Story 5.2: Video Widget Width Customization

Implements configurable video widget widths for small and large dock layouts:
- Add widgetWidthSm and widgetWidthMd world settings (defaults: 83px, 150px)
- Add width dropdown selectors in Director's Board UI
- Apply width settings to participant avatars via CSS custom properties
- Update strip width/height calculations to use custom widths
- Add localization strings for widget width settings
- Add CSS styling for widget width dropdown controls
- Fix Handlebars template syntax for select element selected values

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

.playwright-mcp/page-2026-05-25T10-52-59-464Z.yml

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+- generic [active] [ref=e1]:
+  - banner [ref=e3]:
+    - heading "Critical Failure!" [level=1] [ref=e4]
+  - article [ref=e5]:
+    - heading "Foundry Virtual Tabletop" [level=2] [ref=e6]
+    - paragraph [ref=e8]: There is currently no active game session. Please wait for the host to configure the world and then refresh this page.
+    - link " Go Back" [ref=e10]:
+      - /url: /setup
+      - generic: 
+      - text: Go Back
+  - contentinfo [ref=e11]:
+    - paragraph [ref=e12]: Version 13 Build 351