feat: badge print — two-line name toggle + leading-none tightening + calibration SVG

- Add name_two_lines toggle (default: true) — uses CSS horizontal padding scaled by
  character count to coax short names (e.g. "Scott Idem") into a natural two-line wrap
  without a hard <br>; three tiers: ≤12 chars (18%), ≤20 (8%), ≤28 (2%), >28 no pad
- Inner <div> (block element) used inside Element_fit_text for class: directives —
  Svelte scoped CSS requires static class names in the template; dynamic strings and
  class: on component elements both fail to match scoped CSS rules
- Add leading-none to all four Element_fit_text fields (name, title, affiliations,
  location) — line-height must be set at the wrapper div level where fit_text measures
  scrollHeight, otherwise the binary-search scaler returns inflated sizes
- name_two_lines state persisted to localStorage (ae_badge_print_tweaks key) alongside
  existing print_offset, hide_chrome, and banner_full_width tweaks
- Rewrite badge_header_calibration.svg as a precise SVG ruler with labeled tick marks
  (major at 1in intervals, minor at 0.25in) for accurate physical print calibration
- Gate debug outline CSS on html.debug_outlines class (set by controls panel) so
  outlines never appear in normal print mode

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

static/ae-print-badge.css

@@ -107,9 +107,10 @@
         outline: 3px dashed purple !important;
         outline-offset: -12px !important;
     }
-    /* Cyan = the actual badge — should be dead-center on page */
+    /* Red = the actual badge — should be dead-center on page.
+       Thick + high-contrast so misalignment vs. physical card stock is obvious. */
     html.debug_outlines .event_badge_wrapper {
-        outline: 3px solid cyan !important;
-        outline-offset: 2px !important;
+        outline: 6px solid red !important;
+        outline-offset: 3px !important;
     }
 }