refactor: rename share URL path from location to bills-due

- Renamed directory: app/[locale]/share/location -> app/[locale]/share/bills-due
- Updated all URL references in web-app (billActions, locationActions, ViewBillCard)
- Updated all URL references in email-worker templates (4 email templates)
- Updated documentation in sprints/email-worker.md

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.claude/settings.local.json

@@ -28,7 +28,8 @@
       "Bash(grep:*)",
       "Bash(for file in CommError HTTPResponseError JsonParsingError clientIpAddress)",
       "Bash(do echo \"=== $file ===\")",
-      "Bash(done)"
+      "Bash(done)",
+      "Bash(git restore:*)"
     ]
   },
   "enableAllProjectMcpServers": true,