Restore visible favorite star state

[RANGROO]

Summary

• restore unmistakable gold favorite-star hover, focus, and active states on Stobe NPC cards and the partial editor
• keep the existing hollow/filled glyph, button sizing, Kenshi branding, and persistence behavior unchanged

Root cause

The NPC page already declared gold favorite states, but the Stobe button theme forces cream text and clears text shadow with higher-priority declarations.

Implementation

Scope the existing card favorite selectors and protect the partial editor's favorite-only states without changing lock, picture, or delete controls.

Validation

• Claude Opus 5 independently reviewed the Stobe cascade and markup
• php -l ui/stobenpcs.php
• runtime PHP lint passed
• git diff --check
• live hover rendered rgb(255, 215, 0) with the intended gold glow
• desktop screenshot captured locally
• 390 x 844 viewport exercised; the existing 22 px page overflow is outside this color-only diff
• local page returned HTTP 200
• reviewable diff: 9 changed lines in one PHP file

Compatibility and performance

• no JavaScript, database, layout, responsive, or player-faction behavior changes
• CSS-only state styling; no measurable runtime or bloat impact

Deployment

Deployed commit 81ad397bc4176ba9fdbd880f8879685f51dc08e2 to /var/www/html/StobeServer/ui/stobenpcs.php; deployed and source blobs match.

Known limits

• the local dataset has no active favorite, so persistence was not toggled and the filled state was verified from the live loaded CSS rule rather than a database mutation
• keyboard-focus rule is loaded alongside the verified hover rule, but automated Tab traversal did not move focus in the browser harness
• no in-game validation; this is server WebUI-only styling

Companion source report/fix: abeiro/HerikaServer#727

Sibling PRs

• HerikaServer: Restore visible favorite star state abeiro/HerikaServer#727
• ALMSIVIserver: https://github.com/RANGROO/ALMSIVIserver/pull/7
• StobeServer: Restore visible favorite star state #96
• DialecticServer: Restore visible favorite star state DialecticServer#84