apps: SDK Test 1.1 -- fix the entry point (1.0 rendered nothing)

My fault, and a good demonstration of why the bench test existed: 1.0 defined
app.start(), which the host never calls. The Lua app contract is on_open(w, h) /
on_input / on_tick / on_close, so 1.0 loaded cleanly and drew an empty screen --
no error, nothing to see.

Also takes the body width from on_open's argument instead of assuming 300 px, so
the rows wrap correctly on a Pager or a Tanmatsu rather than only on a T-Deck.

Shipped as 1.1 in its own directory: version dirs are immutable, and the catalog
bump is what makes a device fetch it at all.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

deploy/apps/apps.json

@@ -2,5 +2,5 @@
   {"id":"monitor","name":"RF Monitor","ver":"1.3","desc":"Scrollable: RSSI/noise chart with dBm axis, link margin, RX rate, radio params, heard feed."},
   {"id":"airtime","name":"Airtime","ver":"1.3","desc":"Utilization bars with a % axis, rx/tx split, duty ceiling, budget. Reset button top-right."},
   {"id":"snake","name":"Snake","ver":"1.0","desc":"The classic, in Lua. Swipe to steer."},
-  {"id":"sdktest","name":"SDK Test","ver":"1.0","desc":"Developer tool. Checks the extended Lua SDK on this board: capabilities, clock, battery, GPS, file access and its limits, keyboard input. Has a button that TRANSMITS a test message to Public (asks permission first)."}
+  {"id":"sdktest","name":"SDK Test","ver":"1.1","desc":"Developer tool. Checks the extended Lua SDK on this board: capabilities, clock, battery, GPS, file access and its limits, keyboard input. Has a button that TRANSMITS a test message to Public (asks permission first)."}
 ]}

deploy/apps/sdktest/1.1/sdktest.json

@@ -1 +1 @@
-{"id":"sdktest","name":"SDK Test","ver":"1.0","desc":"Developer tool. Checks the extended Lua SDK on this board: capabilities, clock, battery, GPS, file access and its limits, keyboard input. Has a button that TRANSMITS a test message to Public (asks permission first)."}
+{"id":"sdktest","name":"SDK Test","ver":"1.1","desc":"Developer tool. Checks the extended Lua SDK on this board: capabilities, clock, battery, GPS, file access and its limits, keyboard input. Has a button that TRANSMITS a test message to Public (asks permission first)."}

deploy/apps/sdktest/1.1/sdktest.lua

@@ -1,22 +1,24 @@
 -- SDK self-test. Exercises everything added to the extended SDK so the results
 -- can be read off the screen instead of inferred from a build log.
--- Not for the store catalog: it is a bench tool.
+-- Published to the store as a developer/bench tool.
 local ui, sys, store, timer = wada.ui, wada.sys, wada.store, wada.timer
 local C = ui.colors
 
 local app = {}
 local rows, keyline, sendline = {}, nil, nil
+local W = 300   -- replaced with the real body width in on_open
 
 local function row(y, text, color)
   local l = ui.label(text, 6, y, 12, color or C.text)
-  l:width(300)
+  l:width(W - 12)
   rows[#rows + 1] = l
   return l
 end
 
 local function yn(v) return v and "yes" or "NO" end
 
-function app.start()
+function app.on_open(w, h)
+  W = w or 300
   ui.scroll(true)
   local y = 4