Complete Tailwind migration for landing experience and shared form styles

[algobasket]

Motivation

• Finish a practical Bootstrap→Tailwind migration so the app’s public landing and common form UI look modern and professional.
• Remove visual/runtime dependencies on Bootstrap classes and JS while keeping form wrappers compatible with existing code.
• Improve developer ergonomics by making Simple Form defaults output Tailwind-friendly utilities so new views need minimal manual adjustments.

Description

• Rebuilt the landing page (app/views/welcome/index.html.slim) with a Tailwind-first hero, improved hierarchy, and clear CTAs for authenticated and anonymous users.
• Converted shared UI partials (app/views/shared/_alert.html.slim, app/views/shared/_footer.html.slim) to Tailwind utility classes and replaced Bootstrap dismiss semantics with simple DOM removal controls.
• Injected Tailwind CDN (https://cdn.tailwindcss.com) into main layouts (application, landing, admin, api_v2, funds) and removed Bootstrap asset imports and JS requires from several manifests/stylesheets (app/assets/javascripts/*, app/assets/stylesheets/*, admin.css.scss, application.css.scss, market.css.scss, api_v2.css.scss).
• Migrated Simple Form configuration to Tailwind-friendly defaults and updated legacy wrappers (config/initializers/simple_form.rb, config/initializers/simple_form_bootstrap.rb) to emit utility classes and a space-y-5 form default while retaining compatibility wrapper names.
• Added automated dependency maintenance metadata and docs updates: README.md note about Tailwind + Dependabot config (.github/dependabot.yml) and a Dependency Review workflow (.github/workflows/dependency-review.yml).

Testing

• Ran a targeted search for Bootstrap-era classes with rg to confirm removed usage in the touched files and found no remaining references in those files (search passed).
• Verified Ruby syntax for changed initializers with ruby -c config/initializers/simple_form.rb and ruby -c config/initializers/simple_form_bootstrap.rb (both returned Syntax OK).
• Attempted to start the app with bundle exec rails server -p 3000, which failed due to missing bundled executables (bundler environment lacks installed gems), so runtime verification could not complete.
• Attempted a Playwright screenshot of the landing at http://127.0.0.1:3000, which failed with net::ERR_EMPTY_RESPONSE because the Rails server was not running in this environment.

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[chatgpt-codex-connector]

Re-add bootstrap-switch to market asset bundle

Removing #= require bootstrap-switch.min from the market manifest breaks page initialization because market code still calls bootstrapSwitch in both app/assets/javascripts/lib/notifier.js.coffee (constructor) and app/assets/javascripts/component_ui/header.js.coffee (@after 'initialize'). Since new Notifier() runs immediately in market.js.coffee, market pages now raise $(...).bootstrapSwitch is not a function and stop attaching core trading components.

Useful? React with 👍 / 👎.

[chatgpt-codex-connector]

Restore wysihtml5 plugin include for admin document forms

The admin documents form still initializes a rich-text editor via $(elem).wysihtml5(...) in app/views/admin/documents/_form.html.slim, but this manifest change removed //= require bootstrap-wysihtml5/b3, so the jQuery plugin is no longer registered. On document create/edit pages this causes $(...).wysihtml5 is not a function, leaving the form with a runtime error instead of the expected editor.

Useful? React with 👍 / 👎.