test(kanban-dashboard): pin assignee-casing static-asset regressions + AUTHOR_MAP

Follow-up to the previous commit's casing fix.

The original PR shipped the dist edits without test coverage. The
contributor's reasoning (UI-only attributes in a pre-built JS bundle,
nothing meaningful to unit-test) is fair, but a static-asset assertion
catches the most likely regression vector — a future rebuild of the
dist bundle that loses the attributes — at near-zero cost.

Adds two regression tests in tests/plugins/test_kanban_dashboard_plugin.py:

- test_dashboard_assignee_inputs_preserve_casing — reads dist/index.js
  and asserts autoCapitalize="none", autoCorrect="off", spellCheck=false,
  and textTransform="none" each appear at least twice (one per assignee
  input — inline triage/lane create + task-edit panel).
- test_dashboard_lane_head_preserves_assignee_casing — reads dist/style.css
  and asserts the .hermes-kanban-lane-head rule body does NOT contain
  text-transform: uppercase. Locates the rule by marker so unrelated CSS
  churn nearby doesn't flake the test.

Both follow the same shape as the existing test_dashboard_requests_default_board_explicitly
static-asset guard from PR #22940's salvage.

Also adds the AUTHOR_MAP entry for princepal9120's GitHub-noreply email
so release notes credit the right account.

scripts/release.py

@@ -713,6 +713,7 @@ AUTHOR_MAP = {
     "ty@tmrtn.com": "tymrtn",
     "elitovsky@zenproject.net": "kallidean",
     "5463986+baocin@users.noreply.github.com": "baocin",
+    "107296821+princepal9120@users.noreply.github.com": "princepal9120",
     "23434080+sicnuyudidi@users.noreply.github.com": "sicnuyudidi",
     "haimu0x0@proton.me": "haimu0x",
     "abdelmajidnidnasser1@gmail.com": "NIDNASSER-Abdelmajid",