Add Slack Voice Operator — LLM-summarised channels, @mention daemon, voice send

[hassan1731996]

What this adds

A voice-first Slack companion that goes beyond raw message reading with three differentiators:

1. LLM summarisation — channel activity condensed to 2–3 sentences focused on decisions, blockers, and action items — never a raw dump
2. Background @mention daemon — polls every 10 minutes, interrupts only when there are new @mentions, urgency-scored (HIGH/MEDIUM/LOW), batched into one spoken alert
3. Natural resolution — "message Jake" or "summarise my product channel" works via fuzzy match + LLM fallback; no exact handle required

Intents

Intent	Example
MENTIONS	"any mentions?" / "did anyone ping me?"
SUMMARY	"what's happening in #engineering?"
SEND	"message Jake: I'll be 5 minutes late"
CHANNELS	"list my Slack channels"
SETUP	first run / "change my Slack settings"

SDK patterns applied

• Platform profile (user_profile.md / user_summary.md) read first for user name; only asks if empty
• Passive data capture: SEND extracts recipient + message in one LLM call; single follow-up only if both fields are missing
• EXIT_WORDS = standalone tokens only; EXIT_PHRASES for multi-word exits
• Storage upsert: create_key first → fallback update_key
• Background daemon: background_daemon_mode set before CapabilityWorker
• resume_normal_flow() in finally on foreground; at top of watch_loop() in daemon
• All API calls via get_api_keys("slack_bot_token") — no hardcoded credentials

Setup required

User creates a Slack app, adds scopes (channels:history, channels:read, groups:history, groups:read, im:history, im:read, chat:write, users:read), installs to workspace, and saves the bot token in OpenHome settings as slack_bot_token. First-voice-run setup resolves their Slack User ID by display name (fully voice-native, no copy-pasting IDs).

Validation

✅ All checks passed!

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🔀 Branch Merge Check

PR direction: feature/slack-voice-operator → dev

✅ Passed — feature/slack-voice-operator → dev is a valid merge direction

[github-actions]

✅ Community PR Path Check — Passed

All changed files are inside the community/ folder. Looks good!

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✅ Ability Validation Passed

📋 Validating: community/slack-voice-operator
  ✅ All checks passed!

[github-actions]

🔍 Lint Results

🔧 Formatting fixes available

This PR is from a fork, so fixes could not be pushed automatically. Download the python-lint-results artifact from the workflow run for the patch file, then run:

git apply autofix.patch

✅ __init__.py — Empty as expected

Files linted: community/slack-voice-operator/background.py community/slack-voice-operator/main.py

✅ Flake8 — Passed

✅ All checks passed!