Wi-Fi Tools: scan logging to CSV, plus sort and filter

- lib/wifi (host-tested): scan_log (CSV field quoting, header/row, a
  once-per-interval throttle) and network_list_view (sort by signal /
  channel / name, filter open-only / hide-hidden / strong-only)
- ScanEntry moved to lib/wifi so both are testable on the PC
- Wi-Fi Tools networks view: s sort, o/h/w filters, l toggles logging
  to /wifi/scans/<date>.csv (header + one row per AP per logged scan,
  throttled 30 s, needs the clock for timestamps); foreground-only
- Wi-Fi scan logs replace probe-request logs as a clean-up category
- Serial: cat <path>, and key <char> injects a character

Verified on the device: CSV written with header, timestamps, BSSID,
channel, RSSI, security and SSID; hidden networks marked.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT

src/apps/wifi_tools_app.h

@@ -5,17 +5,23 @@
 
 #include "app.h"
 #include "list_model.h"
+#include "network_list_view.h"
+#include "scan_log.h"
+#include "services/clock_service.h"
+#include "services/storage_service.h"
 #include "services/wifi_service.h"
 #include "signal_tracker.h"
 #include "ui/theme.h"
 
 namespace roro {
 
-// Wi-Fi diagnostics from ordinary scans: nearby access points, how crowded each channel is, and
-// a signal tracker for finding one access point. None of it interrupts the connection or IRC.
+// Wi-Fi diagnostics from ordinary scans: nearby access points (sortable, filterable, optionally
+// logged to CSV), how crowded each channel is, and a signal tracker. None of it interrupts the
+// connection or IRC, and none of it captures anyone's traffic.
 class WifiToolsApp : public App {
    public:
-    explicit WifiToolsApp(WifiService& wifi) : wifi_(wifi) {}
+    WifiToolsApp(WifiService& wifi, StorageService& storage, ClockService& clock)
+        : wifi_(wifi), storage_(storage), clock_(clock) {}
     void onEnter() override;
     void onExit() override;
     bool onKey(const KeyEvent& e) override;
@@ -26,18 +32,30 @@ class WifiToolsApp : public App {
     enum class View { Menu, Networks, Channels, Tracker };
 
     void open(View v);
+    void refreshOrder();
+    void logScan(uint32_t nowMs);
     void drawNetworks(Canvas& c);
     void drawChannels(Canvas& c);
     void drawTracker(Canvas& c);
-    std::vector<ScanEntry> sortedScan() const;
 
     WifiService& wifi_;
+    StorageService& storage_;
+    ClockService& clock_;
     View view_ = View::Menu;
     ListModel menu_{theme::kContent.h / theme::kLineHeight};
-    ListModel networks_{theme::kContent.h / theme::kLineHeight};
+    ListModel networks_{(theme::kContent.h - 14) / theme::kLineHeight};
+    std::vector<int> order_;  // indices into the scan, after sort and filter
+    WifiSort sort_ = WifiSort::Signal;
+    NetworkFilter filter_;
     uint32_t seenSeq_ = 0;
     uint32_t nextScanMs_ = 0;
 
+    // Scan logging
+    bool logging_ = false;
+    ScanLogThrottle logThrottle_{30000};
+    std::string headerDate_;
+    uint32_t loggedRows_ = 0;
+
     // Tracker
     std::string targetBssid_, targetName_;
     int targetChannel_ = 0;