Revert "Strengthen search breadth and modal fitting"

This reverts commit 5ca7aef3f1.

TODO.md

@@ -33,7 +33,6 @@
 - Result modal sizing is now being constrained to the viewport, and modal-only source-summary translation is now part of the active implementation path.
 - Card summaries now also translate lazily to Korean, and Gemini negative-assessment handling now drives stronger follow-up search behavior than before.
 - Search preview delivery is now moving away from persistent on-disk preview caching toward live proxy / live transcode behavior, with Google Video preview reuse added to result cards and modal playback.
-- Search breadth and Gemini review budget were widened again because the latest user feedback still reported a thin visible result count even after smarter filtering.
 
 ## Current Architecture
 - `backend/main.go`
@@ -232,7 +231,6 @@
 - Source Summary translation now depends on Google Translate HTTP availability; frontend silently falls back to original summary text if translation fails.
 - The result modal should now stay within viewport height, but this still needs real browser confirmation on multiple short-height displays because CSS-only constraints were the source of the latest user-visible regression.
 - Artgrid preview playback now has a server-side ffmpeg transcode path for `.m3u8` style preview URLs, but this trades storage savings for runtime CPU cost.
-- The provided Artgrid HTML sample still does not expose a direct preview `m3u8` or `mp4` URL by itself, and `yt-dlp` probe on the sample clip URL returned `Unsupported URL`, so fully reliable Artgrid playback still depends on live-page/runtime preview discovery succeeding elsewhere in the pipeline.
 - The local self-test script is better than before, but it is still a smoke test, not full integration coverage.
 
 ## Current Risks Around Search Quality
@@ -558,7 +556,6 @@
 - [ ] Browser-verify the new result modal at multiple viewport heights and confirm translated Source Summary readability on real long descriptions
 - [ ] Evaluate whether the new Gemini supplemental-query generation is reducing irrelevant results on a small fixed benchmark query set
 - [ ] Measure runtime cost of live Artgrid preview transcoding and decide whether bounded in-memory throttling or concurrency caps are needed
-- [ ] If Artgrid playback is still required for previewless clips, investigate a browser-rendered fetch path or clip-page asset bundle analysis because static HTML + `yt-dlp` probe were both insufficient on the supplied sample
 - [ ] Revisit Google Video UX:
   - current YouTube embed was abandoned due error `153`
   - current in-app panel is more reliable but less rich than a true embedded watch page
@@ -624,25 +621,6 @@
 - If behavior in the browser does not match the latest backend/frontend code, the first assumption should be stale frontend assets until proven otherwise
 
 ## Recent Change Log
-- Date: `2026-03-17`
-- What changed:
-  - Raised search breadth again by widening per-source collector caps, increasing the number of base queries considered, increasing per-collector query budgets, and expanding the Gemini candidate review budget.
-  - Added another browser-resolution-aware modal fitting pass: the result popup now recalculates shell width, shell height, media max height, and compact-mode behavior from `window.innerWidth` / `window.innerHeight` when opened or when the viewport changes.
-  - Removed the fixed minimum heights on the lower modal panels so they can shrink with the viewport instead of forcing the popup past the visible browser area.
-  - Checked the supplied Artgrid clip HTML and a direct `yt-dlp` probe against `https://artgrid.io/clip/355470/...`; the HTML still exposes metadata and thumbnail signals only, and the direct probe returned `Unsupported URL`.
-- Why it changed:
-  - The user reported that the popup still overflowed the browser viewport and that the visible result set still felt too thin despite the earlier search-expansion work.
-  - The attached Artgrid HTML sample was intended to verify whether a stable preview URL could be extracted directly from static clip HTML.
-- How it was verified:
-  - `go test ./...`
-  - `bash scripts/selftest.sh`
-  - `python3 -m py_compile worker/downloader.py scripts/mock_searxng.py`
-  - `python3 worker/downloader.py --mode probe --url 'https://artgrid.io/clip/355470/couple-woman-man-holding-hand'`
-- What is still risky or incomplete:
-  - The new modal layout now adapts to actual browser viewport dimensions in code, but a live browser confirmation on the exact user display is still needed.
-  - Widening search breadth and Gemini review budget should improve visible count, but it can also increase latency and token cost under poor upstream conditions.
-  - The supplied Artgrid HTML sample alone was not enough to derive a directly playable preview URL, so previewless Artgrid clips may still fall back to thumbnail-only behavior.
-
 - Date: `2026-03-17`
 - What changed:
   - If the first search pass plus Gemini filtering still leaves too few visible results, the backend now performs an additional coverage-expansion search/evaluation pass before final fallback filling.