migrate CRA to Next.js 16 + React 19 + TypeScript + Tailwind v4

- replace CRA scaffold with Next.js static export config
- add app router pages: home, homelab, archive
- add components: Nav, Footer, Hero, Skills, ProjectCard, ThemeScript
- add ThemeContext for dark mode with FOUC prevention
- add data layer: projects.ts, services.ts
- update .gitignore for Next.js (ignore .next/, out/, next-env.d.ts)
- add docs: handoff plan, homelab decisions, style reference

docs/style-reference.md

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+Design this UI in the style of a modern developer-focused changelog/content feed. Use the following style principles:
+Layout & Structure
+Use a single-column, left-aligned content feed with generous vertical whitespace between entries. Group items under clear date/month headers that act as visual anchors. Keep the overall page width constrained (max ~800–900px) and centered, so the content feels focused and readable rather than sprawling.
+Typography
+Use a clean sans-serif system font stack. Headings should be bold and concise — favor short, scannable titles over long descriptive ones. Date labels and category tags should be small, muted, and secondary. Use size contrast (not just weight) to establish hierarchy: large section headers → medium entry titles → small metadata.
+Color & Theme
+Support both light and dark modes natively. Use a near-black/off-white background with high-contrast body text. Accent colors should be minimal and purposeful — one primary action color (e.g., a muted blue or purple) for links and interactive elements. Avoid decorative gradients; let whitespace and typography do the visual work.
+Entry/Card Pattern
+Each entry is a flat, borderless row — no card shadows or heavy containers. Include: a date label (left-aligned, muted), an entry type badge (e.g., "Release", "Improvement", "Retired") as a small pill/tag with a corresponding icon, a bold clickable title, and one or more category filter tags rendered as small inline chips with subtle background tints.
+Tags & Filtering
+Render category tags as small rounded pill buttons with very low-contrast background fills (e.g., light gray or transparent with a border). On a filter/sidebar, use checkboxes or toggle-style selectors. Show an active filter count as a badge. Include a visible "Clear all" affordance.
+Navigation & Header
+Minimal top navigation bar: site logo/name on the left, a small set of text links in the center or right, and one prominent CTA button (e.g., "Try X"). The header should be sticky or at minimum feel anchored. Below the page title, include secondary utility links (RSS, social follow) at small size.
+Interaction & Hover States
+Links and entry titles should have subtle underline-on-hover behavior. Tags/chips should lighten or highlight on hover. No heavy animations — transitions should be under 150ms and feel instantaneous.
+Footer
+Multi-column link footer with section headings (Product, Platform, Support, Company). Use small, muted text. Social icons should be monochrome and sized consistently. Include legal links (Terms, Privacy) as inline text at the very bottom.
+Spacing System
+Use an 8px base grid. Section gaps should be 48–64px. Entry gaps should be 24–32px. Tag/chip padding: 4px vertical, 10px horizontal. Comfortable line-height (1.5–1.6) throughout.