[feature/frontend] Respect prefers-reduced-motion for avatars, headers, and emojis (#3118)

* [feature/frontend] Respect `prefers-reduced-motion` for avatars, headers, and emojis

* go fmt

* fix tests

* use static version of instance thumbnail when appropriate

* use prefers-reduced-motion

* simplify account conversion a bit

* fix c&p error

internal/api/model/account.go

@@ -110,17 +110,27 @@ type Account struct {
 	// If set, indicates that this account is currently inactive, and has migrated to the given account.
 	// Key/value omitted for accounts that haven't moved, and for suspended accounts.
 	Moved *Account `json:"moved,omitempty"`
+}
 
-	// Additional fields not exposed via JSON
-	// (used only internally for templating etc).
+// WebAccount is like Account, but with
+// additional fields not exposed via JSON;
+// used only internally for templating etc.
+//
+// swagger:ignore
+type WebAccount struct {
+	*Account
 
 	// Proper attachment model for the avatar.
 	//
-	// Only set if this model was converted via
-	// AccountToWebAccount, AND this account had
-	// an avatar set (and not just the default
-	// "blank" avatar image.)
-	AvatarAttachment *Attachment `json:"-"`
+	// Only set if this account had an avatar set
+	// (and not just the default "blank" image.)
+	AvatarAttachment *WebAttachment `json:"-"`
+
+	// Proper attachment model for the header.
+	//
+	// Only set if this account had a header set
+	// (and not just the default "blank" image.)
+	HeaderAttachment *WebAttachment `json:"-"`
 }
 
 // MutedAccount extends Account with a field used only by the muted user list.

internal/api/model/attachment.go

@@ -107,6 +107,10 @@ type WebAttachment struct {
 	// MIME type of
 	// the attachment.
 	MIMEType string
+
+	// MIME type of
+	// the thumbnail.
+	PreviewMIMEType string
 }
 
 // MediaMeta models media metadata.

internal/api/model/instancev1.go

@@ -85,6 +85,12 @@ type InstanceV1 struct {
 	// MIME type of the instance thumbnail.
 	// example: image/png
 	ThumbnailType string `json:"thumbnail_type,omitempty"`
+	// URL of the static instance avatar/banner image.
+	// example: https://example.org/files/instance/static/thumbnail.webp
+	ThumbnailStatic string `json:"thumbnail_static,omitempty"`
+	// MIME type of the static instance thumbnail.
+	// example: image/webp
+	ThumbnailStaticType string `json:"thumbnail_static_type,omitempty"`
 	// Description of the instance thumbnail.
 	// example: picture of a cute lil' friendly sloth
 	ThumbnailDescription string `json:"thumbnail_description,omitempty"`

internal/api/model/instancev2.go

@@ -102,6 +102,13 @@ type InstanceV2Thumbnail struct {
 	// Key/value not set if thumbnail image type unknown.
 	// example: image/png
 	Type string `json:"thumbnail_type,omitempty"`
+	// StaticURL version of the thumbnail image.
+	// example: https://example.org/fileserver/01BPSX2MKCRVMD4YN4D71G9CP5/attachment/static/01H88X0KQ2DFYYDSWYP93VDJZA.webp
+	StaticURL string `json:"static_url,omitempty"`
+	// MIME type of the instance thumbnail.
+	// Key/value not set if thumbnail image type unknown.
+	// example: image/png
+	StaticType string `json:"thumbnail_static_type,omitempty"`
 	// Description of the instance thumbnail.
 	// Key/value not set if no description available.
 	// example: picture of a cute lil' friendly sloth

internal/api/model/status.go

@@ -113,6 +113,9 @@ type Status struct {
 type WebStatus struct {
 	*Status
 
+	// Override API account with web account.
+	Account *WebAccount `json:"account"`
+
 	// Web version of media
 	// attached to this status.
 	MediaAttachments []*WebAttachment `json:"media_attachments"`