Explore: personal GPS heatmap tab under Athlete page

- bincio/explore.py: bake_tracks() simplifies GPS coords (RDP ε=0.0001),
  strips to [lng,lat], groups by sport type, writes per-handle tracks.json
- bake-tracks CLI command; render CLI calls _bake_tracks() after each build;
  strava_zip runs it once at end of batch
- /api/me/tracks endpoint serves the baked file; wipe_user cleans it up
- Explore.svelte: MapLibre full-screen map with sidebar — type pills,
  year/month date filter, Lines / Heatmap (global or by-type) view modes
- AthleteView: Explore tab visible only to profile owner (checks __bincioMe)
- Base.astro: fullscreen prop + Planner nav link

site/src/components/AthleteView.svelte

@@ -4,6 +4,7 @@
   import MmpChart from './MmpChart.svelte';
   import RecordsView from './RecordsView.svelte';
   import AthleteDrawer from './AthleteDrawer.svelte';
+  import Explore from './Explore.svelte';
   import { isUnlisted, formatElapsed, formatDistance, sportIcon } from '../lib/format';
   import { loadIndex, loadAthlete } from '../lib/dataloader';
 
@@ -21,9 +22,10 @@
   let error: string | null = null;
   let drawerOpen = false;
 
-  type Tab = 'power' | 'records' | 'segments' | 'profile';
+  type Tab = 'power' | 'records' | 'segments' | 'profile' | 'explore';
   let activeTab: Tab = 'power';
   let mounted = false;
+  let isOwner = false;
 
   interface SegmentSummaryItem {
     segment: { id: string; name: string; sport: string | null; distance_m: number };
@@ -80,9 +82,11 @@
   }
 
   onMount(async () => {
-    const TABS: Tab[] = ['power', 'records', 'segments', 'profile'];
+    isOwner = (window as any).__bincioMe === handle;
+    const TABS: Tab[] = ['power', 'records', 'segments', 'profile', 'explore'];
     const rawTab = new URLSearchParams(window.location.search).get('tab');
-    activeTab = TABS.includes(rawTab as Tab) ? (rawTab as Tab) : 'power';
+    const resolved = TABS.includes(rawTab as Tab) ? (rawTab as Tab) : 'power';
+    activeTab = (resolved === 'explore' && !isOwner) ? 'power' : resolved;
     mounted = true;
 
     // Resolve handle for the segments endpoint
@@ -140,12 +144,14 @@
     return hi >= 900 ? `${lo}+ bpm` : `${lo}–${hi} bpm`;
   }
 
-  const TABS: { key: Tab; label: string }[] = [
+  const ALL_TABS: { key: Tab; label: string; ownerOnly?: boolean }[] = [
     { key: 'power',    label: 'Power Curve' },
     { key: 'records',  label: 'Records'     },
     { key: 'segments', label: 'Segments'    },
     { key: 'profile',  label: 'Profile'     },
+    { key: 'explore',  label: 'Explore', ownerOnly: true },
   ];
+  $: TABS = ALL_TABS.filter(t => !t.ownerOnly || isOwner);
 </script>
 
 {#if loading}
@@ -325,6 +331,12 @@
       </div>
     {/if}
 
+  <!-- Explore tab -->
+  {:else if activeTab === 'explore'}
+    <div style="height: calc(100vh - 200px); margin: 0 -1rem -1.5rem;">
+      <Explore {handle} {base} embedded={true} />
+    </div>
+
   <!-- Profile tab -->
   {:else if activeTab === 'profile'}
     <div class="grid grid-cols-1 md:grid-cols-2 gap-4">

site/src/components/Explore.svelte

@@ -0,0 +1,410 @@
+<script lang="ts">
+  import { onMount, onDestroy } from 'svelte';
+  import maplibregl from 'maplibre-gl';
+  import 'maplibre-gl/dist/maplibre-gl.css';
+
+  export let handle: string;
+  export let base: string;
+  export let embedded: boolean = false;
+
+  interface Track { id: string; date: string; type: string; name: string; dist: number; coords: [number,number][]; }
+
+  let mapEl: HTMLDivElement;
+  let map: any;
+  let mapReady = false;
+
+  let tracks: Track[] = [];
+  let loading = true;
+  let error = '';
+
+  // Filters
+  let selectedTypes: Set<string> = new Set();
+  let dateFrom = '';
+  let dateTo = '';
+  let selectedYear: string | null = null;
+
+  // View
+  let viewMode: 'lines' | 'heatmap' = 'lines';
+  let heatmapMode: 'global' | 'bytype' = 'global';
+
+  // Tile layers — same as planner
+  const TILES: Record<string, { tiles: string[]; attribution: string; label: string }> = {
+    cyclosm:   { label: 'Cycle',     attribution: '© CyclOSM | © OpenStreetMap contributors', tiles: ['https://a.tile-cyclosm.openstreetmap.fr/cyclosm/{z}/{x}/{y}.png','https://b.tile-cyclosm.openstreetmap.fr/cyclosm/{z}/{x}/{y}.png','https://c.tile-cyclosm.openstreetmap.fr/cyclosm/{z}/{x}/{y}.png'] },
+    osm:       { label: 'OSM',       attribution: '© OpenStreetMap contributors',               tiles: ['https://tile.openstreetmap.org/{z}/{x}/{y}.png'] },
+    topo:      { label: 'Topo',      attribution: '© OpenTopoMap | © OpenStreetMap contributors', tiles: ['https://a.tile.opentopomap.org/{z}/{x}/{y}.png','https://b.tile.opentopomap.org/{z}/{x}/{y}.png','https://c.tile.opentopomap.org/{z}/{x}/{y}.png'] },
+    satellite: { label: 'Sat',       attribution: '© Esri World Imagery',                       tiles: ['https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}'] },
+  };
+  const TILE_ORDER = ['cyclosm', 'osm', 'topo', 'satellite'];
+  let tileKey = 'cyclosm';
+
+  const TYPE_COLORS: Record<string, string> = {
+    cycling: '#e879a0',
+    running: '#60a5fa',
+    hiking:  '#4ade80',
+    skiing:  '#93c5fd',
+    other:   '#a78bfa',
+  };
+  const HEAT_TYPES = Object.keys(TYPE_COLORS);
+
+  function typeColor(t: string): string { return TYPE_COLORS[t] ?? TYPE_COLORS.other; }
+
+  const MONTHS = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];
+
+  // ── Derived ────────────────────────────────────────────────────────────────
+
+  $: allTypes = [...new Set(tracks.map(t => t.type))].sort();
+  $: availableYears = [...new Set(tracks.map(t => t.date.slice(0,4)).filter(Boolean))].sort().reverse();
+
+  $: if (allTypes.length > 0 && selectedTypes.size === 0) selectedTypes = new Set(allTypes);
+
+  $: filteredTracks = tracks.filter(t => {
+    if (!selectedTypes.has(t.type)) return false;
+    if (dateFrom && t.date < dateFrom) return false;
+    if (dateTo && t.date > dateTo) return false;
+    return true;
+  });
+
+  $: if (mapReady) _updateMap(filteredTracks, viewMode, heatmapMode);
+
+  // ── Filters ────────────────────────────────────────────────────────────────
+
+  function setTile(key: string) {
+    tileKey = key;
+    map?.getSource('base')?.setTiles(TILES[key].tiles);
+  }
+
+  function toggleType(t: string) {
+    const s = new Set(selectedTypes);
+    s.has(t) ? s.delete(t) : s.add(t);
+    selectedTypes = s;
+  }
+
+  function selectAllTypes() { selectedTypes = new Set(allTypes); }
+  function clearAllTypes()  { selectedTypes = new Set(); }
+
+  function setYear(y: string) {
+    if (selectedYear === y) { selectedYear = null; dateFrom = ''; dateTo = ''; return; }
+    selectedYear = y;
+    dateFrom = `${y}-01-01`;
+    dateTo   = `${y}-12-31`;
+  }
+
+  function setMonth(m: number) { // m: 1-12
+    if (!selectedYear) return;
+    const mm  = String(m).padStart(2, '0');
+    const last = new Date(+selectedYear, m, 0).getDate();
+    dateFrom = `${selectedYear}-${mm}-01`;
+    dateTo   = `${selectedYear}-${mm}-${String(last).padStart(2,'0')}`;
+  }
+
+  function clearDates() { dateFrom = ''; dateTo = ''; selectedYear = null; }
+
+  // ── Map ────────────────────────────────────────────────────────────────────
+
+  function _linesGeoJSON(ts: Track[]) {
+    return { type: 'FeatureCollection', features: ts.map(t => ({
+      type: 'Feature',
+      geometry: { type: 'LineString', coordinates: t.coords },
+      properties: { type: t.type },
+    }))};
+  }
+
+  function _heatGeoJSON(ts: Track[]) {
+    const features: any[] = [];
+    for (const t of ts)
+      for (const [lng, lat] of t.coords)
+        features.push({ type: 'Feature', geometry: { type: 'Point', coordinates: [lng, lat] }, properties: { type: t.type } });
+    return { type: 'FeatureCollection', features };
+  }
+
+  function _empty() { return { type: 'FeatureCollection', features: [] }; }
+
+  function _hexRgb(hex: string): [number,number,number] {
+    const m = hex.match(/^#([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i);
+    return m ? [parseInt(m[1],16), parseInt(m[2],16), parseInt(m[3],16)] : [160,160,160];
+  }
+
+  function _updateMap(filtered: Track[], view: string, heatMode: string) {
+    const linesSrc = map.getSource('explore-lines');
+    const heatSrc  = map.getSource('explore-heat');
+    if (!linesSrc || !heatSrc) return;
+
+    linesSrc.setData(view === 'lines' ? _linesGeoJSON(filtered) : _empty());
+    heatSrc.setData(view === 'heatmap' ? _heatGeoJSON(filtered) : _empty());
+
+    map.setLayoutProperty('explore-lines', 'visibility', view === 'lines' ? 'visible' : 'none');
+    map.setLayoutProperty('explore-heat-global', 'visibility', view === 'heatmap' && heatMode === 'global' ? 'visible' : 'none');
+    for (const t of HEAT_TYPES)
+      map.setLayoutProperty(`explore-heat-${t}`, 'visibility', view === 'heatmap' && heatMode === 'bytype' ? 'visible' : 'none');
+  }
+
+  function _fitBounds(ts: Track[]) {
+    if (!ts.length) return;
+    let w = Infinity, e = -Infinity, s = Infinity, n = -Infinity;
+    for (const t of ts) for (const [lng, lat] of t.coords) {
+      if (lng < w) w = lng; if (lng > e) e = lng;
+      if (lat < s) s = lat; if (lat > n) n = lat;
+    }
+    if (w === Infinity) return;
+    map.fitBounds([[w,s],[e,n]], { padding: 40, maxZoom: 14 });
+  }
+
+  onMount(async () => {
+    try {
+      const r = await fetch('/api/me/tracks', { credentials: 'include' });
+      if (!r.ok) { error = r.status === 404 ? 'No tracks baked yet — upload activities first.' : `Error ${r.status}`; loading = false; return; }
+      const d = await r.json();
+      tracks = d.tracks ?? [];
+    } catch (e: any) { error = e.message ?? 'Failed to load'; loading = false; return; }
+    loading = false;
+
+    map = new maplibregl.Map({
+      container: mapEl,
+      style: { version: 8,
+        sources: { base: { type: 'raster', tiles: TILES.cyclosm.tiles, tileSize: 256, attribution: TILES.cyclosm.attribution } },
+        layers: [{ id: 'base', type: 'raster', source: 'base' }],
+      },
+      center: [12, 42], zoom: 5,
+    });
+    map.addControl(new maplibregl.NavigationControl(), 'top-right');
+
+    map.on('load', () => {
+      map.addSource('explore-lines', { type: 'geojson', data: _empty() });
+      map.addSource('explore-heat',  { type: 'geojson', data: _empty() });
+
+      // Lines layer — color by type
+      map.addLayer({ id: 'explore-lines', type: 'line', source: 'explore-lines', layout: { visibility: 'none' },
+        paint: { 'line-width': 2, 'line-opacity': 0.5,
+          'line-color': ['match', ['get', 'type'],
+            'cycling', TYPE_COLORS.cycling, 'running', TYPE_COLORS.running,
+            'hiking',  TYPE_COLORS.hiking,  'skiing',  TYPE_COLORS.skiing,
+            TYPE_COLORS.other],
+        },
+      });
+
+      // Global heatmap
+      map.addLayer({ id: 'explore-heat-global', type: 'heatmap', source: 'explore-heat', layout: { visibility: 'none' },
+        paint: { 'heatmap-radius': 14, 'heatmap-opacity': 0.85,
+          'heatmap-color': ['interpolate', ['linear'], ['heatmap-density'],
+            0, 'rgba(0,0,0,0)', 0.2, '#4ade80', 0.5, '#facc15', 0.8, '#f97316', 1, '#ef4444'],
+        },
+      });
+
+      // Per-type heatmap layers
+      for (const [type, hex] of Object.entries(TYPE_COLORS)) {
+        const [r,g,b] = _hexRgb(hex);
+        map.addLayer({ id: `explore-heat-${type}`, type: 'heatmap', source: 'explore-heat',
+          filter: ['==', ['get', 'type'], type], layout: { visibility: 'none' },
+          paint: { 'heatmap-radius': 14, 'heatmap-opacity': 0.85,
+            'heatmap-color': ['interpolate', ['linear'], ['heatmap-density'],
+              0, `rgba(${r},${g},${b},0)`, 0.3, `rgba(${r},${g},${b},0.4)`, 1, `rgba(${r},${g},${b},1)`],
+          },
+        });
+      }
+
+      mapReady = true;
+      _updateMap(tracks, viewMode, heatmapMode);
+      _fitBounds(tracks);
+    });
+  });
+
+  onDestroy(() => { if (map) map.remove(); });
+</script>
+
+<div class="explore-layout">
+  <!-- Sidebar -->
+  <aside class="sidebar">
+    {#if !embedded}
+    <header class="sidebar-header">
+      <span class="sidebar-title">Explore</span>
+      <a href="{base}u/{handle}/athlete/" class="back-link">← Athlete</a>
+    </header>
+    {/if}
+
+    <!-- Tile layer -->
+    <section class="section">
+      <p class="label">Map</p>
+      <div class="pills">
+        {#each TILE_ORDER as key}
+          <button class="pill" class:active={tileKey === key} onclick={() => setTile(key)}>{TILES[key].label}</button>
+        {/each}
+      </div>
+    </section>
+
+    <!-- Type filter -->
+    <section class="section">
+      <div class="label-row">
+        <p class="label">Type</p>
+        <div class="label-actions">
+          <button class="mini-btn" onclick={selectAllTypes}>all</button>
+          <button class="mini-btn" onclick={clearAllTypes}>none</button>
+        </div>
+      </div>
+      <div class="pills">
+        {#each allTypes as t}
+          <button class="pill type-pill" class:active={selectedTypes.has(t)} onclick={() => toggleType(t)}
+            style:--type-color={typeColor(t)}>
+            <span class="type-dot"></span>{t}
+          </button>
+        {/each}
+      </div>
+    </section>
+
+    <!-- Date filter -->
+    <section class="section">
+      <p class="label">Date</p>
+      <div class="pills year-pills">
+        <button class="pill" class:active={!dateFrom && !dateTo} onclick={clearDates}>All</button>
+        {#each availableYears as y}
+          <button class="pill" class:active={selectedYear === y} onclick={() => setYear(y)}>{y}</button>
+        {/each}
+      </div>
+      {#if selectedYear}
+        <div class="pills month-pills">
+          {#each MONTHS as m, i}
+            <button class="pill small"
+              class:active={dateFrom === `${selectedYear}-${String(i+1).padStart(2,'0')}-01`}
+              onclick={() => setMonth(i + 1)}>{m}</button>
+          {/each}
+        </div>
+      {/if}
+      <div class="date-inputs">
+        <input type="date" class="date-input" bind:value={dateFrom} placeholder="From" />
+        <input type="date" class="date-input" bind:value={dateTo}   placeholder="To" />
+      </div>
+    </section>
+
+    <!-- View toggle -->
+    <section class="section">
+      <p class="label">View</p>
+      <div class="pills">
+        <button class="pill" class:active={viewMode === 'lines'}   onclick={() => viewMode = 'lines'}>Lines</button>
+        <button class="pill" class:active={viewMode === 'heatmap'} onclick={() => viewMode = 'heatmap'}>Heatmap</button>
+      </div>
+      {#if viewMode === 'heatmap'}
+        <div class="pills" style="margin-top:0.375rem">
+          <button class="pill small" class:active={heatmapMode === 'global'} onclick={() => heatmapMode = 'global'}>Global</button>
+          <button class="pill small" class:active={heatmapMode === 'bytype'} onclick={() => heatmapMode = 'bytype'}>By type</button>
+        </div>
+      {/if}
+    </section>
+
+    <!-- Stats -->
+    <section class="section">
+      <p class="stat-line">
+        <span class="stat-val">{filteredTracks.length}</span>
+        <span class="muted"> / {tracks.length} tracks</span>
+      </p>
+      {#if filteredTracks.length > 0}
+        <p class="stat-line muted small">
+          {(filteredTracks.reduce((s,t) => s + t.dist, 0) / 1000).toFixed(0)} km total
+        </p>
+      {/if}
+    </section>
+
+    {#if loading}<p class="status">Loading tracks…</p>{/if}
+    {#if error}<p class="status error">{error}</p>{/if}
+  </aside>
+
+  <!-- Map -->
+  <div class="map-wrap" bind:this={mapEl}></div>
+</div>
+
+<style>
+  .explore-layout {
+    display: flex;
+    height: 100%;
+    overflow: hidden;
+  }
+
+  .sidebar {
+    width: 240px;
+    flex-shrink: 0;
+    background: var(--bg-card);
+    border-right: 1px solid var(--border);
+    display: flex;
+    flex-direction: column;
+    overflow-y: auto;
+  }
+
+  .sidebar-header {
+    padding: 0.75rem 1rem;
+    border-bottom: 1px solid var(--border);
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    flex-shrink: 0;
+  }
+  .sidebar-title { font-size: 0.9rem; font-weight: 700; color: var(--text-primary); }
+  .back-link { font-size: 0.72rem; color: var(--text-5); text-decoration: none; }
+  .back-link:hover { color: var(--text-4); }
+
+  .section {
+    padding: 0.75rem 1rem;
+    border-bottom: 1px solid var(--border-sub, var(--border));
+  }
+
+  .label {
+    font-size: 0.68rem;
+    font-weight: 600;
+    text-transform: uppercase;
+    letter-spacing: 0.06em;
+    color: var(--text-5);
+    margin: 0 0 0.45rem;
+  }
+
+  .label-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.45rem; }
+  .label-row .label { margin-bottom: 0; }
+  .label-actions { display: flex; gap: 0.25rem; }
+  .mini-btn { background: none; border: none; font-size: 0.65rem; color: var(--text-5); cursor: pointer; padding: 0 0.2rem; }
+  .mini-btn:hover { color: var(--text-4); }
+
+  .pills { display: flex; gap: 0.3rem; flex-wrap: wrap; }
+  .pill {
+    padding: 0.2rem 0.55rem;
+    border-radius: 999px;
+    border: 1px solid var(--border);
+    background: transparent;
+    color: var(--text-4);
+    font-size: 0.72rem;
+    cursor: pointer;
+    transition: all 0.12s;
+    display: flex;
+    align-items: center;
+    gap: 0.3rem;
+  }
+  .pill:hover { border-color: var(--accent); color: var(--accent); }
+  .pill.active { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }
+  .pill.small { padding: 0.15rem 0.45rem; font-size: 0.67rem; }
+
+  .type-pill.active { background: color-mix(in srgb, var(--type-color) 15%, transparent); border-color: var(--type-color); color: var(--type-color); }
+  .type-pill:hover  { border-color: var(--type-color); color: var(--type-color); }
+  .type-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--type-color); flex-shrink: 0; }
+
+  .year-pills { margin-bottom: 0.4rem; }
+  .month-pills { margin-bottom: 0.4rem; }
+
+  .date-inputs { display: flex; flex-direction: column; gap: 0.3rem; margin-top: 0.4rem; }
+  .date-input {
+    width: 100%;
+    padding: 0.25rem 0.4rem;
+    border-radius: 0.3rem;
+    border: 1px solid var(--border);
+    background: var(--bg-elevated, var(--bg));
+    color: var(--text-primary);
+    font-size: 0.72rem;
+    box-sizing: border-box;
+  }
+  .date-input:focus { outline: none; border-color: var(--accent); }
+
+  .stat-line { margin: 0 0 0.2rem; font-size: 0.8rem; }
+  .stat-val { font-weight: 600; color: var(--text-primary); }
+
+  .status { font-size: 0.72rem; color: var(--text-5); padding: 0.5rem 1rem 0; margin: 0; }
+  .status.error { color: #f87171; }
+
+  .muted { color: var(--text-5); }
+  .small { font-size: 0.72rem; margin: 0; }
+
+  .map-wrap { flex: 1; height: 100%; }
+</style>

site/src/layouts/Base.astro

@@ -7,8 +7,10 @@ interface Props {
   description?: string;
   /** Set true on pages that must remain accessible without auth (login, register). */
   public?: boolean;
+  /** Remove the content wrapper so a child can fill the remaining viewport. */
+  fullscreen?: boolean;
 }
-const { title = 'BincioActivity', description = 'Your personal activity stats', public: isPublicPage = false } = Astro.props;
+const { title = 'BincioActivity', description = 'Your personal activity stats', public: isPublicPage = false, fullscreen = false } = Astro.props;
 const editUrl      = import.meta.env.PUBLIC_EDIT_URL     ?? '';
 const wikiUrl      = import.meta.env.PUBLIC_WIKI_URL     ?? '';
 const plannerUrl   = import.meta.env.PUBLIC_PLANNER_URL  ?? '';
@@ -547,9 +549,15 @@ try {
     </div>
   )}
 
-  <main class="max-w-7xl mx-auto px-4 py-6">
-    <slot />
-  </main>
+  {fullscreen ? (
+    <main style="height:calc(100vh - 3rem);overflow:hidden">
+      <slot />
+    </main>
+  ) : (
+    <main class="max-w-7xl mx-auto px-4 py-6">
+      <slot />
+    </main>
+  )}
 
   <script>
     // Register service worker for local activity storage (offline support)

site/src/pages/u/[handle]/athlete/explore/index.astro

@@ -0,0 +1,18 @@
+---
+import Base from '../../../../../layouts/Base.astro';
+import Explore from '../../../../../components/Explore.svelte';
+import { readShardHandles } from '../../../../../lib/manifest';
+
+export function getStaticPaths() {
+  return readShardHandles().map(({ handle }) => ({
+    params: { handle },
+    props: { handle },
+  }));
+}
+
+const { handle } = Astro.props as { handle: string };
+const base = import.meta.env.BASE_URL;
+---
+<Base title={`@${handle} Explore — BincioActivity`} fullscreen>
+  <Explore {handle} {base} client:only="svelte" />
+</Base>