feat: add new styles for unsupported attachments (preview, message, channel preview)

[MartinCupela]

🎯 Goal

New styling of unsupported attachments
Rule that sender is not shown in DM channel preview if the last message author is the other user (comes from the design spec)
Apply message bubble width rules as follows:

• Text-only bubbles render at 400px (or full width on smaller screens) and wrap text inside that width.
• Any bubble with attachments also uses 400px (or full width on smaller screens), regardless of text length.

🎨 UI Changes

Fix alignment of of media attachments, that do not stretch to the full width of the message bubble:

Figma:

[github-actions]

Size Change: +1.56 kB (+0.25%)

Total Size: 617 kB

📦 View Changed

Filename	Size	Change
dist/cjs/index.js	237 kB	+219 B (+0.09%)
dist/cjs/WithAudioPlayback.js	44.1 kB	+405 B (+0.93%)
dist/css/index.css	45.7 kB	+339 B (+0.75%)
dist/es/emojis.mjs	2.47 kB	-2 B (-0.08%)
dist/es/index.mjs	236 kB	+190 B (+0.08%)
dist/es/WithAudioPlayback.mjs	43.9 kB	+406 B (+0.93%)

ℹ️ View Unchanged

Filename	Size
dist/cjs/audioProcessing.js	1.32 kB
dist/cjs/emojis.js	2.96 kB
dist/cjs/mp3-encoder.js	1.27 kB
dist/css/emoji-replacement.css	456 B
dist/es/audioProcessing.mjs	1.31 kB
dist/es/mp3-encoder.mjs	756 B

_{compressed-size-action}