release: 0.3.1

[webup]

What

• ship the latest web polish now living on develop as release/0.3.1
• simplify crowded settings/sidebar surfaces and tighten dashboard task-card actions
• make the update CTA effective by deep-linking into the update section and auto-running the version check

Why

• the current release branch does not include the recent UI cleanup and update-flow fixes
• the top update banner previously dropped users into Settings without actually loading update data

How

• branch release/0.3.1 from the current develop tip
• carry over the committed dashboard, settings, layout, and update-flow changes
• verify with vitest run src/modules/settings/__tests__/UpdateSection.test.tsx and npm run build

Screenshots

• UI changes were verified locally; add GitHub-hosted screenshots before final review if required by maintainers.