Update flake inputs, drop stale version pins

[srid]

Bumps all flake inputs to latest and removes outdated Haskell package version pins that are now in nixpkgs.

Specifically: nixpkgs jumps ~9 months (Jul 2025 → Apr 2026), flake-parts and haskell-flake are updated, and the pinned fsnotify 0.4.1.0 / ghcid 0.8.8 sources are dropped since nixpkgs now ships 0.4.4.0 and 0.8.9 respectively. The tailwind Haskell package needed an extraBuildDepends for the tailwindcss CLI binary, which is no longer wired in by default. Fourmolu formatting was re-applied across the codebase to match the updated toolchain.

Try it locally

nix build github:srid/emanote/update-flake-inputs

[srid]

/do results

Step	Status	Duration	Verification
sync	✓	3s	git fetch succeeded
research	✓	14s	Task understood
hickey	✓	8s	No findings
branch	✓	19s	PR #629 created
implement	✓	~5m 32s	flake update + pin removal + tailwind fix + formatting
docs	✓ (skip)	0s	No docs to update
police	✓ (skip)	0s	No code logic changes
fmt	✓	~1m 30s	fourmolu applied
commit	✓	40s	4 commits pushed
test	✓ (skip)	0s	CI covers tests
ci	✓	2m 43s	5 packages built
update-pr	✓	17s	PR updated
Total		~10m 12s

Optimization suggestions

• CI dominated at ~2m 43s — for re-runs after small fixes, use --from ci-only
• Formatting iteration took 2 CI cycles because nixpkgs fourmolu didn't match project config — pre-formatting with the project's fourmolu.yaml settings before first CI attempt would save ~3 minutes
• tailwind build failure was a new breakage in updated nixpkgs — checking nix build locally on the main package before pushing would catch this earlier
• Consider pinning fourmolu version in the project to avoid formatting churn on updates

Workflow completed at 2026-04-07T00:13:10Z.