Stop the pin hint naming a colour the reader may not see

The default label was "Tap a red dot -- someone still needs prayer" and it
shipped on every map: pinHintLabel is an override no profile has ever set,
and pinHint:false is an opt-out no profile has ever used (verified: zero
occurrences of either across plugin-designs/).

So cities-with-internet and gospel-resources, which have no red dots,
invited readers to tap one; and UPG-100, whose dots are a four-colour
reached/unreached scale, named the wrong colour. A hint describing
something the reader cannot see makes a working map look broken.

Fixed at the default rather than per profile, because the defect was a
default asserting more than it could know. A shared component cannot know
what colour a given map's dots are, so it no longer claims one. Profiles
that do want to name a colour still can, via pinHintLabel.

Reported 5+ times by the Driver.

library/components/hints/PinHint.vue

@@ -43,8 +43,19 @@ import { useShadowStyles } from '../../composables/useShadowStyles.js'
 const uiStore = inject('uiStore', null)
 const profileConfig = inject('profileConfig', null)
 const isDark = computed(() => uiStore?.theme === 'dark')
+// ★ THE DEFAULT MUST NOT NAME A COLOUR (Driver, reported 5+ times).
+// The old default was "Tap a red dot — someone still needs prayer". It shipped on EVERY map,
+// because `pinHintLabel` is an override no profile has ever set and `pinHint:false` is an opt-out
+// no profile has ever used — verified: zero occurrences of either across plugin-designs/.
+// So maps with NO red dots (cities-with-internet, gospel-resources) invited readers to tap a red
+// dot that does not exist, and UPG-100 — whose dots are a four-colour reached/unreached scale —
+// told them the wrong colour. A hint that describes something the reader cannot see is worse than
+// no hint: it makes a working map look broken.
+// The fix is the DEFAULT, not per-profile config, because the defect came from a default that
+// asserted more than it could know. A shared component cannot know what colour a given map's dots
+// are, so it must not claim one; profiles that DO want to name a colour still can, via pinHintLabel.
 const label = computed(() =>
-  profileConfig?.value?.pinHintLabel || 'Tap a red dot — someone still needs prayer')
+  profileConfig?.value?.pinHintLabel || 'Tap a coloured dot — someone still needs prayer')
 
 const visible = ref(false)
 const hintEl = ref(null)