[Feature]: Add dark mode support to all document editors and builders

[Muneerali199]

Description

The global theme toggle works but document editors (presentation builder, resume editor, diagram generator, visual editor panels) do not properly adapt to dark mode.

Goals

• Add dark mode theming to the visual editor and all its panels
• Update presentation generator for dark mode
• Update resume editor for dark mode
• Update diagram generator for dark mode
• Use CSS variables for easy theming
• Ensure proper contrast in all editing surfaces

Files

• components/presentation/real-time-generator.tsx
• components/resume/resume-editor.tsx
• components/diagram/diagram-generator.tsx
• components/editor/visual-editor.tsx

[BHAGYASRI-ux]

Hi @Muneerali199 .I would like to work on this issue. Kindly assign me this issue.

[aaniya22]

pls assign this to me under gssoc

[ShafinNigamana]

Please assign this issue to me. I would like to work on this as part of GSSoC 2026.