* refactor(web): drop dead taskPRs loading state and unused removeTaskPR
The taskPRs.loaded/loading fields were written but never read — useWorkspacePRs
uses its own fetchedRef for fetch-once gating instead. removeTaskPR was defined
but never called. Removing all three avoids a footgun in multi-repo tasks where
removeTaskPR would have wiped every repo's PR state at once.
* refactor(web): use plain deepMerge for taskPRs hydration
taskPRs no longer carries loading/loaded fields, so the mergeWithLoading helper has nothing to preserve. Switching to deepMerge makes the intent explicit.
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Co-authored-by: Kandev Agent <agent@kandev.dev>
João Salavisa
e9a7869463