whisrs: stream phrases sooner and type slower for TUIs

Streaming dictation only emits a phrase after phrase_silence_ms of
silence; the 400ms default stalled long continuous speech until the
20s force-split, which read as "the text cuts off". 250ms emits at
short breathing pauses instead.

key_delay_ms was the 2ms default, which drops characters in busy
Node/Ink TUIs like the pi chat while they are streaming output;
10ms keeps dictation readable there.

whisrs/config.toml

@@ -1,6 +1,11 @@
 [audio]
 device = "pipewire"
 
+[input]
+# pi's Ink TUI drops injected keystrokes while it is busy streaming output;
+# raise the inter-key delay so dictation survives that.
+key_delay_ms = 10
+
 [general]
 backend = "local-whisper"
 language = "en"
@@ -9,4 +14,5 @@ notify = true
 audio_feedback = true
 
 [local-whisper]
-model_path = "/home/jeena/.local/share/whisrs/models/ggml-base.en.bin"
+model_path = "/home/jeena/.local/share/whisrs/models/ggml-base.en.bin"
+phrase_silence_ms = 250