feat(admin): typed Radio/Routing field editors; pre-release audit fixes

Tools > Admin: split the Radio tab's single "f,bw,sf,cr" comma-string
field (free-text keyboard) into 4 independent, type-appropriate rows --
Frequency (same digit-cursor DigitEditor Settings/Repeater use locally),
Bandwidth/Spreading factor/Coding rate (discrete-set LEFT/RIGHT stepping),
plus TX power and the 3 Routing numeric fields as number steppers and
Repeat as an ON/OFF toggle. Edits happen locally (zero mesh traffic per
keystroke); only Enter sends one combined `set`, Cancel sends nothing.

Full pre-release audit of all 16 commits since v1.22 (5 parallel focus
areas: display/font, keyboard/messages, Nodes/Admin, Bot/channels,
UITask+NodePrefs schema) turned up and fixed:

- Admin: fetched FK_NUMBER values weren't clamped to the field's range,
  so a value already out-of-range could get stuck unreachable; fixed
  commit-time float format noise (%.6f -> %.3f); Cancel/failed-login
  always returned to the Nodes picker even when Admin was opened
  directly from a node's Hold-Enter action -- now returns to wherever
  it was actually opened from (AdminScreen::_from_picker).
- Keyboard: one-shot Shift was consumed after the *first* T9 multi-tap,
  so cycling to the 2nd/3rd candidate always came out lowercase --
  fixed by caching the cycle's caps state (t9_caps).
- Messages: history is numbered newest-first, so a message arriving
  while scrolled up to an older one silently relabeled the view onto a
  different message -- selection now shifts with the insert.
- Channels: onChannelRemoved() didn't clear ch_notif_override/
  ch_notif_muted/ch_fav_bitmask despite its own contract comment
  requiring it (now far more reachable via the on-device Delete);
  an all-zero hex secret silently self-deleted the channel it was
  just saved into (collides with the empty-slot sentinel) -- rejected.
- Room login: isRoomLoggedIn() indexed the login-tracking ring
  directly instead of via its head offset, silently wrong once the
  ring wraps (8+ rooms/session) -- the new on-device Logout depends
  on this being right.
- Font/display: removed the now fully-inert Settings > Display > Font
  toggle and the dead LemonFont.h (retired by the earlier misc-fixed
  font unification, zero remaining includes); fixed a copy-pasted
  "5x7" comment (font is 6x9), two meaningless dead ternaries, and an
  OLED/e-ink inconsistency in the undefined-glyph fallback box offset.
- AdminField's `kind`/bounds fields no longer rely on default member
  initializers inside aggregate-init: this toolchain's actual nRF52
  build (unlike env:native) has no explicit -std= override, so it
  predates C++14's aggregate-with-default-member-initializer rule.
  Given an explicit constructor instead -- portable regardless of
  standard, all existing field-table literals unchanged.

Docs updated to match: tools_screen.md (Diagnostics as a 3-tab
carousel, was documented as one flat screen), message_screen.md
(chat bubbles, newest-at-bottom, cursor mode, secret validation),
settings_screen.md (dropped the dead Font row), solo_ui_framework.md
(header menu_hint signatures, icon priority-drop, KeyboardWidget's
T9/alphabets/cursor-mode). release-notes.md gains the v1.23 section
covering all of the above plus the other 15 commits since v1.22.

Build-verified on WioTrackerL1_companion_solo_dual.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

examples/companion_radio/ui-new/KeyboardWidget.h

@@ -45,8 +45,9 @@ static const char* const KB_T9_GROUPS[KB_PAGES][9] = {
 
 // Additional (non-Latin) keyboard alphabets — NodePrefs::keyboard_alt_alphabet
 // picks which one (if any) joins the Latin/symbols page cycle. Every alphabet
-// here must fall inside Lemon's U+0020-04FF range (src/helpers/ui/LemonFont.h)
-// since that's what actually draws these glyphs on-screen.
+// here must fall inside the misc-fixed font's U+0020-04FF range
+// (src/helpers/ui/MiscFixedFont.h) since that's what actually draws these
+// glyphs on-screen.
 //
 // Unlike KB_CHARS (single ASCII byte per cell), these hold UTF-8 strings —
 // Cyrillic is 2 bytes/codepoint — so cells are `const char*`, not `char`.
@@ -363,6 +364,12 @@ struct KeyboardWidget {
   int      t9_cell = -1;
   int      t9_cycle = 0;
   uint32_t t9_last_ms = 0;
+  // Caps state the *first* tap of the current T9 cycle applied -- reused by every
+  // later cycling tap on the same cell, since one-shot Shift is consumed (see
+  // below) right after that first tap, before the user has settled on a letter.
+  // Without this, cycling to the 2nd/3rd/... candidate would always render
+  // lowercase regardless of Shift.
+  bool     t9_caps = false;
 
   int gridRows() const { return isT9() ? KB_T9_ROWS : KB_ROWS_CHAR; }
   int gridCols() const { return isT9() ? KB_T9_COLS : KB_COLS_CHAR; }
@@ -765,7 +772,7 @@ struct KeyboardWidget {
             if (t9_cycle < glen) kbUtf8CharAt(group, t9_cycle, one);
             else { one[0] = (char)('1' + cell); one[1] = '\0'; }
             char shown[5];
-            kbApplyCapsUtf8(one, caps, shown, sizeof(shown));
+            kbApplyCapsUtf8(one, t9_caps, shown, sizeof(shown));
             // Replace the codepoint just before the cursor (what the previous
             // tap inserted), preserving anything after the cursor too.
             int old_n = kbUtf8LastCharBytes(buf, cursor_pos);
@@ -793,6 +800,7 @@ struct KeyboardWidget {
             buf[len] = '\0';
             t9_cell = cell;
             t9_cycle = 0;
+            t9_caps = caps;   // remember it for every later cycling tap on this cell
             if (caps && !caps_lock) caps = false;   // one-shot: only this first tap gets capitalised
           }
         }