feat: 3-step edit form, share card redesign, map fixes

- EditForm: refactored to 3-step flow matching NewEntryForm (details → photos → memo), transport icons with bigger images
- ShareCard: profile image, "You've colored X% of the world map" hero stat, removed stat boxes and continent bar, font embedding fix for PNG export, renamed brand to Journi
- JourneyView: auto-close after journey complete
- WorldMap: removed home marker icon, fix home marker reposition on resize

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/world-map/WorldMap.svelte

@@ -5,7 +5,6 @@
   import worldData from 'world-atlas/countries-50m.json';
   import { getSelected, setTotalCount, getFlashing } from '../layout/selection.svelte.js';
   import { getUserProfile } from '../auth/userStore.svelte.js';
-  import homeIconUrl from '../../assets/home.png';
   import { nameToId } from '../shared/countries.js';
   import crayonCursorUrl from '../../assets/logo-cursor.png';
 
@@ -82,29 +81,6 @@
   let _pathFn = null;
   let _countries = null;
 
-  function updateHomeMarker(homeCountryName) {
-    if (!_g || !_pathFn || !_countries) return;
-    _g.selectAll('.home-marker').remove();
-    if (!homeCountryName) return;
-    const found = _countries.find(f => f.properties.name === homeCountryName);
-    if (!found) return;
-    const [cx, cy] = _pathFn.centroid(found);
-    if (isNaN(cx) || isNaN(cy)) return;
-    const SIZE = 18;
-    _g.append('image')
-      .attr('class', 'home-marker')
-      .attr('href', homeIconUrl)
-      .attr('x', cx - SIZE / 2)
-      .attr('y', cy - SIZE / 2)
-      .attr('width', SIZE)
-      .attr('height', SIZE)
-      .style('pointer-events', 'none');
-  }
-
-  $effect(() => {
-    const homeCountry = getUserProfile()?.homeCountry ?? null;
-    updateHomeMarker(homeCountry);
-  });
 
   function fitProjection(proj, w, h) {
     proj.fitSize([w, h], { type: 'Sphere' });
@@ -231,7 +207,6 @@
     }
 
     renderMicrostates();
-    updateHomeMarker(getUserProfile()?.homeCountry ?? null);
 
     const zoom = d3.zoom()
       .scaleExtent([1, 32])
@@ -257,7 +232,6 @@
         countryPaths.attr('d', path);
         updateFill(countryPaths);
         renderMicrostates();
-        updateHomeMarker(getUserProfile()?.homeCountry ?? null);
       }
     });