docs(web-ui): update C0R3/L0GS/BU1LDS page docs to reflect build queue move

R3BU1LD QU3U3 and M3T4 1NPUTS moved from /core.html to /builds.html
(the BU1LDS page); the BUILD log tab moved from /logs.html to /builds.html.
dashboard.md still described the old 4-tab C0R3 page and 4-tab L0GS page.

Changes:
- C0R3 page section: update to the actual 2 tabs (K3PT ST4T3 +
  C0NT41N3R L04D); add pointer to BU1LDS page
- Add new BU1LDS page section: R3BU1LD QU3U3 (with all 9 queue kind
  glyphs + deferred-start parent_id note), M3T4 1NPUTS, BUILD L0GS
- L0GS page section: update to actual 3 tabs (AGENT / SYSTEM / AUDIT);
  remove BUILD sub-tab prose; add pointer to BU1LDS page
- Fix two stale 'C0R3 page R3BU1LD QU3U3' refs to 'BU1LDS page'
- web-ui.md index: mention BU1LDS alongside C0R3 and L0GS

docs/web-ui.md

@@ -13,8 +13,9 @@ This doc has been split for readability. Pick the section you need:
   per-agent relative paths, `data-async` form pattern, side panel,
   atomic repaint.
 - **[Dashboard layout](web-ui/dashboard.md)** — tab contents
-  (SW4RM, Y3R C4LL, P3RM1SS10NS, SCH3DUL3S) + the standalone C0R3 page
-  (`/core.html` — the old SYST3M panels), container row,
+  (SW4RM, Y3R C4LL, P3RM1SS10NS, SCH3DUL3S) + standalone pages
+  (C0R3 `/core.html`, BU1LDS `/builds.html`, L0GS `/logs.html`,
+  M4TR1X ACC0UNTS `/matrix-accounts.html`), container row,
   topology tree, selection bar, approval card, browser
   notifications, dashboard endpoints + event channel.
 - **[Per-agent page](web-ui/agent.md)** — header, main terminal,