Fix OCL Chat header icon and favicon to match TBv3

[paynejd]

Both are showing nothing right now, as if a file might even be missing.

[ocl-automation]

Automated Triage — 2026-09-18

Dimension	Score
Complexity	2
Scope	1
Clarity	3
Dependency	1
Risk	1

Decision: decision/human-review
Type: type/bug
Signals: signal/low-risk, signal/small-scope

Straightforward fix to update missing/broken icon files in OCL Chat to match TBv3 styling. Clear intent but missing specifics about which files need updating or where TBv3 assets are located. Low risk cosmetic issue.

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Generated by ticket-triage pipeline v3. Model: anthropic/claude-sonnet-4 (openrouter).

[snyaggarwal]

This is now corrected -- uploaded in chat.openconceptlab.org Admin -> Appearance
(may need to clear cache)

Also applied OCL font and color palatte to light theme and made it default.
We really dont have dark theme and claude suggestions there I am not liking -- I have still applied the color pallete for dark which is better than discourse default.