perf: aggressive webp re-compression + max-width 1920 resize

- recompress every webp at q=70-82 depending on size band
- resize anything wider than 1920px to 1920 max
- convert remaining png/jpg holdouts (mine, thermal, dex3-1 etc) to webp
- restore apple-touch-icon.png (iOS requires png)
- 86 files recompressed, saved 4.36 MB
- public/ images: 11.7 MB -> 6.69 MB (-43%)
- total trajectory: 23.3 MB -> 6.69 MB (-71%)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/app/globals.css

@@ -529,6 +529,21 @@ html {
 /* === Layout helpers === */
 .container-wide { max-width: 1320px; margin: 0 auto; padding-left: clamp(1rem, 4vw, 2rem); padding-right: clamp(1rem, 4vw, 2rem); }
 
+/* === Navbar responsive === */
+.nav-desktop { display: none; }
+.nav-desktop-cta { display: inline-flex; }
+.nav-mobile-toggle { display: none !important; }
+@media (min-width: 900px) {
+  .nav-desktop { display: flex !important; }
+  .nav-desktop-cta { display: inline-flex !important; }
+  .nav-mobile-toggle { display: none !important; }
+}
+@media (max-width: 899px) {
+  .nav-desktop { display: none !important; }
+  .nav-desktop-cta { display: none !important; }
+  .nav-mobile-toggle { display: inline-flex !important; }
+}
+
 .eyebrow {
   display: inline-flex;
   align-items: center;