docs + branding: offline-by-default, correct defaults, Dialtone naming

[jaylfc]

Brings docs and UI naming in line with the shipped features:

• README: adds the Offline by default note (local Ollama + local voice, no API keys except Twilio); corrects the documented backend default from auto to ollama (3 spots); fixes the config path (~/.hermes/phone-agent → ~/.hermes-phone); reflects the new dashboard (phone dialpad, light/dark).
• Branding: renames the user-facing Hermes Phone → Dialtone in the login page, transcript export, and menu bar app. Display strings only — ~/.hermes-phone install paths and com.hermes-phone.* service labels are unchanged (renaming those would orphan existing installs).
• LICENSE: Software: field → Dialtone.

30 tests pass; "Hermes Agent"/"Hermes Gateway" backend references intentionally kept.

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Run ID: 5ce06ba2-a81c-4f26-af13-4aaa3c839b61

📥 Commits

Reviewing files that changed from the base of the PR and between 5be1b84 and c3a0254.

📒 Files selected for processing (4)

• LICENSE
• README.md
• menubar.py
• server.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/refresh-features-branding

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