chore: release 0.9.1

[astyfx]

Summary

• Restore the Information panel's horizontal padding and darken the sidebar background so it reads as a distinct layer across themes.
• Fix Settings card double-padding, unify toggle-style controls into a shared chip group, and widen the Settings content column.
• Fix the status bar showing — for Claude/Codex usage (business-plan Codex credits mapping, CLAUDE_CONFIG_DIR-aware Claude keychain/credential lookup, more robust CLI /usage fallback parsing) and swap the bar order (usage left, memory right).

Verification

• bun run typecheck — clean
• bun test tests/custom-theme.test.ts tests/app-shell-mode.test.ts tests/settings-dialog-utils.test.ts tests/claude-usage-cli-fallback.test.ts — 45 pass, 0 fail

References

• fix(sidebar): restore info panel padding and darken sidebar background #124, fix(settings): tighten card padding, unify toggle chips, widen content #125, fix(status-bar): fix claude/codex usage detection and swap bar order #126

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