feat(telegram): optional resume (#104)

docs/transports/telegram.md

@@ -48,6 +48,7 @@ line. If you want auto-resume without replies, enable chat sessions.
 Configuration (under `[transports.telegram]`):
 
 ```toml
+show_resume_line = true # set false to hide resume lines
 session_mode = "chat" # or "stateless"
 ```
 
@@ -59,6 +60,10 @@ Behavior:
 
 State is stored in `telegram_chat_sessions_state.json` alongside the config file.
 
+Set `show_resume_line = false` to hide resume lines when takopi can auto-resume
+(topics or chat sessions) and a project context is resolved. Otherwise the resume
+line stays visible so reply-to-continue still works.
+
 ## Message overflow
 
 By default, takopi trims long final responses to ~3500 characters to stay under
@@ -84,7 +89,6 @@ Configuration (under `[transports.telegram]`):
 [transports.telegram.topics]
 enabled = true
 scope = "auto" # auto | main | projects | all
-show_resume_line = true
 ```
 
 Requirements:
@@ -96,10 +100,6 @@ Requirements:
 - `auto`: if any project chats are configured, uses `projects`; otherwise `main`.
 - The bot needs the **Manage Topics** permission in the relevant chat(s).
 
-Optional:
-
-- `show_resume_line`: set `false` to hide the resume command line in topic threads.
-
 Commands:
 
 - `main`: `/topic <project> @branch` creates a topic in the main chat and binds it.

docs/user-guide.md

@@ -39,6 +39,8 @@ To continue a session:
 - **Chat sessions** (optional) store one resume token per chat (per sender in groups) so new messages
   auto-resume without replying. Enable with `session_mode = "chat"` and reset with `/new`.
   State is stored in `telegram_chat_sessions_state.json`.
+  You can hide resume lines by setting `[transports.telegram].show_resume_line = false`
+  when auto-resume is available and a project context is resolved.
 
 Reply-to-continue always works, even if chat sessions or topics are enabled.
 
@@ -262,7 +264,6 @@ Topics bind Telegram forum threads to specific project/branch contexts. They als
 ```toml
 [transports.telegram.topics]
 enabled = true
-# show_resume_line = false
 ```
 
 Your bot needs **Manage Topics** permission in the group.
@@ -270,8 +271,6 @@ Your bot needs **Manage Topics** permission in the group.
 If any `projects.<alias>.chat_id` are configured, topics are managed in those
 project chats; otherwise topics are managed in the main chat.
 
-Set `show_resume_line = false` to hide the resume command line in topic threads.
-
 ### Topic behavior
 
 ```
@@ -321,10 +320,10 @@ In project chats, omit the project: `/topic @branch` or `/ctx set @branch`.
 ```toml
 [transports.telegram]
 chat_id = -1001234567890
+# show_resume_line = false
 
 [transports.telegram.topics]
 enabled = true
-# show_resume_line = false
 ```
 
 **Project chats:**
@@ -332,10 +331,10 @@ enabled = true
 ```toml
 [transports.telegram]
 chat_id = 123456789   # main chat (private, for non-project messages)
+# show_resume_line = false
 
 [transports.telegram.topics]
 enabled = true
-# show_resume_line = false
 
 [projects.takopi]
 path = "~/dev/takopi"
@@ -448,6 +447,7 @@ chat_id = 123456789
 voice_transcription = true
 voice_transcription_model = "gpt-4o-mini-transcribe"
 session_mode = "stateless" # or "chat" for auto-resume per chat
+show_resume_line = true
 
 [transports.telegram.files]
 enabled = true
@@ -460,7 +460,6 @@ deny_globs = [".git/**", ".env", ".envrc", "**/*.pem", "**/.ssh/**"]
 [transports.telegram.topics]
 enabled = true
 scope = "auto"
-show_resume_line = true
 
 # Project definitions
 [projects.takopi]