fix: telegram draft chunking defaults (#667) (thanks @rubyrunsstuff)

docs/concepts/streaming.md

@@ -100,6 +100,7 @@ Telegram is the only provider with draft streaming:
   - `partial`: draft updates with the latest stream text.
   - `block`: draft updates in chunked blocks (same chunker rules).
   - `off`: no draft streaming.
+- Draft chunk config (only for `streamMode: "block"`): `telegram.draftChunk` (defaults: `minChars: 200`, `maxChars: 800`).
 - Draft streaming is separate from block streaming; block replies are off by default and only enabled by `*.blockStreaming: true` on non-Telegram providers.
 - Final reply is still a normal message.
 - `/reasoning stream` writes reasoning into the draft bubble (Telegram only).

docs/gateway/configuration.md

@@ -676,6 +676,11 @@ Multi-account support lives under `telegram.accounts` (see the multi-account sec
     },
     replyToMode: "first",                 // off | first | all
     streamMode: "partial",               // off | partial | block (draft streaming; separate from block streaming)
+    draftChunk: {                        // optional; only for streamMode=block
+      minChars: 200,
+      maxChars: 800,
+      breakPreference: "paragraph"       // paragraph | newline | sentence
+    },
     actions: { reactions: true, sendMessage: true }, // tool action gates (false disables)
     mediaMaxMb: 5,
     retry: {                             // outbound retry policy

docs/providers/telegram.md

@@ -209,6 +209,9 @@ Config:
   - `partial`: update the draft bubble with the latest streaming text.
   - `block`: update the draft bubble in larger blocks (chunked).
   - `off`: disable draft streaming.
+- Optional (only for `streamMode: "block"`):
+  - `telegram.draftChunk: { minChars?, maxChars?, breakPreference? }`
+    - defaults: `minChars: 200`, `maxChars: 800`, `breakPreference: "paragraph"` (clamped to `telegram.textChunkLimit`).
 
 Note: draft streaming is separate from **block streaming** (provider messages).
 Block streaming is off by default and requires `telegram.blockStreaming: true`