Content Hub refresh and retry failed posts

New Features

• Redesigned Content Hub: The Content Hub now leads with a streamlined queue as the default view. Status is simplified to Scheduled, Published, and Failed, with counts on each chip. Origin and platform filters are grouped behind a single bar with a "More filters" disclosure for a cleaner layout.
• Retry failed posts: A "Retry now" button appears on any failed scheduled post so you can requeue it without rebuilding it from scratch. A warning reminds you to check the platform first, since a post can occasionally be marked failed after it has already gone out.
• Filters persist in the URL: Your status, platform, and origin filter choices are now saved in the URL. They survive a page reload and can be copied and shared with a teammate so they see exactly the same view.
• Email when credits are assigned: When someone assigns you a credit grant, you now receive an email notification in addition to the in-app alert, so you never miss it.

Improvements

• Cleaner workspace navigation: The Projects entry has been removed from the workspace sidebar, reducing clutter and making navigation more focused.

Bug Fixes

• Accurate long-form video credit estimates: Credit estimates for long videos were calculated per clip count instead of per billable second, causing quotes that were several times lower than actual cost. Estimates now reflect each format's planned duration correctly.
• Login form submits reliably: An edge case that caused the login form to silently fail on submit has been fixed.
• Long video completion status: The AI assistant now reports when a long video has finished generating accurately, instead of showing an in-progress status after the job has already completed.
• AI chat library images no longer break: Images in the AI chat library were served as direct storage URLs that expired after seven days. They are now routed through the same asset proxy used elsewhere, so replayed chat history and previously shared links keep loading correctly.
• Mobile homepage layout: Benefit cards on mobile now stack vertically instead of a horizontal snap carousel, and a black gap that appeared between sections on small screens is gone.