M1 step 3: Log writing and Storage Clean-up

- lib/storage_model (host-tested): FAT-safe names, daily Log paths,
  dates from Log/Capture file names, CleanupPlan by category and age,
  byte formatting
- StorageService does all card I/O on its task: queued Log lines are
  written in batches each second (dropped while Logs are paused),
  plus file listing and deletion jobs
- Settings > Storage moves into StoragePage: usage, Clean up
  (category, age with size preview, confirmation), Erase SD card
- Clock: local date for Log names
- Serial: log <text>, sd list

Verified on the device: lines land in /irc/dev/#test/2026-10-02.log
with folders created as needed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT

src/apps/settings_app.h

@@ -13,6 +13,7 @@
 #include "services/battery_service.h"
 #include "services/clock_service.h"
 #include "services/storage_service.h"
+#include "apps/storage_page.h"
 #include "apps/wifi_settings_page.h"
 #include "settings_menu.h"
 #include "ui/theme.h"
@@ -34,7 +35,10 @@ struct SettingsAppDeps {
 class SettingsApp : public App {
    public:
     explicit SettingsApp(const SettingsAppDeps& deps)
-        : d_(deps), menu_(deps.settings), wifiPage_(deps.settings, deps.savedNetworks, deps.wifi, deps.bus) {}
+        : d_(deps),
+          menu_(deps.settings),
+          wifiPage_(deps.settings, deps.savedNetworks, deps.wifi, deps.bus),
+          storagePage_(deps.storage, deps.clock, deps.bus) {}
     void onEnter() override;
     bool onKey(const KeyEvent& e) override;
     void update(uint32_t nowMs) override;
@@ -49,20 +53,18 @@ class SettingsApp : public App {
     bool onMenuKey(const KeyEvent& e);
     bool onTextKey(const KeyEvent& e);
     bool onChoiceKey(const KeyEvent& e);
-    bool onStorageKey(const KeyEvent& e);
     bool onAboutKey(const KeyEvent& e);
     void warn(const std::string& text);
-    std::vector<std::string> storageLines() const;
     std::vector<std::string> aboutLines() const;
 
     SettingsAppDeps d_;
     SettingsMenu menu_;
     WifiSettingsPage wifiPage_;
+    StoragePage storagePage_;
     Page page_ = Page::Menu;
     ListModel list_{theme::kContent.h / theme::kLineHeight};
     ListModel choices_{theme::kContent.h / theme::kLineHeight};
     LineEditor editor_{39};
-    std::unique_ptr<DialogModel> eraseDialog_;
     int editingRow_ = 0;
     uint32_t lastRefreshMs_ = 0;
 };