docs: add descriptive help text to use_gpx and autoconnect blueprint fields

Explains each connect markers mode and the dependency between
Intelligent GPX and Show GPX being enabled.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vgmzx8VTTTmCskSpQtsLTr

themes/intotheeast/blueprints/trip.yaml

@@ -58,7 +58,7 @@ form:
             header.use_gpx:
               type: toggle
               label: Show GPX tracks
-              help: 'Display GPX route files on the map'
+              help: 'Draws uploaded GPX files as route lines on the map. Independent of connector lines — you can show GPX tracks without connectors or vice versa. Enable this when using Intelligent GPX connector mode, otherwise that mode falls back to connecting all markers.'
               highlight: 1
               default: 1
               options:
@@ -70,7 +70,7 @@ form:
             header.autoconnect:
               type: select
               label: Connect markers
-              help: 'Controls connector lines between location markers'
+              help: 'On: draws a dashed line between every entry in date order. Manual: no automatic lines — only entries with Force Connect are linked. Intelligent GPX: suppresses the dashed connector where a GPX track already covers that stretch of the route (requires Show GPX enabled); Force Connect still overrides. Off: no connector lines at all, Force Connect is also ignored.'
               default: 'on'
               options:
                 'on': 'On — always connect all'