Search Sonarr/Radarr directly on Discover, full top nav, live System links

- Discover's search now hits Radarr's/Sonarr's own lookup endpoints
  directly (the same ones /add-to-radarr and /add-to-sonarr already
  use), instead of Ombi — one fewer round trip, and a result always
  resolves the same way its own Add button will. The Ombi-based
  ombi_search/_tmdb_poster helpers are gone.
- The top nav on every page but the index now lists all eight
  destinations (FULL_FASTEXT) instead of the original four; the index
  keeps the original four-entry row as its own closing line
  (HOME_FASTEXT), since its body already lists every destination once.
- System page's Transmission rows are now links to each service's own
  reverse-proxied instance (service_urls, already injected into every
  template but unused until now).

CLAUDE.md

@@ -96,12 +96,20 @@ the user's Unraid home server. Server-side project directory is still named
     `--ink-dimmer` fails contrast, which is exactly the bug the redesign's
     first inspection round caught.
   - **Navigation is the page number.** Typing any three digits anywhere
-    jumps to that page, and `r`/`g`/`y`/`c` fire the four fastext colour
-    keys — both in `static/js/service.js`. `nav_items` in `app.py` is the
-    source of truth for the numbers and is serialised into
+    jumps to that page, and `r`/`g`/`y`/`c` fire four of the fastext
+    entries — both in `static/js/service.js`. `nav_items` in `app.py` is
+    the source of truth for the numbers and is serialised into
     `<body data-pages>`.
+  - **Fastext leads everywhere but the index, and closes the index.**
+    `FULL_FASTEXT` in `app.py` lists every destination and renders right
+    under the header on every page but the index — those pages carry no
+    other nav, so it needs no scroll to reach. The index overrides it
+    with `HOME_FASTEXT`, the original four-entry row, as its own closing
+    line, since its body already lists every destination once. Only
+    those original four (Index/Library/Discover/System) carry an `r`/
+    `g`/`y`/`c` keyboard shortcut; the rest are click-only.
   - **Nothing is clipped, hidden, or sticky.** All seven page numbers and
-    all four fastext keys stay visible at every width, reflowing to another
+    every fastext entry stay visible at every width, reflowing to another
     row rather than scrolling, truncating, or folding into a menu. No
     header is sticky.
 - **`export-to-unraid.sh`** — a pre-existing standalone deploy script