On latest `dev`, `ConfirmDialog` registers `handleKeyDown` on `window` and treats **every** Enter keypress as Confirm, calling `event.preventDefault()` first so the focused control never gets its native activation.
The dialog also activates a focus trap with no `initialFocus`, so focus-trap falls back to the first tabbable node, which is the **Cancel** button. So the dialog opens with Cancel focused, and pressing Enter runs Confirm.
This is the confirm surface for Delete chat, Delete folder, Delete model, Delete knowledge base and ~40 other call sites. A keyboard user who tabs to Cancel and presses Enter deletes the thing they were trying to keep. Screen reader users are hit hardest, since they cannot see which button they are on and the control that means "back out safely" performs the irreversible action instead.
Two related paths have the same cause: Enter in the `input=true` textarea submits instead of inserting a newline, and a markdown link inside `message` (reachable via `eventConfirmationMessage` from tool `__event_call__` payloads, and via `web_search_confirmation_content`) becomes the first tabbable node, so Enter on that link confirms instead of following it.
Breaks WCAG 3.2.2 On Input (Level A): changing the focused control changes what the Enter key does, and activating a control performs a different action than the one it is labelled with. Also 2.1.1 Keyboard (Level A), since Cancel has no working keyboard activation.
Fix: let the focused control act on Enter itself, and only fall back to Confirm otherwise. Uses the same `target instanceof Element && target.closest(...)` guard already used in `Functions.svelte`, `Knowledge.svelte`, `Models.svelte`, `Prompts.svelte`, `Skills.svelte` and `Tools.svelte`. `select` is deliberately not in the list, because a native `select` does not act on Enter and excluding it would silently break confirm for the `inputType === 'select'` variant. Two stray `console.log` calls in the same function are removed.
Behaviour after this change: Enter on Cancel cancels, Enter on Confirm confirms, Enter in the textarea inserts a newline, Enter on a link follows it, and Enter anywhere else still confirms as before.
Severity: Critical. Silent, unrecoverable data loss triggered by the most ordinary keyboard interaction there is.
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On latest `dev`, `common/Checkbox.svelte` renders a `<button type="button">` containing only `aria-hidden="true"` SVGs. It has no `role`, no `aria-checked` and no accessible name, and the component has no `$$restProps` spread, so a caller cannot supply a name either.
Assistive technology announces every one of these as an unnamed "button". A screen reader user cannot tell that the control is a checkbox, cannot tell whether it is on or off, and cannot tell what it toggles. The visible label is always an unassociated sibling element, for example `Capabilities.svelte` puts it in a preceding `<div>` with no `id`, and `Groups/Users.svelte` puts it in a different table cell from the checkbox.
Breaks WCAG 4.1.2 Name, Role, Value (Level A) on all three counts at once.
Fix: expose `role="checkbox"` and `aria-checked` on the control, add an `ariaLabel` prop, and pass the label text that is already in scope at each call site. `aria-checked` mirrors the component's existing icon logic exactly, so the indeterminate dash reports `mixed` rather than `false`. The `ariaLabel={ariaLabel || undefined}` shape matches the sibling `common/Switch.svelte`. Every label expression is the same one that renders the visible text next to the checkbox, so the accessible name always matches what is on screen.
Three call sites are deliberately left out of this PR, because they nest `Checkbox` inside another `<button>`, which is invalid HTML and independently broken:
- `workspace/Knowledge/KnowledgeBase.svelte` — the Checkbox's `on:change` sets `includeContent = true` and then the same click bubbles to the outer button, which flips it back with `includeContent = !includeContent`. Clicking the checkbox square is a no-op today, only the text label works. Giving it a confident name would advertise a control that does nothing.
- `workspace/common/MemberSelector.svelte` (two instances) — the inner Checkbox has no `on:change` at all and only works because its click bubbles to the row button. Naming it would create two focusable controls per row with the same name.
Both need the nesting resolved first, so that the row button carries the checkbox semantics. That is a behavioural fix and belongs in its own PR.
Severity: Serious. Affects model capabilities, default features, builtin tools, tool/filter/skill/action selectors and group membership.
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On latest `dev`, `RichTextInput` passes only `attributes: { id }` to tiptap, so the rendered contenteditable has an implicit `textbox` role and **no accessible name at all**.
The only label is the tiptap placeholder, which renders as CSS generated content in `src/app.css` via `content: attr(data-placeholder)`. Generated content never becomes an element's accessible name, so assistive technology announces the field as "edit text, blank".
This is the chat composer, the channel and thread composers, and the note editor, so it is the most used control in the product.
Breaks WCAG 4.1.2 Name, Role, Value (Level A), and 3.3.2 Labels or Instructions (Level A), since the only instruction is invisible to assistive technology.
Fix: expose the placeholder as `aria-label` on the editor element.
`attributes` is passed as a **function** rather than an object literal. The object form is evaluated once when the `Editor` is constructed and never rebuilt, but `placeholder` is deliberately runtime mutable: `channel/MessageInput.svelte` and `channel/Thread.svelte` swap it between "You do not have permission to send messages in this thread." and "Reply to thread..." once `channel` resolves, and it also changes when the interface language changes. With the object form the field would have been permanently named with whatever string happened to be set at mount, which for a channel the user *can* write to is the no-permission message. That would be worse than no name at all. ProseMirror supports the function form and re-evaluates it on every state update, and the component's existing `setPlaceholder` already dispatches an empty transaction, so the label now tracks the visible placeholder. It binds to `_placeholder`, the same value that feeds the visible text, so the two cannot diverge.
`aria-multiline` is deliberately not set. It is only valid on an explicit `textbox`/`searchbox` role, and adding `role="textbox"` would flatten the editor's inner structure so headings, lists and links inside rich text stop being exposed.
Severity: Critical. The application's primary input announces as an unnamed edit field.
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Add a custom MIME type (application/x-open-webui-drag) to intentional
chat and folder drag sources. The onDragOver handler in MessageInput
now checks for this type instead of the generic text/plain, which
SortableJS also sets during reorder operations for pinned menu items
(Notes, Workspace) and pinned Models.