fix(load): respect tooltip-format config

[kylin-liwn]

What does this PR do?
The load module called label_.set_tooltip_markup() with a hardcoded format. It never called resolveTooltipFormat(), so the user's tooltip-format config was silently ignored.

Replace the direct call with setTooltipMarkup() paired with resolveTooltipFormat(). Use the configured format when present, fall back to the original default.

Related issues
Closes #5289

Checklist

• Code is formatted with clang-format
• Builds locally (ninja -C build)
• Man page updated for any new/changed user-facing option (man/)
• Tested against the affected module(s)

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge, with no actionable correctness, security, or repository-rule issues identified.

Summary

This PR updates the load module to honor configured tooltip formats while retaining its existing generated tooltip as the fallback.

• Resolves state-specific and general tooltip formats through the shared module helper.
• Formats configured tooltips using the load and icon argument store.
• Uses the deduplicating tooltip update path employed by other label modules.

_{Reviews (1) · Last reviewed commit: "fix(load): respect tooltip-format config"}