feat: add VoiceOver accessibility labels to icon-only buttons

Icon-only buttons exposed no usable text to VoiceOver, so they were
announced only as "Button" with no indication of their action. This
adds accessibilityLabel to every icon-only control across the app:

- Floating create button and the expandable action-menu toggle
- Repository star toggle (label reflects star/unstar state)
- File edit, comment edit, instance add/edit buttons
- Commit-history and open-in-browser toolbar buttons
- The markdown editor formatting toolbar (bold, italic, code, etc.)

No behavior or visual changes; labels are additive. Existing
accessibility identifiers are preserved.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Forji/Forji/Views/CommentView.swift

@@ -36,6 +36,7 @@ struct CommentView: View {
                             .foregroundStyle(.secondary)
                     }
                     .buttonStyle(.plain)
+                    .accessibilityLabel("Edit comment")
                 }
             }
 

Forji/Forji/Views/FileViewerView.swift

@@ -113,6 +113,7 @@ struct FileViewerView: View {
                     } label: {
                         Image(systemName: "pencil")
                     }
+                    .accessibilityLabel("Edit file")
                     .accessibilityIdentifier("file-edit-button")
                 }
             }

Forji/Forji/Views/FloatingButtons.swift

@@ -11,6 +11,7 @@ struct FloatingCreateButton: View {
                 .frame(width: 56, height: 56)
         }
         .glassEffect(.regular.tint(.blue).interactive())
+        .accessibilityLabel("Create")
         .padding(.trailing, 20)
         .padding(.bottom, 20)
     }
@@ -36,6 +37,7 @@ struct ExpandableActionMenu<Content: View>: View {
                     .frame(width: 40, height: 40)
             }
             .buttonStyle(.glass)
+            .accessibilityLabel("Actions")
             .accessibilityIdentifier("action-menu-toggle")
             .accessibilityValue(isExpanded ? "expanded" : "collapsed")
         }

Forji/Forji/Views/InstanceListView.swift

@@ -79,6 +79,7 @@ struct InstanceListView: View {
                     } label: {
                         Image(systemName: "plus")
                     }
+                    .accessibilityLabel("Add instance")
                     .accessibilityIdentifier("instance-add-button")
                 }
             }
@@ -129,6 +130,7 @@ struct InstanceListView: View {
                             .foregroundStyle(.secondary)
                     }
                     .buttonStyle(.plain)
+                    .accessibilityLabel("Edit instance")
                     .accessibilityIdentifier("instance-edit-button")
                 }
             }

Forji/Forji/Views/MarkdownComponents.swift

@@ -64,22 +64,23 @@ private struct MarkdownToolbar: View {
     var body: some View {
         ScrollView(.horizontal, showsIndicators: false) {
             HStack(spacing: 12) {
-                toolbarButton("bold", icon: "bold") { wrap("**") }
-                toolbarButton("italic", icon: "italic") { wrap("_") }
-                toolbarButton("heading", icon: "number") { prefix("# ") }
-                toolbarButton("code", icon: "chevron.left.forwardslash.chevron.right") { wrap("`") }
-                toolbarButton("codeblock", icon: "text.page") { wrapBlock("```") }
-                toolbarButton("link", icon: "link") { insertLink() }
-                toolbarButton("list", icon: "list.bullet") { prefix("- ") }
-                toolbarButton("quote", icon: "text.quote") { prefix("> ") }
-                toolbarButton("task", icon: "checklist") { prefix("- [ ] ") }
+                toolbarButton("bold", icon: "bold", label: "Bold") { wrap("**") }
+                toolbarButton("italic", icon: "italic", label: "Italic") { wrap("_") }
+                toolbarButton("heading", icon: "number", label: "Heading") { prefix("# ") }
+                toolbarButton("code", icon: "chevron.left.forwardslash.chevron.right",
+                              label: "Inline code") { wrap("`") }
+                toolbarButton("codeblock", icon: "text.page", label: "Code block") { wrapBlock("```") }
+                toolbarButton("link", icon: "link", label: "Insert link") { insertLink() }
+                toolbarButton("list", icon: "list.bullet", label: "Bulleted list") { prefix("- ") }
+                toolbarButton("quote", icon: "text.quote", label: "Quote") { prefix("> ") }
+                toolbarButton("task", icon: "checklist", label: "Task list") { prefix("- [ ] ") }
             }
             .padding(.horizontal, 8)
             .padding(.vertical, 6)
         }
     }
 
-    private func toolbarButton(_ id: String, icon: String, action: @escaping () -> Void) -> some View {
+    private func toolbarButton(_ id: String, icon: String, label: String, action: @escaping () -> Void) -> some View {
         Button(action: action) {
             Image(systemName: icon)
                 .font(.subheadline)
@@ -88,6 +89,7 @@ private struct MarkdownToolbar: View {
         }
         .buttonStyle(.plain)
         .foregroundStyle(.primary)
+        .accessibilityLabel(label)
         .accessibilityIdentifier("markdown-toolbar-\(id)")
     }
 

Forji/Forji/Views/RepositoryDetailView.swift

@@ -211,6 +211,7 @@ struct RepositoryDetailView: View {
                     } label: {
                         Image(systemName: "clock.arrow.circlepath")
                     }
+                    .accessibilityLabel("Commit history")
                     .accessibilityIdentifier("commits-button")
                 }
             }

Forji/Forji/Views/RepositoryListView.swift

@@ -280,6 +280,7 @@ struct RepositoryRow: View {
                 }
                 .buttonStyle(.borderless)
                 .disabled(isStarring)
+                .accessibilityLabel(isStarred ? "Unstar repository" : "Star repository")
                 .accessibilityIdentifier("star-button")
             }
 

Forji/Forji/Views/WorkflowRunDetailView.swift

@@ -48,6 +48,7 @@ struct WorkflowRunDetailView: View {
                     Link(destination: parsed) {
                         Image(systemName: "safari")
                     }
+                    .accessibilityLabel("Open in browser")
                     .accessibilityIdentifier("workflow-run-open-browser")
                 }
             }