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Three-pane email inbox composing a folder sidebar, thread list, and message reader with reply controls.
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Inbox Page assembles a complete three-pane email client from three sibling blocks. The inbox sidebar holds folder navigation and label counts so users switch context without leaving the view, the email list renders the thread index for the selected folder with sender and subject, and the email reader shows the open message with reply controls so the full read-and-respond workflow is visible at a glance.
No pane is hand-built. Each block is independently swappable: replace EmailReader with a collapsed thread view, drop in a compose blueprint beside the sidebar when the compose flow needs showcasing, or swap InboxSidebar for a label manager when the label editing surface is the primary need.
Reach for this page as the main email surface, wired to your messaging backend and the selected folder id from the sidebar. Wire the email list selection state to the reader to open the correct message.
A natural flow around it on an Application Pro page:
Before
After
One strong use is the workspace inbox with folder nav and message reader. Other configurations:
Tip: the three-pane layout works because each pane has a single job; keep the sidebar for navigation only and resist adding content filters to the reader column.