fix: make settings dropdown text readable across all themes

[zulfikar-ditya]

Fixes #34

Root cause

dropdown.foreground was set to #7c86ff20 in all 6 theme variants — the accent color at 12% alpha, which renders option text effectively invisible. dropdown.background and dropdown.listBackground were translucent with the same value, so the settings rows behind the open option list bled through it (visible in the issue screenshot, where "Chat › Agent: Max Requests" shows through the popup).

Fix

Each variant now uses an opaque surface matching its existing editorWidget.background, with a high-contrast foreground:

Theme	background / listBackground	foreground	contrast
Fexend Theme (+ Italic)	#020617	#ffffff	20.2:1
Medium Purple (+ Italic)	#1e1537	#ffffff	17.3:1
Soft Dark (+ Italic)	#0f172a	#e2e8f0	14.5:1

dropdown.border goes from #7c86ff20 to #7c86ff40 so the now-opaque popup keeps a visible edge against the editor.

Notes

• Medium Purple and Soft Dark define no settings.dropdown* keys at all, so their settings dropdowns inherit dropdown.* directly — that's why the closed control was faint there too, while the two main variants already had settings.dropdownForeground: #ffffff. The dropdown.* fix covers them through inheritance; no duplicate keys added.
• Swept every theme for other *.foreground values with alpha below 0x60. The only other hits are intentional (whitespace glyphs, dimmed line numbers, overview-ruler marks) — dropdown.foreground was the sole text-readability bug.
• Bumped to 1.0.9 with a CHANGELOG entry, matching the convention from the 1.0.8 fix.

🤖 Generated with Claude Code