Custom PDF layout (replace MPMB template)

[igor47]

Summary

• Replaces src/services/characterPdf.ts (MPMB template fill) with a self-contained pdf-lib renderer. We can't redistribute MPMB's sheets, so we own the layout end-to-end.
• Layout inspired by the WotC 2024 character sheet: top identity strip with stat tiles, vertical ability column on the left with notched tabs and explicit save row, sectioned right column for Weapons / Skills / Spellcasting / Features / Equipment.
• generateCharacterPdf(char, playerName?) and generateCampaignPdf(entries) keep the same signatures — no route changes needed.

What it looks like

Page 1 (always):

• Top strip: Identity block (name + background/class/species/subclass/alignment/size/player labeled lines), a 2×2 stats grid (Initiative / Speed / Passive Perception / Prof Bonus), and AC / HP (cur/max + temp write-in) / Hit Dice (per-die tiles, X'd if used).
• Left column: Six vertical ability cards. Each has a notched-tab label, the modifier as a big number with a score chip below, a horizontal divider, and a centered save row (filled disc = proficient).
• Right column: Weapons (wielded items only, write-in line for Atk bonus), Skills (single list, alphabetical, with ability tag), Spellcasting (per-class DC / Atk / Ability + slot tiles with X for used), Features & Traits (names only, 2 columns), Equipment (names + tags, 2 columns, coins line at bottom).

Page 2+ (only if needed): Wild Shape block for druids; per-class spells with cantrip / prepared / spellbook sections.

Tests

characterPdf.test.ts rewritten at the behavior level: PDF parses, page count in range, drawn text appears in decoded content streams. The helper inflates each `PDFRawStream` and decodes PDF hex string literals (`<54657374> Tj`) so ASCII text matches work.

MPMB assets

`assets/mpmb/*.pdf` is no longer referenced by any code path. Left on disk for the separate history-rewrite task.

Test plan

• `mise run check` passes (Biome + tsc)
• `mise run test` passes (689/689)
• Open the PDF route on a real character and confirm the new layout renders without obvious overlap or clipping
• Generate a campaign PDF with 3+ characters and confirm pages concatenate cleanly