fix(themes): dim the summer rasi search placeholder + latte/backdrop findings (item 28c)

Both summer whole-swap rasi rendered prompt and placeholder in the
same bg0 on the green inputbar, reading as one run-on phrase — the
placeholder is now bg0 at 60% alpha, matching the generated theme's
hierarchy.

Recorded with it: the catppuccin-latte 1080p capture shows the
generated menu fully coherent on light themes (the audit's "dark
terminal on latte" was a stale preview), and a dedicated VM probe
confirms misc:background_color is applied (hyprctl getoption =
0xFFEFF1F5) — the dark backdrop in captures is awww's empty-state
layer over it, a wallpaper-less-VM artifact, not a defect.

Verified: rasi edits grep-verified (visual rides the next summer
capture / hardware); latte capture + probe reviewed. Item 28 is now
gated on the icon-weight [human] call and the queued hardware
eyeballs.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

agent/JOURNAL.md

@@ -17,6 +17,29 @@ Template:
 
 ---
 
+## 2026-07-05 — placeholder dim + latte review + backdrop probe (iteration #38, item 28c)
+- **Task:** item 28 slice (c) — the summer-rasi quickie + the light-
+  theme capture.
+- **Did:** both summer rasi: placeholder-color @bg0 → bg0 at 60%
+  alpha (#…99), so prompt and placeholder no longer read as one
+  phrase. Captured catppuccin-latte at 1080p: the generated menu is
+  COHERENT on light themes (zebra rows on the 28b-retuned surface,
+  hints dimmed) — closes the audit's "dark terminal on latte"
+  concern as a stale preview. Backdrop suspicion probed with a
+  dedicated VM (hyprctl getoption): misc:background_color IS set
+  (0xFFEFF1F5) — awww's empty-state layer occludes it in the
+  wallpaper-less VM; on hardware the fix covers the startup gap as
+  intended.
+- **Verified:** rasi edits grep-verified (rasi parses at rofi
+  runtime; visual rides the next summer capture / V3); latte menu
+  capture reviewed; probe output above.
+- **Pending:** item 28 remaining: icon-weight `[human]`, hardware
+  eyeballs (queued), identity-theme capture (optional), slice (d)
+  needs nothing (parity verified).
+- **Next suggestion:** item 28 is now Bernardo-gated (taste calls +
+  V3); the loop should return to the general BACKLOG head (item 14
+  watch / item 17 launch-or-focus).
+
 ## 2026-07-05 — rofi keybind hints (iteration #37, item 28c)
 - **Task:** item 28 slice (c) — the hint column, the audit's biggest
   remaining UX item.