chore(deps): pin urllib3>=2.7.0 to clear CVE-2026-44431 / CVE-2026-44432

urllib3 2.6.3 was being pulled in transitively (none of our top-level
  deps require >=2.7.0 yet) and trips two recent CVEs. Direct pin in
  requirements.txt forces the resolver to install 2.7.0, which is the
  upstream-fixed release for both findings.

CHANGELOG.md

@@ -160,6 +160,8 @@ All notable changes to Bambuddy will be documented in this file.
 - **Label picker modal clipped the 4th template option and Cancel button on short viewports** ([#1230](https://github.com/maziggy/bambuddy/issues/1230), reported by @elit3ge) — Clicking "Print labels" from Inventory opened the picker with only 3 of the 4 templates visible (Avery 5160 was half-cut at the bottom) and no Cancel button reachable, with no way to scroll to them. Surfaced reliably on Windows 11 + Brave at 1080p with browser chrome / DPI scaling shrinking the effective viewport, but the layout bug hits anywhere the modal's `max-h-[90vh]` lands below ~770 px. **Cause:** `LabelTemplatePickerModal.tsx` uses a flex column with `overflow-hidden` on the outer modal, the spool list as the `flex-1` shrinkable child, and the templates section + footer as fixed siblings below it. The spool list had `min-h-[160px]`, which combined with the default `min-height: auto` for flex items meant the spool list couldn't yield space when the modal was tight — the templates and footer overflowed the modal's bottom edge and got clipped. **First fix (insufficient):** `min-h-[160px]` → `min-h-0` on the spool list scroller, which both removes the fixed floor and overrides the implicit `min-height: auto`. That made the spool list shrink, but on the user's 838 px viewport with browser chrome eating into 90 vh the four stacked templates (~310 px) plus footer still didn't fit, leaving Avery 5160 half-cut and the Cancel button below the modal's clipped bottom edge — `elit3ge` confirmed the dev build was still broken after that fix. **Second fix:** the templates section now renders as a responsive grid (`grid-cols-1 sm:grid-cols-2 gap-2`) so the four buttons pack into a 2×2 grid above the `sm` breakpoint, trimming ~150 px of vertical inside the modal. Each cell tightens its label/hint to `text-sm` + `truncate` (with the full strings reachable via the new `title=label — hint` on the button so the truncation never hides information), padding shrinks to `p-2.5`, and the footer's `py-3` is dropped to `py-2` for a few extra pixels. The earlier `min-h-0` on the spool list is kept as a belt-and-braces shrink for any viewport tighter still. Pre-existing on `dev` since 0.2.4b2 (commit `864e5c99`, the original PR #809 that introduced the modal); not a regression from the spoolman-inventory rebase. **Test:** the regression test in `LabelTemplatePickerModal.test.tsx` is upgraded to pin the new structural shape — the templates container has `grid` + `grid-cols-1` + `sm:grid-cols-2` and exactly 4 child buttons, plus the existing assertions that all 4 template names + the Cancel button render and the spool list scroller still has `min-h-0` with no fixed `min-h-[…]` literal. So a future refactor that drops the grid and reintroduces stacked rows fails CI.
 
 ### Security
+- **urllib3 floor raised to 2.7.0 to clear CVE-2026-44431 and CVE-2026-44432** — `urllib3` is a transitive dependency (none of Bambuddy's top-level deps require `>=2.7.0` yet), so the resolver was silently keeping the vulnerable `2.6.x` line. `requirements.txt` now carries an explicit `urllib3>=2.7.0` pin under the HTTP-client section with an inline comment explaining the indirect-dep rationale, so a future `pip install -r requirements.txt` rebuild picks up the upstream-fixed release. No Bambuddy code change — the affected code paths live inside urllib3 itself.
+
 - **python-multipart bumped to 0.0.27 to clear CVE-2026-42561** — `requirements.txt` floor raised from `>=0.0.26` to `>=0.0.27`. python-multipart is the multipart/form-data parser FastAPI uses for `UploadFile` body parsing, so it sits on every Bambuddy upload path (3MF/STEP/STL upload, label-template imports, OIDC certificate upload, backup restore, etc.). The advisory is a parser-side issue against malformed multipart input; Bambuddy doesn't expose unauthenticated upload endpoints (every multipart route is gated on either `Permission.LIBRARY_UPLOAD` / `SETTINGS_UPDATE` / `INVENTORY_UPDATE`), so blast radius is bounded to authenticated callers — but the bump is mechanical and the floor was already loose, so no reason to wait.
 
 ## [0.2.4b2] - 2026-05-05

requirements.txt

@@ -61,6 +61,12 @@ pyotp>=2.9.0
 # HTTP client (used for OIDC token exchange)
 httpx>=0.26.0
 
+# Transitive pin: urllib3 2.6.3 has CVE-2026-44431 and CVE-2026-44432;
+# 2.7.0+ is the fixed release. Direct pin here because none of our
+# top-level deps require >=2.7.0 yet, so without this the resolver
+# would silently keep installing the vulnerable 2.6.x line.
+urllib3>=2.7.0
+
 # Plate Detection (optional - enables build plate empty detection)
 opencv-python-headless>=4.8.0
 numpy>=1.24.0