Keep task selector visible on mobile

Constrain the media selector at widths below 760px so the task selector retains 204px at a 390px viewport. Original desktop layout and palette preserved. Browser verification: document width 390px, no horizontal overflow.

assets/studio.css

@@ -95,3 +95,6 @@
   #review-row {flex-direction:column!important}#sandbox-panel,#review-summary {flex:0 0 auto!important}
   #metrics-panel,#sidebar {flex:0 0 auto!important}
 }
+
+/* Keep both media and task controls visible on narrow screens. */
+@media(max-width:760px){#media-type{width:116px!important;flex:0 0 116px!important}}

docs/ui_case_pool_22_lock.json

@@ -11,7 +11,7 @@
     "assets/native.css": "24b80e61a37ca92f62a871f30114bf2839290abf9c899242033b1aeef3998c38",
     "assets/original.css": "7a244c7f65e40797850dcde7d6b6505b1b5de60aa24b129f44b33ae52291fd2e",
     "assets/paper.css": "61fc60bf8c379a0894fbfe06574964ec2ed256791a23860fa4dbb872eb2869f9",
-    "assets/studio.css": "17a4d588ae8e1099d54043c10e3bc83c9182c33bcf1dda1914053040d4b63fc0",
+    "assets/studio.css": "75d6642b70d07b800a573b6c1c77e5a8d70227196f0a51a6fd0cb3f0f8e44565",
     "assets/xpeng-logo.png": "ff0db78ddf8f9a122eec74e8eb79581f8e5dbc46803dddeb780a06f5ae295750",
     "cases/dense/04_dense_round2_gam_dense200_66.jpg": "c12e0a9cfce7f78ec2f95cff4ae7203da8e8db8c382b9818ed0e8463aaa84c01",
     "cases/dense/05_dense_round2_gam_dense200_77.jpg": "8a1b5031cd6d3f066cc84c99bd1e272994ebb0989f77dd3e978d2acc888cc6b6",