feat(bot): add /session_delete command with two-stage confirmation flow

[georgernstgraf]

Closes #81

What

Adds a /session_delete command that lets users delete OpenCode sessions directly from Telegram.

Flow

1. /session_delete → paginated session list as inline keyboard
2. Click a session → detail view with session info + [Delete] [Cancel]
3. Delete → calls opencodeClient.session.delete(), clears interaction

If the deleted session is the currently active one, the session state is reset and the user is prompted to use /sessions or /new.

Implementation

• Follows existing /tasklist command pattern (two-stage custom interaction)
• Reuses pagination logic from /sessions command
• Full i18n coverage: en, de, ru, es, fr, zh

[Copilot]

Pull request overview

Adds a new Telegram bot command /session_delete to delete OpenCode sessions via an inline, two-step confirmation UI, with i18n strings added across supported locales.

Changes:

• Register new /session_delete command and callback handler in the bot router.
• Implement src/bot/commands/session-delete.ts with paginated session list → details → confirm delete flow.
• Add i18n keys for the new command and flow messages (en, de, es, fr, ru, zh).

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/bot/index.ts	Wires /session_delete command + callback dispatch logging/handling.
src/bot/commands/definitions.ts	Adds /session_delete to the bot command list for Telegram.
src/bot/commands/session-delete.ts	Implements the session deletion interaction flow (list/details/confirm + pagination).
src/i18n/en.ts	Adds English strings for the session delete flow.
src/i18n/de.ts	Adds German strings for the session delete flow.
src/i18n/es.ts	Adds Spanish strings for the session delete flow.
src/i18n/fr.ts	Adds French strings for the session delete flow.
src/i18n/ru.ts	Adds Russian strings for the session delete flow.
src/i18n/zh.ts	Adds Chinese strings for the session delete flow.

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[georgernstgraf]

This is a simple implementation. I considered modifying the /sessions command directly, but that would have been more complicated and perhaps less intuitive for the user than this quick solution.

[georgernstgraf]

I am still not sure if this should be merged. The / menu is already crowded and it is sooo easy to ssh into the machine and do <ctrl-d> to clean up ..

An alternative would be: find out if its possible to add a trash icon to each listed session and thus give the user the possiblity to delete a session. But then the confirmation dialog would be challenging, or we would skip it in this case ..

Good we have a maintainer to decide ;)

worked with it a couple of days ... it's actually nice.

[grinev]

I will look an this, but I have in plans another implementation, something like this: when you choose session you see buttions: switch, rename, delete, cancel.

[georgernstgraf]

I will look an this, but I have in plans another implementation, something like this: when you choose session you see buttions: switch, rename, delete, cancel.

That might be the better idea. BUT: the session-change workflow will involve one user-tap extra.

BTW: anomalyco/opencode#25009