Teams tile: one Colors group, no Positions switches

Colors and Status colors were two groups asking the same question, so they
are one: team header, the tints and the three status colours together.

The Positions switches go entirely — the team switches already decide what
a tile shows, and "Group by position" still arranges what is left. With
them go GET /positions and positionOptions().

Two rules the tile was breaking on the way past: a gear group may carry no
`help` (rule 5), and only hide-toggles belong in Show (rule 8) — so the
group blurbs are gone and the Columns picker sits loose at the top beside
the team switches.

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

modules/pco-plan/module.json

@@ -411,21 +411,35 @@
         "h": 2
       },
       "instanceSchema": {
+        "columns": {
+          "type": "select",
+          "label": "Columns",
+          "default": "auto",
+          "options": [
+            {
+              "value": "auto",
+              "label": "Fit the tile"
+            },
+            {
+              "value": "1",
+              "label": "One"
+            },
+            {
+              "value": "2",
+              "label": "Two"
+            },
+            {
+              "value": "3",
+              "label": "Three"
+            }
+          ]
+        },
         "teams": {
           "type": "multiselect",
           "label": "Teams",
-          "group": "Teams",
-          "optionsRoute": "/teams",
-          "columns": 1,
-          "allByDefault": true
-        },
-        "positions": {
-          "type": "multiselect",
-          "label": "Positions",
-          "group": "Positions",
-          "optionsRoute": "/positions",
           "columns": 2,
-          "allByDefault": true
+          "allByDefault": true,
+          "optionsRoute": "/teams"
         },
         "headerTemplate": {
           "type": "template",
@@ -484,12 +498,6 @@
           "default": false,
           "group": "Colors"
         },
-        "headerGradient": {
-          "type": "boolean",
-          "label": "Header fade",
-          "default": true,
-          "group": "Colors"
-        },
         "tintRows": {
           "type": "boolean",
           "label": "Tint rows too",
@@ -497,23 +505,29 @@
           "group": "Colors",
           "showWhen": "tintTeams"
         },
+        "headerGradient": {
+          "type": "boolean",
+          "label": "Header fade",
+          "default": true,
+          "group": "Colors"
+        },
         "confirmedColor": {
           "type": "color",
           "label": "Confirmed",
           "default": "#2ee59a",
-          "group": "Status colors"
+          "group": "Colors"
         },
         "unconfirmedColor": {
           "type": "color",
           "label": "Unconfirmed",
           "default": "#f0b429",
-          "group": "Status colors"
+          "group": "Colors"
         },
         "declinedColor": {
           "type": "color",
           "label": "Declined",
           "default": "#f4433c",
-          "group": "Status colors"
+          "group": "Colors"
         },
         "showTopBar": {
           "type": "boolean",
@@ -580,52 +594,16 @@
           "label": "Teams with nobody",
           "default": false,
           "group": "Show"
-        },
-        "columns": {
-          "type": "select",
-          "label": "Columns",
-          "default": "auto",
-          "group": "Show",
-          "options": [
-            {
-              "value": "auto",
-              "label": "Fit the tile"
-            },
-            {
-              "value": "1",
-              "label": "One"
-            },
-            {
-              "value": "2",
-              "label": "Two"
-            },
-            {
-              "value": "3",
-              "label": "Three"
-            }
-          ]
         }
       },
       "instanceGroups": {
         "Top bar": {
           "collapsed": false
         },
-        "Teams": {
-          "collapsed": true,
-          "help": "Untick a team to leave it out of this tile."
-        },
-        "Positions": {
-          "collapsed": true,
-          "help": "Untick a position to leave it out. Positions follow the teams above."
-        },
         "Colors": {
           "collapsed": false,
           "columns": 2
         },
-        "Status colors": {
-          "collapsed": true,
-          "columns": 3
-        },
         "Show": {
           "collapsed": true,
           "columns": 2