feat: terminal-noir redesign — widget system + design token overhaul

Replace cyan-green modern theme with terminal-noir aesthetic aligned to
style-guide.md. Hard edges, monospace-first, linear transitions, no gradients.

Introduce Widget component as the single repeatable section primitive:
title bar with horizontal rule, optional badge/meta — all pages and
sections now use this pattern (Glance-inspired data-driven layout).

Design system changes (globals.css):
- Palette: #0a0a0a bg, #111111 surface, #00cc44 status green, #cc2200 alert red
- Drop Montserrat; Source Code Pro primary, system sans for prose only
- Transitions: linear 120ms; no eased animations, no border-radius

Component changes:
- Nav: flat, border-bottom only, lowercase links
- Hero: 56px square photo, status dot, @ email glyph
- ProjectCard: flat bordered card, 2-col grid, no gradient tile
- Skills: key-value rows with dot-separated values
- Footer: minimal text links

Pages: all sections wrapped in Widget; homelab uses gap-px grid for
at-a-glance, services, and ADRs sections. Archive uses flat list layout.

Data: remove gradient field from Project type; add optional year field

src/app/page.tsx

@@ -2,10 +2,11 @@ import type { Metadata } from "next";
 import Hero from "@/components/Hero";
 import Skills from "@/components/Skills";
 import ProjectCard from "@/components/ProjectCard";
+import Widget from "@/components/Widget";
 import { featuredProjects } from "@/data/projects";
 
 export const metadata: Metadata = {
-  title: "Tyler Koenig | Portfolio",
+  title: "Tyler Koenig",
   description:
     "SOC Helpdesk I by day, building beyond the title. Projects in AI tooling, mobile apps, infrastructure, and more.",
 };
@@ -15,18 +16,13 @@ export default function Home() {
     <>
       <Hero />
       <Skills />
-
-      <section aria-labelledby="projects-heading">
-        <h2
-          id="projects-heading"
-          className="font-mono text-xs text-[var(--color-green)] tracking-widest uppercase mb-10"
-        >
-          Projects
-        </h2>
-        {featuredProjects.map((project, i) => (
-          <ProjectCard key={project.slug} project={project} reversed={i % 2 !== 0} />
-        ))}
-      </section>
+      <Widget title="projects" badge={featuredProjects.length}>
+        <div className="grid grid-cols-1 sm:grid-cols-2 gap-3">
+          {featuredProjects.map((project) => (
+            <ProjectCard key={project.slug} project={project} />
+          ))}
+        </div>
+      </Widget>
     </>
   );
 }