refactor(mermaid): performance optimization and support pan and zoom etc. (#737)

* perf(mermaid): optimize rendering by deferring non-critical tasks and enhancing viewport observation

* feat(mermaid): add panzoom and download svg actions for mermaid

* feat(mermaid): enhance diagram controls and add fullscreen action for code tabs

* feat(i18n): update translation keys for diagram and tab actions in multiple languages

* fix(mermaid): move mermaid-neutral inside diagram-container in wrapper mode

Agent-Logs-Url: https://github.com/hugo-fixit/FixIt/sessions/e79e837e-be0b-445c-8bd3-8c03cdce2651

Co-authored-by: Lruihao <33419593+Lruihao@users.noreply.github.com>

* fix(mermaid): update download filename for SVG export in diagram controls

* refactor(mermaid): refactor rendering logic and enhance task queue for improved performance

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

assets/data/cdn/jsdelivr.yml

@@ -63,6 +63,8 @@ libFiles:
   paceJS: pace-js@1.2.4
   # pangu.js@4.0.7 https://github.com/vinta/pangu.js
   panguJS: pangu@4.0.7/dist/browser/pangu.min.js
+  # @panzoom/panzoom@4.6.2 https://github.com/timmywil/panzoom
+  panzoomJS: '@panzoom/panzoom@4.6.2/dist/panzoom.min.js'
   # sharer.js@0.5.1 https://github.com/ellisonleao/sharer.js
   sharerJS: sharer.js@0.5.1/sharer.min.js
   # @github/tab-container-element@4.8.2 https://github.com/github/tab-container-element

assets/data/cdn/unpkg.yml

@@ -63,6 +63,8 @@ libFiles:
   paceJS: pace-js@1.2.4
   # pangu.js@4.0.7 https://github.com/vinta/pangu.js
   panguJS: pangu@4.0.7/dist/browser/pangu.min.js
+  # @panzoom/panzoom@4.6.2 https://github.com/timmywil/panzoom
+  panzoomJS: '@panzoom/panzoom@4.6.2/dist/panzoom.min.js'
   # sharer.js@0.5.1 https://github.com/ellisonleao/sharer.js
   sharerJS: sharer.js@0.5.1/sharer.min.js
   # @github/tab-container-element@4.8.2 https://github.com/github/tab-container-element