fix: share-link first visit doesn't open anchor modal (#470)

.gitignore

@@ -5,6 +5,8 @@ node_modules/
 !website/public/hmze-logo.png
 !docs/workflow-diagram.svg
 .playwright-mcp/
+.venv/
+.linkedin/
 *:Zone.Identifier
 website/public/CONTRIBUTING.html
 website/public/CONTRIBUTING.de.html

website/src/components/anchor-modal.js

@@ -356,10 +356,10 @@ export async function loadAnchorContent(anchorId) {
 }
 
 export function showAnchorDetails(anchorId) {
-  const modal = document.getElementById('anchor-modal')
-  if (modal) {
-    modal.dataset.currentAnchor = anchorId
-  }
+  // Share-link race: handleRoute may invoke us before initApp's createModal()
+  // microtask runs. createModal is idempotent.
+  const modal = document.getElementById('anchor-modal') || createModal()
+  modal.dataset.currentAnchor = anchorId
   openModal()
   return loadAnchorContent(anchorId)
 }

website/src/components/anchor-modal.test.js

@@ -155,6 +155,22 @@ describe('anchor-modal', () => {
       const content = document.getElementById('modal-content')
       expect(content.innerHTML).toContain('Failed to load')
     })
+
+    it('should not crash when modal element is missing (share-link race, #470)', async () => {
+      const existing = document.getElementById('anchor-modal')
+      if (existing) existing.remove()
+
+      global.fetch.mockResolvedValue({
+        ok: true,
+        text: async () => '= Test Anchor\n\nTest content',
+      })
+
+      await expect(showAnchorDetails('test-anchor')).resolves.not.toThrow()
+
+      const modal = document.getElementById('anchor-modal')
+      expect(modal).not.toBeNull()
+      expect(modal.classList.contains('hidden')).toBe(false)
+    })
   })
 
   describe('umbrella anchors', () => {