Add token expiry, edit notice, log allowlist, local-zone test; merge PLAN.md into SPECS.md

get_logs needs a unit from an allowlist (router-*, kea, unbound, networkd,
nftables, ddclient, acme, sshd, kernel). API tokens are valid for 1, 7, 30
(default) or 90 days, or without limit. The overview and the Changes page
say which token made the unapplied changes.

options.json (router://options) no longer holds the options' source paths:
they differ between builds of a release, so a router rebuilding itself
offline had to build the file and failed (found by the update test).

Web UI: panels flow into columns on wide screens and the width is no longer
capped; on phones the navigation is a menu button; the Advanced page uses
panels; VLAN dropdowns show their chosen names; the duplicate WireGuard
heading is gone.

basic: a subtest for wan -> local rules.

SPECS.md is now the only document (decisions, how each part works, and what
is not done yet); PLAN.md is gone.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AeFqV9dZrK6nipHkPfyM4F

pkgs/router-webui/templates/network.html

@@ -63,7 +63,7 @@
     <legend>Uplink (WAN)</legend>
     <label>Interface
       <select name="wan.interface">{{$wan := .Form.WAN.Interface}}
-        {{range choices $.Data.Devices $wan}}<option value="{{.}}" {{if eq . $wan}}selected{{end}}>{{.}}</option>{{end}}
+        {{range choices $.Data.Devices $wan}}<option value="{{.}}" {{if eq . $wan}}selected{{end}}>{{devLabel $.Data.Devices .}}</option>{{end}}
       </select>
     </label>
     {{with index $e "wan.interface"}}<span class="field-error">{{.}}</span>{{end}}
@@ -95,7 +95,7 @@
         <td><input name="lan.{{$i}}.name" value="{{$l.Name}}" size="8" placeholder="new"></td>
         <td><select name="lan.{{$i}}.interface">{{$cur := $l.Interface}}
           {{if not $cur}}<option value="" selected></option>{{end}}
-          {{range choices $.Data.Devices $cur}}<option value="{{.}}" {{if eq . $cur}}selected{{end}}>{{.}}</option>{{end}}
+          {{range choices $.Data.Devices $cur}}<option value="{{.}}" {{if eq . $cur}}selected{{end}}>{{devLabel $.Data.Devices .}}</option>{{end}}
         </select></td>
         <td><input name="lan.{{$i}}.address" value="{{$l.Address}}" size="13"></td>
         <td><input name="lan.{{$i}}.prefix" value="{{$l.Prefix}}" size="2" inputmode="numeric" placeholder="24"></td>