fix: harden web map pages against missing API and map data

[samwel141]

Description

Improves frontend resilience across the web map client when API responses are missing, incomplete, or when map initialization fails.

This change hardens wallet, planter, organization, and tree pages against crashes caused by:

• failed map initialization or bounds/view requests
• partial or missing related API data
• malformed SSR/ISR fallback handling
• invalid generated query params such as keyword=undefined
• invalid marker counts showing NaN

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Cypress integration
• Cypress component tests
• Jest unit tests

Manual verification:

• Wallet, planter, organization, and tree page navigation tested locally
• Reproduced and verified map init / bounds / partial-data error scenarios
• Verified keyword=undefined links are no longer generated
• Verified invalid marker counts now show 0

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules