Add band-aware saved WiFi profile management

[p-keminer]

Stack

• Draft follow-up to Redact credentials from serial output #1435.
• Until Redact credentials from serial output #1435 merges, this comparison also contains its serial-redaction commit; the intended review delta is the final profile-management commit.

Summary

• persist multiple saved WiFi profiles and select them from the GUI
• distinguish same-name networks by 2.4/5-GHz band and replace credentials within the matching band
• support join, forget, reset, migration metadata, and targeted BSSID/channel joins

Testing

• Focused ESP32-C5 tests covered two profiles sharing an SSID across 2.4/5 GHz, targeted joins to both bands, reboot persistence, same-band password replacement without duplication, per-profile forget/reset, and protected internal SD metadata.

Limitations

• Legacy-profile migration was not separately marked complete; without SD the legacy single-profile fallback remains. Stored passwords are not encrypted by this PR.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1744 lines in your changes missing coverage. Please review.
✅ Project coverage is 0.36%. Comparing base (66f3c81) to head (5db9071).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
esp32_marauder/WiFiProfileStore.cpp	0.00%	1008 Missing ⚠️
esp32_marauder/MenuFunctions.cpp	0.00%	363 Missing ⚠️
esp32_marauder/WiFiScan.cpp	0.00%	223 Missing ⚠️
esp32_marauder/settings.cpp	0.00%	107 Missing ⚠️
esp32_marauder/CommandLine.cpp	0.00%	43 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #1443      +/-   ##
==========================================
- Coverage     0.40%   0.36%   -0.04%     
==========================================
  Files           20      21       +1     
  Lines        17176   18773    +1597     
  Branches        11      11              
==========================================
  Hits            69      69              
- Misses       17103   18700    +1597     
  Partials         4       4              

Flag	Coverage Δ
firmware-unit-tests	0.36% <0.00%> (-0.04%)	⬇️

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[Copilot]

Pull request overview

This PR adds multi-profile, band-aware WiFi credential management (supporting the same SSID on different bands) and updates the UI/CLI connection flows and serial logging to better protect secrets while joining/forgetting/resetting saved networks.

Changes:

• Introduces WiFiProfileStore to persist multiple WiFi profiles (SSID + band/channel) and manage lifecycle operations (remember/forget/reset/migration).
• Extends WiFiScan::joinWiFi() to support targeted joins via channel/BSSID and preferred band selection, and persists credentials via both legacy settings and the profile store.
• Updates GUI menus and CLI join command to select/join saved profiles (including hidden SSID handling) and redact sensitive values in serial output.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
esp32_marauder/WiFiScan.h	Extends joinWiFi API to accept channel/BSSID/preferred band parameters.
esp32_marauder/WiFiScan.cpp	Implements band-aware/targeted join behavior, credential persistence to the new store, and additional UI acknowledgement flows.
esp32_marauder/WiFiProfileStore.h	Adds the public interface and data structures for multi-profile WiFi storage.
esp32_marauder/WiFiProfileStore.cpp	Implements profile persistence, recovery/upgrade logic, and legacy migration handling.
esp32_marauder/settings.h	Adds saveWiFiCredentials() API for updating legacy stored SSID/password together.
esp32_marauder/settings.cpp	Adds settings generation recovery logic and redacts sensitive settings when printing diagnostics.
esp32_marauder/MenuFunctions.h	Adds menus/helpers for saved profile selection, forget/reset confirmation, and hidden SSID prompting.
esp32_marauder/MenuFunctions.cpp	Implements saved WiFi profile UI flows and redacts passwords in join diagnostics.
esp32_marauder/esp32_marauder.ino	Initializes the WiFi profile store during boot after SD setup.
esp32_marauder/CommandLine.h	Updates join command help text to include -e for hidden SSIDs.
esp32_marauder/CommandLine.cpp	Redacts join passwords in logged commands and supports hidden SSID joins via -e.

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[p-keminer]

All 22 firmware matrix builds and the Native Unity tests pass on this head. The remaining red statuses are limited to the repository-wide Codecov policy addressed separately in #1448.