ui: minor updates in button icons, tooltips, and landing page#95

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huiwanpnnl wants to merge 2 commits intomasterfrom

ui_icons_and_tooltip

Commits on May 6, 2026

ui: revise 2 icons and 1 tooltip
huiwanpnnl
committed
ui: minor wording updates on landing page; add reminder of shortcut for file loading in main toolbar
huiwanpnnl
committed