, 'project · parked, being set up')
+    ),
+    el('div', { class: 'card', style: { maxWidth: '760px' } },
+      el('h3', {}, 'OBD2 Telemetry — being set up'),
+      el('p', { class: 'muted' }, 'Capture vehicle records from the car’s OBD2 port into the homelab (CT 112 · Postgres + TimescaleDB) with a maintenance/records UI. The capture pipeline is being rebuilt and the records UI isn’t deployed yet — nothing to embed here yet.'),
+      el('p', {}, 'Plan: AndrOBD (F-Droid) + the BT ELM327 → CSV/MQTT → Timescale; WiCAN hardware later; LubeLogger / Tracktor for the UI (this tile will then embed it).'),
+      el('div', { style: { display: 'flex', gap: '8px', marginTop: '14px' } },
+        el('button', { class: 'primary', onclick: () => navigate(PROJECT) }, 'Project + tasks'),
+        el('button', { class: 'ghost', onclick: () => navigate(WIKI) }, 'Research / wiki')
+      )
+    )
+  );
+}