UI tweaks + city case fix

- Migration 20: collapse `Nairobi`/`nairobi` in domain.vehicles → 'nairobi'
- Remove the SLO panel from the top band (filter + tile rows stay)
- Offline vehicles render as solid grey instead of dim-cost-centre tint;
  opacity now only differentiates moving (1.0) vs parked (0.75) vs
  offline (0.55) so colour carries identity + state cleanly

db/migrations/20260601000020_normalize_assigned_city.sql

@@ -0,0 +1,16 @@
+-- migrate:up
+--
+-- Data hygiene: 1 vehicle had `assigned_city = 'Nairobi'` while the other
+-- 54 had `'nairobi'`. Collapse to lower-case so the filter dropdown shows
+-- a single canonical option. The projector doesn't set assigned_city (it
+-- comes from manual edits / roster imports) so no other code change is
+-- needed to prevent recurrence.
+
+UPDATE domain.vehicles
+   SET assigned_city = trim(lower(assigned_city)),
+       updated_at = now()
+ WHERE assigned_city IS NOT NULL
+   AND assigned_city != trim(lower(assigned_city));
+
+-- migrate:down
+-- No-op: re-introducing inconsistent casing would be a regression.

web/fleet-core.js

@@ -141,16 +141,19 @@ export function initMap(elementId, opts = {}) {
           15, 13,
           18, 20,
         ],
-        // Always tint by cost-centre colour — operational state is shown
-        // via opacity (moving=1, parked=0.7, offline=0.35) so colour stays
-        // a stable identity cue and the filter dropdown can double as a
-        // colour legend.
-        'circle-color': ['coalesce', ['get', 'cost_centre_color'], '#94a3b8'],
+        // Cost-centre tint for moving + parked; offline goes solid grey
+        // (no cost-centre signal worth showing when we haven't heard from
+        // the device). Opacity differentiates moving vs parked.
+        'circle-color': [
+          'case',
+          ['==', ['get', 'operational_state'], 'offline'], '#9ca3af',
+          ['coalesce', ['get', 'cost_centre_color'], '#94a3b8'],
+        ],
         'circle-opacity': [
           'case',
           ['==', ['get', 'operational_state'], 'moving'], 1.0,
-          ['==', ['get', 'operational_state'], 'parked'], 0.7,
-          0.35,
+          ['==', ['get', 'operational_state'], 'parked'], 0.75,
+          0.55,
         ],
         'circle-stroke-color': '#0b1220',
         'circle-stroke-width': [

web/index-live.html

@@ -38,7 +38,7 @@
     /* ─────────── top dashboard band: tiles + slos + filters ─────────── */
     .top-band {
       display: grid;
-      grid-template-columns: minmax(260px,auto) minmax(260px,1fr) minmax(280px,auto);
+      grid-template-columns: minmax(260px,1fr) minmax(280px,auto);
       gap: 16px;
       padding: 10px 16px;
       background: var(--panel);
@@ -210,10 +210,6 @@
       <div class="band-title">Fleet now</div>
       <div class="band-row" id="summary"></div>
     </div>
-    <div class="band-block">
-      <div class="band-title">SLOs</div>
-      <div class="band-row" id="slos" style="flex-direction:column; gap:4px;"></div>
-    </div>
     <div class="band-block">
       <div class="band-title">Filters</div>
       <div class="band-row" id="filters">
@@ -258,7 +254,6 @@
 
     const map = initMap('map');
     const summaryEl = document.getElementById('summary');
-    const slosEl    = document.getElementById('slos');
     let currentFilters = {};
     let activeSelection = { costCentres: [], cities: [] };
 
@@ -266,7 +261,7 @@
       try {
         const params = Object.keys(currentFilters).length ? { filters: currentFilters } : {};
         const payload = await apiFetch('/api/views/live', { params });
-        renderView(map, payload, { summaryRoot: summaryEl, sloRoot: slosEl });
+        renderView(map, payload, { summaryRoot: summaryEl });
         // Repopulate filter dropdowns from the latest features
         const features = (payload.geojson && payload.geojson.features) || [];
         filters.updateOptions(features);