Fix README setup instructions

Add specs for controllers and models, write README, remove dead tasks#show code

Fix local_assigns in task form, authorize projects#new, remove unused task show route

Refactor controllers and views: before_action, task form partial, transaction in update, minor fixes

Refactor views and controllers: extract partials, move task grouping to model

Add project edit/update/destroy, refactor new form to use @project

Replace 404 page with localized ERB, fix flash alert styling, remove search autofocus

Fix routing, associations, form state preservation after validation errors

Add Pundit authorization and refactor controllers

Replace jQuery search effects with CSS transitions, remove jQuery dependency

Extract floating_field partial, replace mt-* spacing with gap-5, custom field_error_proc

Add devise-i18n, set locale to ru, refactor auth label animation

Refactor UI layout, add cascade deletes, tighten DB constraints

Migrate styles to Tailwind CSS, fix Ruby shebangs for WSL

Remove footer, integrate jQuery via importmap, fix Turbo compatibility, update database config

Clean up JS animation and fix relay error detection

Fix README link

Add README

Fix network errors, timeouts, and auth flow edge cases

Fix routing, auth flow, and asset paths