Correct stale claims in menu jsonc headers and bar README

Providers never returned JSON rows: they are shell-defined row sources
emitting tab-delimited lines, and extensions cannot declare new names.
bar.shellQuote moved to Util.qml, and the UpperCamelCase widget id
migration no longer exists.

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

config/omarchy/extensions/omarchy-menu.jsonc

@@ -10,7 +10,7 @@
   //   label       Visible row title.
   //   action      Shell command to run. If omitted, the row is a submenu.
   //   target      Existing submenu id to open. Use for links/aliases.
-  //   provider    Runtime provider function/command returning JSON rows.
+  //   provider    Name of a shell-defined runtime row source (e.g. "fonts").
   //   aliases     alternate `omarchy menu summon <name>` routes; also searchable.
   //   description Optional subtitle and extra search text.
   //   when        Shell condition; hide row when it fails.
@@ -21,8 +21,8 @@
   // "personal.notes": {"icon":"󰎞","label":"Notes","action":"omarchy-launch-editor ~/notes"},
   // "personal.files": {"icon":"","label":"Files","action":"uwsm-app -- nautilus ~/Documents"},
   //
-  // Only use provider when a provider_name function or command named "name"
-  // returns JSON rows. Static submenus only need dotted ids.
+  // provider can only reference row sources the shell already defines (the
+  // providers map in Menu.qml). Static submenus only need dotted ids.
   //
   // Example: replace the default About action by reusing the same id. Existing
   // fields are kept unless overridden.

default/omarchy/omarchy-menu.jsonc

@@ -4,8 +4,9 @@
   // IDs are object keys. Dotted IDs imply hierarchy: trigger.share.file belongs
   // under trigger.share.
   // Kind is inferred: action -> action, target -> link, otherwise submenu.
-  // Dotted IDs define the tree. Use provider:"name" only when the submenu
-  // calls provider_name() or a command named "name" to return JSON rows.
+  // Dotted IDs define the tree. provider:"name" points a submenu at one of
+  // the shell's providers (the providers map in shell/plugins/menu/Menu.qml);
+  // new provider names cannot be declared here. See docs/menu.md.
   // Optional fields:
   //   aliases        alternate `omarchy menu summon <name>` routes; also searchable.
   //                  Reserved for established names users already type; new entries

shell/plugins/bar/README.md

@@ -160,8 +160,7 @@ Widgets receive `bar` (the shell root), `moduleName` (string), and `settings` (o
 - `bar.position` — `"top" | "bottom" | "left" | "right"`
 - `bar.vertical` — boolean shortcut
 - `bar.barSize` — 26 horizontal / 28 vertical
-- `bar.run(command)` — fire-and-forget bash exec
-- `bar.shellQuote(value)` — safe shell-quote a string
+- `bar.run(command)` — fire-and-forget bash exec (quote arguments with `Util.shellQuote` from `qs.Commons`)
 - `bar.showTooltip(target, text)` / `bar.hideTooltip(target)` — shared tooltip popup
 - `bar.requestPopout(owner)` / `bar.releasePopout(owner)` — one-popup-at-a-time coordinator
 
@@ -171,9 +170,7 @@ richer popup plugins live in feature directories such as `../panels/audio/`,
 `../panels/network/`, and `../agents/`; and feature plugins such as
 `omarchy.menu` and `omarchy.media` declare their bar-widget entry points in their own
 `manifest.json`. Bar layout ids are namespaced, e.g. `omarchy.audio`,
-`omarchy.network`, and `omarchy.clock`. Older UpperCamelCase ids such as
-`AudioPanel` and `Clock` are migrated forward; new configs should use the
-namespaced ids.
+`omarchy.network`, and `omarchy.clock`.
 
 Third-party widgets ship as separate plugins under
 `~/.config/omarchy/plugins/<plugin-id>/` with their own `manifest.json`