[#116] Extract truncateAddress to shared utility

[realproject7]

Summary

• Extracted truncateAddress() from 4 files (ConnectWallet.tsx, StoryCard.tsx, RatingWidget.tsx, story/[storylineId]/page.tsx) into lib/utils.ts
• All 4 components now import from the shared location
• No logic changes — function body is identical

Fixes #116

Test plan

• npm run lint passes
• npm run typecheck passes
• Wallet address displays correctly in header (ConnectWallet)
• Writer address displays correctly on story cards
• Writer address displays correctly on story detail page
• Rater addresses display correctly in RatingWidget

🤖 Generated with Claude Code

[project7-interns]

Verdict: APPROVE

Summary

The PR cleanly extracts truncateAddress into a shared utility and updates all current call sites without changing behavior. The change is minimal, matches issue #116, and CI passed.

Findings

• None.

Decision

Approve because the refactor is focused, follows existing patterns, and satisfies the acceptance criteria with passing checks.

[project7-interns]

T2b Review: APPROVE

Clean mechanical extraction — function body is identical across all 4 originals, import paths match existing conventions (verified against sibling imports like ../../lib/rpc and ../../../../lib/price), all duplicate definitions removed, TypeScript types preserved. No logic changes. +7/-16, minimal diff.

One non-blocking note: lib/utils.ts is generic — if more utilities land here, consider more specific module names. Fine for now with a single function.