chore: update dependencies

Backend:
- gunicorn 23.0.0 → 25.1.0
- setuptools 79.0.1 → 82.0.1
- litellm >=1.72.3 → >=1.82.1

Frontend:
- Migrate Tailwind CSS 3 → 4, daisyUI 4 → 5
  - Add @tailwindcss/vite plugin, remove autoprefixer
  - Replace tailwind.config.js with src/app.css (CSS-based config)
  - Convert custom themes (aestheticDark, catppuccinMocha, aestheticLight,
    northernLights) to daisyUI 5 CSS variable format
  - Remove daisyUI v4-only '-bordered' classes from 45 component files
    (input-bordered, select-bordered, textarea-bordered, file-input-bordered
    are removed in v5; borders are default)
- @types/node 22 → 25
- @lukulent/svelte-umami 0.0.3 → 0.0.4
- packageManager: bun@1.2.22 → bun@1.3.10

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

backend/server/requirements.txt

@@ -12,8 +12,8 @@ pillow==12.1.1
 whitenoise==6.12.0
 django-resized==1.0.3
 django-geojson==4.2.0
-setuptools==79.0.1
-gunicorn==23.0.0
+setuptools==82.0.1
+gunicorn==25.1.0
 qrcode==8.2
 slippers==0.6.2
 django-allauth-ui==1.8.1
@@ -33,5 +33,5 @@ legacy-cgi==2.6.4
 requests>=2.32.5
 cryptography>=46.0.5
 django-mcp-server>=0.5.7
-litellm>=1.72.3
+litellm>=1.82.1
 duckduckgo-search>=4.0.0