docs: add v1.0.0 changelog

Author: phatpham9

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project are documented in this file.
+
+## v1.0.0 - 2026-06-21
+
+Initial public release of `feedreader`.
+
+### Added
+
+- Initial `feedreader` application with combined feed aggregation and self-hosted Go service runtime.
+- Incremental backend loading for feed items.
+- Feed search across items.
+- Configurable source selection in the UI.
+- Source icons across the feed experience.
+- alphaXiv as a feed source.
+- Toast-based loading states.
+- Offline PWA cache and reconnect toasts.
+- Offline connection indicator.
+- Reader settings dialog.
+- Browser-localized feed card dates.
+- GitHub Actions CI for formatting and tests.
+- GitHub Actions CD for multi-arch GHCR image publishing on release tags.
+
+### Changed
+
+- Rewrote the README for the open source release.
+- Switched the Hugging Face integration to trending papers.
+- Enriched feed cards with source-specific metrics.
+- Rebranded the app UI and icons around the `feedreader` identity.
+- Moved source settings access into the header.
+- Updated local development and test instructions.
+- Parameterized the Docker build for `linux/amd64` and `linux/arm64` image publishing.
+
+### Fixed
+
+- Refreshed app icons and footer branding.
+- Preserved explicit alphaXiv source selection.
+- Preserved stable feed ordering timestamps.
+- Persisted visited links and refreshed the list in place.
+- Brightened GitHub icons in dark mode.
+- Simplified filter loading and search close behavior.
+- Improved iOS search open and empty close behavior.
+- Normalized GitHub repository identity handling.
+- Applied density settings correctly in the settings dialog.
+- Centered settings choice cards in compact mode.
+- Busted stylesheet cache for settings alignment fixes.