[WiFi] WiFi Settings Complete Support

[AustinChangLinksys]

[FW-WIFI] WiFi Settings Complete Support

Purpose: Enable complete WiFi settings functionality via USP/TR-181
Dependencies: Can work in parallel with other domains
Parent Tracker: #788

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🔴 P1 - Core WiFi Features

MAC Filtering Completely Unusable (#854)

• Problem: AllowedMACAddress.{i} multi-instance missing + no deny-list support
• Impact: MAC Filtering feature completely unusable
• Current: Returns flat string instead of multi-instance table

Guest Network Indistinguishable

• Problem: No field can distinguish Guest AP from Primary AP
• Impact: App can only rely on unreliable heuristic (SSID name contains "guest")
• Status: ✅ Resolved via feat: WiFi Advanced buffered save, unified Save UX, and guest detection improvement #828

WiFi Bandwidth Data Inconsistency (#853)

• Problem: Bandwidth data inconsistency between different TR-181 paths
• Impact: UI may display incorrect bandwidth information
• Status: ✅ Resolved (closed)

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🟡 P2 - Secondary WiFi Features

WiFi 6E/7 MLO (Multi-Link Operation) (#856)

• Problem: No TR-181 support for Multi-Link Operation
• Impact: Cannot utilize WiFi 6E/7 MLO capabilities
• Note: Requires hardware capability confirmation

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🔵 P3 - Lower Priority

Channel Width Grouping (#855)

• Problem: PossibleChannels returns flat list, no grouping by channel width
• Impact: Cannot determine which channels available at 40MHz/80MHz/160MHz
• Status: ✅ Resolved — Client-side implementation in PR feat: SSE reliability, WiFi advanced mode, demo mode & SelectAutoComplete migration #691

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🔗 Consolidates Previous Tracking

This tracker consolidates and replaces the following:

• [usp:investigation] WiFi Settings TR-181 Limitations (4 issues) #707: WiFi Settings TR-181 Limitations (4 issues) → CLOSED

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📊 Progress Tracking

P1 Core Features

• MAC Filtering Completely Unusable ([WiFi] MAC Filtering Completely Unusable — AllowedMACAddress.{i} Missing #854)
• Guest Network Indistinguishable (resolved via feat: WiFi Advanced buffered save, unified Save UX, and guest detection improvement #828)
• WiFi Bandwidth Data Inconsistency ([WiFi] WiFi Bandwidth Data Inconsistency #853) ✅ Resolved

P2 Secondary Features

• WiFi 6E/7 MLO ([WiFi] Advanced WiFi Settings Not Supported — MLO, Client Steering, Node Steering, IPTV #856)

P3 Optional Features

• Channel Width Grouping ([WiFi] Channel Width Grouping — Client-side Implementation Complete #855) — Client-side implementation complete

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🎯 Success Criteria

✅ Complete when:

• MAC Filtering functional with allow/deny lists
• Guest networks properly identifiable ✅
• WiFi bandwidth data consistent ✅
• WiFi 6E/7 MLO capabilities accessible
• Channel width grouping ✅ (client-side)

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Related: #788 (Master Tracker)
Replaces: #707 (WiFi TR-181 Limitations)
Independent: Can work in parallel with other domains

[AustinChangLinksys]

Regarding PR #829

FW-009: Guest Network Indistinguishable is resolved

Replace guest network SSID string matching (contains("guest")) with per-radio instance ordering (lowest index = Main, subsequent = Guest)