feat(editor): F4.5a the device sheet for PCs, notebooks, switches and modems

Measured first: the new oracle SheetRun types 77 texts into FILIUS' own
settings panels and records what was marked red, what the device took and
what the field showed afterwards. Java's two judgements disagree (red text
taken, black text refused, any int as a modem port, a refused text dropped
without a word); here one rule decides both (packages/doc fields.ts), a
refused text stays marked in the field, and only what Java's model accepts
reaches the document.

- doc: settings.ts (name, label policy, addresses, IP forwarding, DHCP
  stopping the own DHCP server, LAN/WLAN with the wireless connection,
  switch SSID dropping its wireless hosts, retention time, cloud, modem
  port as its pair), sheet.ts (what the sheet shows)
- fls: modemPair/modemPort in one place
- editor: DeviceSheet beside the surface or below it on a phone, opened
  with the selection; every change one undo step
- not adopted from Java: the name overwritten by the MAC address, the
  access point search depending on unrelated devices

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/doc/test/sheet.cases.txt

@@ -0,0 +1,80 @@
+# Text typed into FILIUS' settings panels (tools/java-oracle SheetRun):
+# <device> <field> <text>, the text may be empty; \uXXXX for anything but
+# printable ASCII and for spaces at either end.
+host name Neuer Name
+host name 
+host name \u0020\u0020PC 1\u0020\u0020
+host name \u00c4rger-\u00df
+host ip 10.0.0.1
+host ip 010.000.000.001
+host ip 10..0.0.1
+host ip .0.0.1
+host ip +10.0.0.1
+host ip 256.0.0.1
+host ip 10.0.0
+host ip 10.0.0.1.
+host ip \u002010.0.0.1
+host ip 10.0.0.1\u0020
+host ip abc
+host ip 
+host ip 0.0.0.0
+host ip 1.2.3.4.5
+host ip \u0661\u0660.0.0.1
+host ip 10.0.0.-1
+host ip -0.0.0.1
+host ip 255.255.255.255
+host mask 255.255.0.0
+host mask 255.0.255.0
+host mask 0.0.0.0
+host mask 255.255.255.255
+host mask 256.0.0.0
+host mask 
+host mask 255.255.255
+host mask 0255.255.0.0
+host mask 1.2.3.4
+host mask 255..255.0.0
+host gateway 
+host gateway \u0020\u0020\u0020
+host gateway 192.168.0.1
+host gateway 192.168.0.256
+host gateway abc
+host gateway \u0020192.168.0.1
+host gateway 192.168..1.1
+host gateway 0.0.0.0
+host dns 
+host dns 8.8.8.8
+host dns 8.8.8
+host dns \u0020
+host dns 08.8.8.8
+switch name S1
+switch name 
+switch ssid Schule
+switch ssid 
+switch ssid \u0020
+switch ssid a b
+switch ssid \u00c4
+switch ssid ~
+switch ssid \u007f
+switch ssid \u0020lead
+switch retention 60
+switch retention 0
+switch retention 
+switch retention -5
+switch retention abc
+switch retention 1.5
+switch retention 007
+switch retention 99999999999999999999
+switch retention \u0663
+switch retention \u002060
+modem name M
+modem name 
+modem port 12345
+modem port 0
+modem port 65535
+modem port 65536
+modem port -1
+modem port abc
+modem port 
+modem port 080
+modem port \u002080
+modem port 80