fix: prefill template fields with meta default on new ticket page

[RitvikSardana]

Template fields on the new ticket page were always initialized empty, ignoring the field's default set in meta (DocField / Custom Field / Property Setter).

• get_one API now returns default for each template field
• New ticket page prefills the field value with it

Test: set a default on an HD Ticket field via Customize Form, add it to the ticket template, open the new ticket page. The field comes prefilled.

🤖 Generated with Claude Code

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 71.61%. Comparing base (c037dcf) to head (5cd9b4c).
⚠️ Report is 145 commits behind head on develop.

Files with missing lines	Patch %	Lines
...elpdesk/helpdesk/doctype/hd_ticket_template/api.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3675      +/-   ##
===========================================
- Coverage    71.63%   71.61%   -0.02%     
===========================================
  Files          145      145              
  Lines        10106    10106              
===========================================
- Hits          7239     7237       -2     
- Misses        2867     2869       +2     

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[greptile-apps]

Confidence Score: 4/5

The Check-default normalization bug should be fixed before merging.

A raw Frappe default of "0" is truthy in JavaScript, so unchecked template fields render and submit as enabled.

Files Needing Attention: desk/src/pages/ticket/TicketNew.vue

_{Reviews (1): Last reviewed commit: "fix: prefill template fields with meta d..." | Re-trigger Greptile}

[greptile-apps]

Check defaults invert false values

When a Check field has Frappe's string default "0", this assignment preserves the nonempty string and UniInput treats it as truthy, causing an unchecked field to display “Yes” and submit the wrong value.

Knowledge Base Used: Helpdesk core doctypes: agents, teams, customers, knowledge base, and support config