USR369: "put the breadcrumb in the quick links at the bottom on all of them, mark those done on the page inventory." Backed up all 5 pages in one BACKUP.php call first. Injected self-contained CSS (hardcoded colors matching STANDARDS-REG palette -- .cai-top/.cai-tp breadcrumb, .cai-bottom-tabs/.cai-btab quick links) since none of the 5 pages shared a common CSS variable scheme, so relying on var(--x) would have broken silently on pages that do not define those variables. Bottom-tabs link set identical across all 5: Tech Hub + all 5 sibling tools, current page marked .here. Updated page-inventory.html: 4 of 5 rows (177-180) moved to DONE. Row 181 (android-library.html) deliberately left at MAJOR, not moved to DONE -- the nav work is finished but the naming collision (T-ANDROID-LIBRARY-NAMING, still open with Tech[30]) is a separate, unresolved problem, and marking it DONE would overstate the page's actual state.