test: re-point suite off retired standalone views

Phase-1 fallout: delete tests for deleted pages, re-point moved-behavior
tests to the trip/home page where the content now lives.

- maps.spec: keep M4/M7/M8 (home+trip maps); drop M1-3,5,6,9-11 (/map,
  /dailies & /stories mini-maps)
- map-ux: re-point MUX4/5 sort toggle to #trip-sort-toggle on trip page
- nav: N1->trip page, N2->home, drop N3 (/stats) + N5 (obsolete skip)
- dailies: T1->trip page; T2->trip page with oldest-first assertion;
  fix T3-T6 stale entry-detail selectors (.entry-* -> .journal-post-*,
  pre-existing failures from an earlier entry redesign)
- stories: S1/S5 -> trip feed story cards ([data-type=story])
- gpx-journey: load MapUtils from the trip page instead of /map
- a11y: A4 photo strips -> trip page; drop AX3 (covered by AX2)
- post/helpers: verify posted entry on the trip page (ACTIVE_TRIP_URL)

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

tests/ui/gpx/gpx-journey.spec.js

@@ -1,13 +1,13 @@
 // @ts-check
 // Tests: G1–G5 — buildJourneySegments algorithm correctness
-// These tests load the italy-2026-demo map page (which has GPX) to get MapUtils in scope,
-// then call the functions with synthetic data via page.evaluate.
+// These tests load the italy-2026-demo trip page (which has GPX + the map bundle) to get
+// MapUtils in scope, then call the functions with synthetic data via page.evaluate.
 // Requires demo data: run `make demo-load` before this suite.
 const { test, expect } = require('@playwright/test');
 
 async function getMapUtils(page) {
-    await page.goto('/trips/italy-2026-demo/map');
-    await expect(page.locator('canvas.maplibregl-canvas')).toBeVisible({ timeout: 10000 });
+    await page.goto('/trips/italy-2026-demo');
+    await expect(page.locator('#trip-map canvas.maplibregl-canvas')).toBeVisible({ timeout: 10000 });
 }
 
 // G1: No GPX → all pairs connected in one segment