Update tab-presence topics to include browser prefix and adjust condition checks

[cstns]

Description

align the pub/sub topics between the frontend/backend on tab presence

Related Issue(s)

n/a

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production
• Link to Changelog Entry PR, or note why one is not needed.

Labels

• Includes a DB migration? -> add the area:migration label

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 76.16%. Comparing base (4fe037c) to head (39bc354).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
forge/comms/commsClient.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8194   +/-   ##
=======================================
  Coverage   76.16%   76.16%           
=======================================
  Files         442      442           
  Lines       23694    23694           
  Branches     6306     6306           
=======================================
  Hits        18047    18047           
  Misses       5647     5647           

Flag	Coverage Δ
backend	76.16% <0.00%> (ø)

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[Steve-Mcl]

re-run on ui test needed