fix: restore list map previews (batch geojson query)

Map previews were missing on every list view (activities, routes, home,
profile, feed): the batch geojson helpers used `WHERE id = ANY(${ids}::text[])`,
but drizzle expands a JS array in a sql template to `($1,$2,...)`, producing the
invalid `ANY((...)::text[])`. That throws, and the helpers' `try/catch` swallowed
it — so every card fell back to "No map preview".

Rewrite getSimplifiedActivityGeojsonBatch (activities) and getSimplifiedGeojsonBatch
(routes) to use the query builder: `inArray(table.id, ids)` for the id list +
a raw `ST_AsGeoJSON(ST_Simplify(geom, 0.001))` select column. Same result, valid
SQL.

E2E: list-map-previews.test.ts creates an activity with geometry and asserts a
Leaflet preview renders on /activities (no "No map preview"). Registered in
playwright.config. typecheck + lint + unit (journal 315) green; verified in the
browser.

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

playwright.config.ts

@@ -130,6 +130,14 @@ export default defineConfig({
         baseURL: "http://localhost:3000",
       },
     },
+    {
+      name: "list-map-previews",
+      testMatch: "list-map-previews.test.ts",
+      use: {
+        ...devices["Desktop Chrome"],
+        baseURL: "http://localhost:3000",
+      },
+    },
   ],
   webServer: process.env.CI
     ? [