Expand search breadth and modal action metadata

TODO.md

@@ -255,6 +255,19 @@
   - backend debug broadcasts
 
 ## Recent Change Log
+- Date: `2026-03-16`
+- What changed:
+  - Expanded search breadth moderately by increasing base query count, collector query budgets, per-source caps, enrichment scope, and final visible result target while keeping Gemini review cap at `16`.
+  - Reworked recommendation action metadata so Google Video now advertises `Direct Download` as the primary CTA, while Envato and Artgrid advertise `Open Source`.
+  - Changed default modal media priority so Artgrid now prefers preview video ahead of thumbnail when both are available, and Google Video now defaults to a webpage-like thumbnail mode instead of embed-first.
+  - Added visible-count style debug summary fields to support checking whether the widened search budget actually increases user-facing choice.
+- Why it changed:
+  - The UI was much healthier, but the remaining request from the user was to widen the pool of selectable results without undoing the recent quality gains, and to align modal CTA semantics with what each source can actually do.
+- How it was verified:
+  - `go test ./...`
+- What is still risky or incomplete:
+  - The widened search budget may increase latency on worse SearXNG days, so the frontend/UI half of this batch still needs to land before the full user-facing behavior is validated.
+
 - Date: `2026-03-16`
 - What changed:
   - Rewired the result modal to consume backend media metadata instead of hard-coded source branches.