chore: regenerate demos and refresh release archive

Render the four README demos against the cleaned templates and embed
kaku terminal screenshots in-repo so the deck is self-contained.

Demos
- 4 PDFs and PNGs regenerated with WeasyPrint 68; PNG previews exact
  1241x1754 (was off by 2 pixels before)
- demo-kaku now references in-repo assets/demos/images/kaku-hero.jpg
  and kaku-action.jpg; previous paths reached outside the repo and
  failed for any user without the sibling Kaku project checked out
- demo-tesla figure svg fills full content width while keeping 2 pages
  by tightening section spacing and reducing h2/h3 + analyst-box +
  callout margins; relabeled in README + 3 index pages from One-Pager
  to Equity Report (matches the actual content)
- demo-musk-resume metric labels trimmed to single line, AI-era
  timeline cell shortened to 2 lines, section margins loosened so
  page 1 reads less cramped while staying within 2 pages
- demo-agent-slides: metric row switched to vertical stack so big
  numbers align across columns regardless of label wrap; bulleted
  lists upgraded from en-dash to numbered "1./2./3." for cleaner
  reading at slide scale (print docs keep en-dash convention)

Release archive
- dist/kami.zip refreshed: 4.2MB / 83 files; spot-checked content
  matches working tree (production.md 22 pitfalls, resume.html @page
  margin 11mm, kaku-action.jpg packaged)

fix(slides): tighten WeasyPrint slide line heights

chore(dist): refresh kami.zip for V1.3.0

Update dist/kami.zip for V1.2.0 release

fix: reset body letter-spacing to 0 for English index, tighten sectio…

…n-title tracking

Remove sponsor banner from README