chore(lint): bring .tsx files into the eslint, lefthook, and jscpd lanes

.tsx sources and specs were invisible to every lint surface: the eslint
flat-config globs, the lefthook staged-file glob, and the jscpd clone
scan all matched *.ts only. Widen the five eslint file groups (source,
test, client-test, sonar, formatting), the pre-commit glob, and the
jscpd format/pattern to cover .tsx.

Existing .tsx files predate these lanes; follow-up commits on this PR
clear the backlog they surface.

lefthook.yml

@@ -5,7 +5,7 @@
 pre-commit:
   jobs:
     - name: lint (staged)
-      glob: '*.{ts,mts,cts,mjs}'
+      glob: '*.{ts,tsx,mts,cts,mjs}'
       exclude:
         - 'vendor/*/src/**'
       run: node_modules/.bin/eslint --fix {staged_files}