feat: pipeline templates, analytics opt-out, 83 conversion presets, positioning + e2e modernization

Lands five integrated branches: pipeline templates (#355), analytics opt-out (#354), 83 conversion presets bringing the catalog to 240 tools (#356), self-hosted positioning (#353), and e2e modernization (#351).

Integration fixes: aligned stale web analytics tests with the opt-out/allow-list model, closed 3 CodeQL incomplete-sanitization alerts in the i18n generator, resolved settings/index/docs/format-matrix conflicts, and corrected tool counts to 240.

apps/web/src/pages/home-page.tsx

@@ -89,7 +89,7 @@ export function HomePage() {
     if (!search || search.length < 2) return;
     const timer = setTimeout(() => {
       import("@/lib/analytics").then(({ track }) => {
-        track(ANALYTICS_EVENTS.SEARCH, { query: search, results_count: searchResults.length });
+        track(ANALYTICS_EVENTS.SEARCH, { results_count: searchResults.length });
       });
     }, 1000);
     return () => clearTimeout(timer);
@@ -195,6 +195,14 @@ function HomeSearchBar({
         type="text"
         value={value}
         onChange={(e) => onChange(e.target.value)}
+        onKeyDown={(e) => {
+          // Escape steps out of the search field: clear a query if present,
+          // otherwise drop focus back to the page.
+          if (e.key === "Escape") {
+            if (value) onChange("");
+            e.currentTarget.blur();
+          }
+        }}
         placeholder={placeholder}
         aria-label={placeholder}
         className="w-full ps-11 pe-20 py-2.5 rounded-lg border border-border bg-card text-sm text-foreground placeholder:text-muted-foreground/60 focus:outline-none focus:ring-2 focus:ring-primary/30 focus:border-primary/40 transition-shadow"
@@ -244,7 +252,10 @@ function ModalityTabs({
             className={cn(
               "px-3.5 py-1.5 rounded-full text-sm font-medium transition-colors whitespace-nowrap",
               activeTab === tab.key
-                ? "bg-primary text-primary-foreground shadow-sm"
+                ? // Fixed dark text on the orange pill (the orange is the same
+                  // in both themes). White on Otter Orange is only ~3:1, below
+                  // WCAG AA for this 14px label; near-black reaches ~5.8:1.
+                  "bg-primary text-[#1a1814] shadow-sm"
                 : "text-muted-foreground hover:bg-muted hover:text-foreground",
             )}
           >