Timers: each picker entry carries the gear settings that fit its tile

An "All timers" tile keeps the full set — sources, headings, status lines,
the clock's format (now behind the Clock group's title-row switch), the
colours. A solo tile's entry carries only what its one card can use: a
ProPresenter or module timer gets Status lines and the four colours; the
LTC timecode Status lines and the three tones it takes (running, no
signal, stopped); the time-of-day clock its format, seconds and date
alone; a clock another module offers its format plus the idle tone.

Every field is still defined once, in module.json; server.js composes the
subsets from it. The client resolves an absent setting from its own
DEFAULTS rather than from whatever schema the tile has, so a slimmer
schema changes nothing about what a tile shows. Entry descriptions are
one-sentence picker tooltips now.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

modules/propresenter-timers/module.json

@@ -89,7 +89,7 @@
   },
   "instanceGroups": {
     "Show": { "collapsed": false, "columns": 2 },
-    "Clock": { "collapsed": false },
+    "Clock": { "collapsed": false, "toggle": "showClock" },
     "Colours": {
       "collapsed": true,
       "columns": 2,
@@ -97,12 +97,12 @@
     }
   },
   "instanceSchema": {
-    "showClock": { "type": "boolean", "label": "Clock", "default": true, "group": "Show" },
     "showProPresenter": { "type": "boolean", "label": "ProPresenter timers", "default": true, "group": "Show" },
     "showLtc": { "type": "boolean", "label": "LTC timecode", "default": true, "group": "Show" },
     "showModules": { "type": "boolean", "label": "Module timers", "default": true, "group": "Show" },
     "showHeadings": { "type": "boolean", "label": "Source headings", "default": true, "group": "Show" },
     "showStatus": { "type": "boolean", "label": "Status lines", "default": true, "group": "Show" },
+    "showClock": { "type": "switch", "label": "Clock", "default": true, "group": "Clock" },
     "clockFormat": {
       "type": "select",
       "label": "Clock format",