feat: message footer redesign — 📂 project indicator, ambient trigger emojis, drop 🏷

[nathanschram]

Summary

Redesign the message footer for clarity and space efficiency. Three changes:

1. Replace 🏷 dir: <project> with 📂 <project>

Before: 🏷 dir: claude-test | opus 4.6 (1M) · plan
After: 📂 claude-test | opus 4.6 (1M) · plan

• Drop the 🏷 (label) emoji — it's decorative with no semantic meaning
• Replace dir: text prefix with 📂 emoji — saves 5 characters, more scannable
• 📂 (open file folder, U+1F4C2) is universally recognised on all platforms
• When no project context exists (DM chats), the line starts with model info directly

2. Ambient trigger indicators on human-initiated runs

When a chat has active crons or webhooks, show bare emoji indicators in the footer even on normal (non-trigger) runs:

Human run in chat WITH crons: 📂 myapp | opus 4.6 (1M) · plan · ⏰
Human run in chat WITH webhooks: 📂 myapp | opus 4.6 (1M) · plan · ⚡
Human run in chat WITH both: 📂 myapp | opus 4.6 (1M) · plan · ⏰ ⚡
Trigger-initiated run (full label stays): 📂 myapp | codex-mini · ⏰ cron:daily-review
Webhook-initiated run: 📂 myapp | codex-mini · ⚡ webhook:github-push

The bare emoji signals "triggers are active here" without cluttering every message with labels. The full ⏰ cron:<id> / ⚡ webhook:<id> label is reserved for runs that were actually caused by a trigger.

3. Separate emojis for crons vs webhooks

• ⏰ = crons (time-based, scheduled)
• ⚡ = webhooks (event-based, on-demand)

These become the universal Untether emojis for these concepts — used consistently across /ping, footers, /config, and startup messages.

Implementation

Files to modify:

• src/untether/directives.py:150-151 — format_context_line(): change f"dir: {alias}" to f"📂 {alias}"
• src/untether/markdown.py:392 — _format_footer(): remove \N{LABEL} prefix, lead with context_line or meta_line directly
• src/untether/markdown.py:312-328 — format_meta_line(): add ambient trigger indicator logic (query TriggerManager for active crons/webhooks in the chat)
• src/untether/runner_bridge.py — pass chat_id context to ProgressTracker so it can query active triggers

Tests to update:

• test_meta_line.py — update 54 tests for new footer format
• test_exec_bridge.py — footer rendering tests

Related

• feat: trigger visibility — indicators, discovery, and run history #271 — trigger visibility (current ⏰ cron:<id> footer)
• feat: master trigger pause toggle in /config menu #294 — master trigger pause toggle