Plant assistant mockup: operator, management, sales

docs/plant-assistant.html (test site /demos/plant-assistant/): the
plant assistant on vinyl-ai as three roles see it. Operator at the C1
press kiosk in Thai or English with push to talk (non-fill rejects
explained from cycle rows, lot change and press hall humidity, the
stamper change procedure quoted from the approved version, a lot on
hold, a refused price question, a safety question answered word for
word); management at a desk (output and yield per press against the
plan basis, steam per record against scale.md, orders at risk, the
weekly note, payroll refused); sales on a phone (order status and ship
window, repress feasibility from archived mothers and the standby
calendar, repress leads, a test pressing status, fans' addresses
refused). Each answer carries numbered sources; the side panel shows
the tool calls (ERPNext as the asker's role, the PostgreSQL replica,
VictoriaMetrics, documents, event log) on premises with the internet
not used; action buttons create drafts only. Deep links
#role=<role>&q=<id>, light and dark theme. Invented data; names match
the factory console demo.

plant-assistant.md: mockup link; sales and customer service row in
"Who asks what"; sales drafts (quotation, CRM opportunity, message).
README, site index and site/build.sh link and publish the page.

README.md

@@ -267,6 +267,12 @@ The detail lives in dedicated documents:
   stamper metrology, the hash-chained event log, and the customer portal
   for the same orders (steps, copies pressed so far, lab and inspection
   results, approving a test pressing)
+- [Plant assistant mockup](docs/plant-assistant.html): the
+  [plant assistant](docs/plant-assistant.md) on `vinyl-ai` as an operator
+  at the press kiosk (Thai, push to talk), management at a desk and sales
+  on a phone see it: answers with their sources, the tool calls beside
+  each answer, drafts that a person submits, safety steps quoted word for
+  word and the questions it refuses
 - [Steam and cooling](docs/steam-cooling.html): the utility plant for the
   launch plant (one Duplex system and one Classic; rooms built for four
   modules, the five-press growth case one click away) as a clickable
@@ -445,6 +451,7 @@ docs/
 │                          Payap rezoning route)
 ├── make-a-record.html     Artist platform investor demo (end-user flow)
 ├── payap-partnership.md   Joint student programmes with Payap University
+├── plant-assistant.html   Plant assistant (vinyl-ai) mockup: operator, management, sales
 ├── plant-assistant.md     Ask the plant: assistant on knowledge base and data
 ├── plant-operation.html   Animated plant overview (simulated SCADA)
 ├── process-flow.md        Audio file to delivered record, with all checks