[P9-3] Story main page: Genesis + table of contents

[realproject7]

Current

/story/[storylineId] renders ALL plots inline on one page.

New layout (Wattpad-style)

Header: title, author, stats, deadline

Genesis: full content (plot index 0) — story overview/synopsis + comments

Table of Contents: list of chapters (plot index 1+)

• Each row: chapter number, title, truncated preview (~100 chars), date
• Click navigates to /story/[storylineId]/[plotIndex]
• Fallback for no title: "Chapter {N}"

Sidebar: keep existing (price curve, trading, donate, rating)

Acceptance Criteria

• Genesis displayed prominently at top
• TOC lists chapters with title + preview + date
• Each row links to plot detail page
• Handles 0 chapters (genesis only) and missing titles
• Mobile responsive 375px

Blocked by: #184 (contract), #185 (DB schema)

Part of: Phase 9 Epic (#183)