Add speech-first diff review mode with navigation and tests

config/keyboard/desktop.conf

@@ -83,6 +83,7 @@ KEY_FENRIR,KEY_CTRL,KEY_P=toggle_punctuation_level
 KEY_FENRIR,KEY_RIGHTBRACE=toggle_auto_spell_check
 KEY_FENRIR,KEY_BACKSLASH=toggle_output
 KEY_FENRIR,KEY_CTRL,KEY_E=toggle_emoticons
+KEY_FENRIR,KEY_CTRL,KEY_D=toggle_diff_mode
 KEY_FENRIR,KEY_CTRL,KEY_SHIFT,KEY_E=cycle_key_echo
 key_FENRIR,KEY_KPENTER=toggle_auto_read
 KEY_FENRIR,KEY_CTRL,KEY_T=toggle_auto_time

config/keyboard/laptop.conf

@@ -81,6 +81,7 @@ KEY_FENRIR,KEY_SHIFT,KEY_CTRL,KEY_P=toggle_punctuation_level
 KEY_FENRIR,KEY_RIGHTBRACE=toggle_auto_spell_check
 KEY_FENRIR,KEY_CTRL,KEY_SHIFT,KEY_ENTER=toggle_output
 KEY_FENRIR,KEY_SHIFT,KEY_E=toggle_emoticons
+KEY_FENRIR,KEY_CTRL,KEY_D=toggle_diff_mode
 KEY_FENRIR,KEY_CTRL,KEY_SHIFT,KEY_E=cycle_key_echo
 KEY_FENRIR,KEY_CTRL,KEY_T=toggle_auto_time
 KEY_FENRIR,KEY_Y=toggle_highlight_tracking

config/settings/settings.conf

@@ -226,6 +226,15 @@ has_attributes=True
 # Shell to use for PTY emulation mode (empty = use system default shell)
 # Examples: /bin/bash, /bin/zsh, /usr/bin/fish
 shell=
+# Diff review presentation mode:
+# speech = spoken feedback only
+# sound = sound cues only (falls back to speech when cue is unavailable)
+# both = speech and sound cues
+diff_presentation=both
+# Diff review verbosity:
+# compact = concise role/location feedback
+# verbose = include diff line content during navigation
+diff_verbosity=compact
 
 [focus]
 # Follow and announce text cursor position changes