Extract shared fund Lucid components

Extract shared Lucid HTML components from Overview.hs and Invest.hs into Omni/Fund/Web/Components.hs, following the Omni/Task/Web/Components.hs pattern.

Components to extract

1. renderKpi — single KPI card with label, value, note, optional tooltip 2. renderKpiGrid — wraps children in .fund-kpi-grid div 3. renderSection — .fund-section-block with h2 title and description paragraph 4. renderSliderRow — labeled range input with value display span 5. renderDeltaRow — table row with asset, fund, target, actual, delta, action badge

Each component is a typed Lucid function. The types enforce correct usage (e.g., renderKpi takes a label Text, a value Html, an optional note Html).

Update consumers

• Overview.hs: replace inline KPI card HTML with renderKpi calls
• Invest.hs: replace inline section/KPI/slider HTML with component calls
• Verify visual output is identical via DevBrowser screenshots

Testing

Add Omni/Fund/Web/Components/Test.hs that renders each component with dummy data and asserts required CSS classes and HTML structure are present (using Lucid's renderText and Text.isInfixOf checks).

Acceptance criteria

• Components module compiles and exports all listed functions
• Overview.hs and Invest.hs use the shared components
• Component tests pass
• Visual output unchanged (DevBrowser verification)