Add in-place dashboard edit mode

A toggle on the dashboard flips into edit mode where widgets get
drag/edit/delete handles and a "+ Add widget" button per column. Most
edits no longer require touching YAML.

- Drag-drop reorder via SortableJS, persisted through a bulk-layout
  endpoint that rebuilds each column's widgets sequence in the
  yaml.Node tree.
- Inline form dialog driven by per-widget field schemas
  (admin-schemas.go) covering 25 widget types. Surgical updates apply
  changed fields to the widget node so untouched keys and comments
  survive. Falls back to the existing YAML editor for group and
  split-column (those need a recursive nested-widget UI).
- Per-column "+ Add widget" picker that opens the dialog pre-filled
  with sensible defaults for the chosen type.
- Field validation and autocomplete for weather location (Open-Meteo
  geocoding), market symbol (Yahoo Finance), and RSS feed URL
  (gofeed). Network failures soft-pass for weather/markets so the
  save isn't blocked when external APIs are unreachable.
- Picking a market suggestion auto-fills the company name field via
  per-suggestion `extra` fields.
- Edit mode persists across reloads via localStorage so saves don't
  drop the user back into view mode.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docs/glance.yml

@@ -32,31 +32,14 @@ pages:
               collapse-after: 3
               cache: 12h
               feeds:
-                - url: https://selfh.st/rss/
-                  title: selfh.st
-                  limit: 4
-                - url: https://ciechanow.ski/atom.xml
-                - url: https://www.joshwcomeau.com/rss.xml
-                  title: Josh Comeau
-                - url: https://samwho.dev/rss.xml
-                - url: https://ishadeed.com/feed.xml
-                  title: Ahmad Shadeed
                 - url: https://www.techmeme.com/feed.xml
                   title: TechMeme
-            - type: twitch-channels
-              channels:
-                - theprimeagen
-                - j_blow
-                - giantwaffle
-                - cohhcarnage
-                - christitustech
-                - EJ_SA
+            - type: server-stats
         - size: full
           widgets:
             - type: group
               widgets:
                 - type: hacker-news
-                - type: lobsters
             - type: videos
               channels:
                 - UCXuqSBlHAE6Xw-yeJA0Tunw # Linus Tech Tips
@@ -75,33 +58,18 @@ pages:
         - size: small
           widgets:
             - type: weather
-              location: London, United Kingdom
-              units: metric # alternatively "imperial"
-              hour-format: 12h # alternatively "24h"
+              location: Houston, US
+              units: imperial
+              hour-format: 12h
               # Optionally hide the location from being displayed in the widget
               # hide-location: true
+
+              hide-location: true
+              show-area-name: false
             - type: markets
               markets:
-                - symbol: SPY
-                  name: S&P 500
-                - symbol: BTC-USD
-                  name: Bitcoin
-                - symbol: NVDA
-                  name: NVIDIA
-                - symbol: AAPL
-                  name: Apple
-                - symbol: MSFT
-                  name: Microsoft
-            - type: releases
-              cache: 1d
-              # Without authentication the Github API allows for up to 60 requests per hour. You can create a
-              # read-only token from your Github account settings and use it here to increase the limit.
-              # token: ...
-              repositories:
-                - glanceapp/glance
-                - go-gitea/gitea
-                - immich-app/immich
-                - syncthing/syncthing
+                - symbol: AMZN
+                  name: Amazon.com, Inc.
 
 # Add more pages here:
 # - name: Your page name