Support Context Copy Button

Added a new info icon button to the top navigation bar across all app sections (main, ADI, booster, change history, untracked). Clicking it copies the current page context to the clipboard — including company name, user, client, budget, and campaign (with IDs), plus the current URL. A popover shows the copied info with a "Copied!" confirmation. This lets customers paste full context directly into support requests, reducing back-and-forth during triage.