`gmail send` doesn't include display name in From header

[neist]

When sending an email via gog gmail send, the From header only contains the email address, not the display name configured in the send-as alias. This happens both when using the default send-as address and when explicitly specifying --from.

Steps to reproduce

1. Configure a display name for a send-as alias:

   gog gmail settings sendas update user@example.com --display-name "John Doe"

2. Verify it's set:

   gog gmail settings sendas get user@example.com
   # Shows: display_name  John Doe

3. Send an email (either way):

   # Using default send-as
   gog gmail send --to recipient@example.com --subject "Test" --body "Hello"
   
   # Or explicitly specifying --from
   gog gmail send --to recipient@example.com --subject "Test" --body "Hello" --from user@example.com

4. Check the raw message headers:

   From: user@example.com
   

Expected behavior

The From header should include the display name from the send-as alias:

From: John Doe <user@example.com>

Actual behavior

Only the email address is included, display name is omitted.

Version

v0.8.0 (4f2b12e 2026-01-19T02:32:15Z)

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Opened by Shadow (assistant) on behalf of @neist

[neist]

This may be related to or a duplicate of #78