Send Message 1.0.0: one PIN, one place to send from; Slack 1.3.0 and ProdCom 1.4.0 become messaging providers

A new send-message module owns everything a dashboard sends: the PIN
(switchable off in admin), the unlock tokens, the Send message and Quick
replies tiles, the quick replies and quick emojis. It opens no upstream
connection of its own — it finds every module declaring
provides: ["messaging"] through the shell's module list and hands each
message to that module's POST /messaging/send over loopback, so Slack keeps
its one Slack connection and ProdCom its one ProdCom connection. Providers
check the browser's unlock token with GET /verify over loopback before
touching their upstream, so no browser on the network can post as the
location without having entered the PIN here.

Slack 1.3.0 is view-only plus reactions: the Sending group, PIN, send tiles
and quick replies are gone; it serves the messaging descriptor (channels as
recipients) and its reactions ride on the Send Message unlock. A layout's
old Send message / Quick replies tiles draw nothing until removed.

ProdCom 1.4.0 serves the descriptor as identities — only channels with
typingEnabled, since typed text goes out *as* a channel — and posts with
POST /api/v1/channels/{id}/send. Its tile is a click-to-target like Slack's
(accent stripe along the bottom), and typed entries carry a keyboard mark.

The tiles: click any Slack or ProdCom transcript to point sends there; a
Send as menu (only for platforms with identities, hidden otherwise) picks
the ProdCom channel to speak as; the choice is saved with the tile so named
layouts remember it. Wording follows the role — "Send message to #ops…" /
"Send message to ProdCom as FOH…". The PIN pad's dots ride on a real
numeric input so a phone's keyboard appears. Outcome is an icon beside
Send (check / blocked, five seconds, sentence as tooltip). A pill on the
box's bottom edge trades box height for rows of quick-emoji keys, a row
at a time; the single row scrolls sideways on a narrow tile with Send
pinned in place.

The module guide documents the provider contract and the page bus
(window.proddashMessaging + proddash:messaging:* events) the tiles share;
the ProdCom mock gained the send route.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

modules/send-message/module.json

@@ -0,0 +1,63 @@
+{
+  "id": "send-message",
+  "name": "Send Message",
+  "version": "1.0.0",
+  "proddash": ">=1.4.0",
+  "description": "PIN-protected sending to Slack, ProdCom and any other messaging module, from one tile",
+  "client": "client.js",
+  "server": "server.js",
+  "style": "style.css",
+  "minSize": {
+    "w": 2,
+    "h": 2
+  },
+  "defaultSize": {
+    "w": 3,
+    "h": 3
+  },
+  "configGroups": {
+    "PIN": {
+      "toggle": "pinEnabled",
+      "help": "Nothing leaves this machine until the PIN is entered on a Send message or Quick replies tile. One PIN unlocks every messaging tile on that dashboard page — Send message, Quick replies and Slack's reaction menu — until Auto-lock minutes pass without a send; a reload asks again. With the PIN switched off, the tiles send without asking. Sending stays refused while the PIN is on but not yet set."
+    },
+    "Presets": {
+      "help": "Quick replies are one per line, Label | Message. Add | platform:destination to bind one — slack:#production or prodcom:FOH — and that reply always goes there, whichever transcript is selected. Quick emojis are sent as a message of their own with one press from the Send message tile."
+    }
+  },
+  "configSchema": {
+    "pinEnabled": {
+      "type": "switch",
+      "label": "PIN",
+      "default": true,
+      "group": "PIN"
+    },
+    "pin": {
+      "type": "password",
+      "label": "PIN",
+      "default": "",
+      "group": "PIN",
+      "help": "4–8 digits; the pad unlocks by itself once they are all in."
+    },
+    "pinIdleMinutes": {
+      "type": "number",
+      "label": "Auto-lock (min)",
+      "default": 10,
+      "group": "PIN"
+    },
+    "quickReplies": {
+      "type": "text",
+      "label": "Quick replies",
+      "default": "",
+      "group": "Presets",
+      "help": "One per line: Label | Message. Add | slack:#channel or | prodcom:Channel to bind one to a destination."
+    },
+    "quickEmojis": {
+      "type": "string",
+      "label": "Quick emojis",
+      "default": "👍 🙏 ✅ 👀 🎉",
+      "group": "Presets",
+      "help": "Emoji separated by spaces, eight at most. Sent as plain text to whatever is selected."
+    }
+  },
+  "instanceSchema": {}
+}