schedule imbalance fix convert locales to dropdown

[Saksham-Sirohi]

Fixes #386 as a high number of locales was the major cause of the breakdown, and it has been converted to a dropdown approach also some changes to flex have been made to keep it from breaking

Summary by Sourcery

Prevent header layout issues with many locales by converting locale links into a dropdown and tightening flex container settings.

Bug Fixes:

• Fix header breakdown when displaying a large number of locales by switching to a dropdown menu

Enhancements:

• Enforce nowrap and disable shrinking on header flex containers to prevent wrapping glitches
• Transform inline locale links into a
  dropdown with summary and styled items
• Introduce a dropdown.js script to close open dropdowns on outside clicks

[sourcery-ai]

Reviewer's Guide

Refactors the locale switcher into a

-based dropdown with new JS for outside-click handling, and updates layout.css to enforce nowrap flex layouts and style the dropdown menu.

Sequence diagram for locale dropdown interaction and outside click handling

sequenceDiagram
    actor User
    participant Header as Header (HTML)
    participant Dropdown as Dropdown JS
    participant System as Server
    User->>Header: Clicks on locale dropdown
    Header->>Dropdown: Dropdown opens
    User->>Dropdown: Clicks outside dropdown
    Dropdown->>Header: Dropdown closes
    User->>Header: Selects a locale
    Header->>System: Navigates to locale set URL
    System-->>User: Page reloads with new locale

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Class diagram for updated locale dropdown structure

classDiagram
    class Header {
        +locales : DetailsDropdown
    }
    class DetailsDropdown {
        +summary : string
        +dropdownContent : DropdownContent
    }
    class DropdownContent {
        +dropdownItem : list<DropdownItem>
    }
    class DropdownItem {
        +href : string
        +active : bool
        +name : string
    }
    Header --> DetailsDropdown
    DetailsDropdown --> DropdownContent
    DropdownContent --> DropdownItem

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Class diagram for dropdown.js outside click handler

classDiagram
    class DropdownJS {
        +initDropdowns()
        +handleClickOutside(event)
    }
    DropdownJS : Listens for document click
    DropdownJS : Closes open dropdowns if click is outside

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File-Level Changes

Change	Details	Files
Convert locale links into a native dropdown component	Replace inline list of locale links with / structure Wrap options in a dropdown-content div with dropdown-item classes Include new dropdown.js to handle closing on outside clicks	src/pretalx/common/templates/common/base.html src/pretalx/static/common/js/dropdown.js
Update layout.css to prevent header flex wrap issues and style dropdown	Change flex-wrap to nowrap and add flex-shrink: 0 on header containers Add summary { cursor: pointer } and dropdown-content positioning/border rules Define dropdown-item hover and active state styles	src/pretalx/static/cfp/css/_layout.css

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#386	Fix the imbalance in the navigation bar in the schedule view when the schedule grid is narrow (e.g., 2 columns), as shown in the provided screenshot.	✅
#386	Refactor the locale selection in the navigation bar from a horizontal list of links to a dropdown to prevent layout breakage when there are many locales.	✅

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[sourcery-ai]

Hey @Saksham-Sirohi - I've reviewed your changes - here's some feedback:

• Enhance accessibility by toggling aria-expanded on the
  element and adding a keydown handler (e.g. Escape) to close the dropdown for keyboard users.
• Consider including a small polyfill or fallback for details/summary so the locale dropdown still works in browsers that don’t fully support those elements.

Prompt for AI Agents

Please address the comments from this code review:
## Overall Comments
- Enhance accessibility by toggling aria-expanded on the <summary> element and adding a keydown handler (e.g. Escape) to close the dropdown for keyboard users.
- Consider including a small polyfill or fallback for details/summary so the locale dropdown still works in browsers that don’t fully support those elements.

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[mariobehling]

Please share a screenshot.

[Saksham-Sirohi]

@mariobehling Please see attached

2025-08-06.19-40-24.mov

[Saksham-Sirohi]

@mariobehling functionality has been updated to only use the dropdown when the number of available locales exceeds 3. Also, wrapping seemed to be breaking words have administered a fix for this

[mariobehling]

Thanks. We are moving to enext. Please make the update there. Thanks!