fix(feeds): apply optimistic account votes to feed vote counts

[tomcasaburi]

Summary

• useFeed now selects the active account's accountsVotes entry and applies it to feed, bufferedFeed, and updatedFeed via addOptimisticVoteCountsToComments, the same helper and selector pattern already used by useComments and useReplies.
• Voting on a post from a feed updates its upvoteCount/downvoteCount immediately instead of waiting for the community to publish new counts, so feed scores match comment pages.
• Adds a feeds.test.ts regression test that sets a pending account vote and asserts the feed count changes; README and generated llms files updated.

Verification

• oxfmt --check on the changed source files
• Vitest src/hooks/feeds/feeds.test.ts (61 tests pass)
• yarn build

Closes #113

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Note

Low Risk
Localized UI-layer normalization in useFeed reusing an existing helper; no auth, publishing, or protocol changes.

Overview
useFeed now mirrors comment/reply hooks for vote scores. It reads the active account’s pending votes from the accounts store and runs addOptimisticVoteCountsToComments on feed, bufferedFeed, and updatedFeed (after moderation normalization), so upvoting from a feed bumps counts immediately instead of waiting for canonical community data.

A regression test in feeds.test.ts asserts that a pending account vote increases upvoteCount on a feed item. Docs (README.md, llms-full.txt) now list useFeed alongside the other hooks that apply optimistic vote adjustments.

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📥 Commits

Reviewing files that changed from the base of the PR and between 036c44f and 0c678d0.

📒 Files selected for processing (4)

• README.md
• llms-full.txt
• src/hooks/feeds/feeds.test.ts
• src/hooks/feeds/feeds.ts

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