fix: refine access point copy and remove undeploy state warning

[RiskeyL]

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Summary

Copy refinements for the Access Point page and undeploy dialog of app deployment v2 (#39829), following product review.

• The API and Web App card subtitles narrowed the capability: "call the app" reads as invocation only, though the Service API also serves logs, parameters, and conversation endpoints; "share with your end users" covers neither self-use nor internal users.
• The trigger card mirrors workflow content rather than acting as a channel you toggle, so its subtitle now identifies the list itself (trigger nodes in the running version); the functional pitch stays in the empty state, which shortens to the action alone.
• The trigger exclusivity notice previously contradicted the canvas when unpublished changes removed the trigger. "The running version" resolves correctly on every tab (published version for Built-in, deployed version for environments), and "unavailable" matches the badge shown on the affected cards.
• The undeploy dialog's second paragraph narrated an internal state ("enter the undeploying state"); the first paragraph already states every user-visible consequence, so the warning is removed (component, spec, and all locale files).

Key	Before	After
studio.accessPoint.apiDescription	Call the app from your services over HTTP	Integrate the app into your services over HTTP
studio.accessPoint.webAppDescription	Share the app with your end users as a web page	Use the app through a hosted web page
studio.accessPoint.triggerDescription	Run the workflow on schedules or external events	Trigger nodes in the running version
studio.accessPoint.triggerExclusiveNotice	Web app, API, and MCP are turned off while the workflow uses triggers.	Web app, API access, and MCP server are unavailable while triggers are used in the running version.
overview.triggerInfo.triggerStatusDescription	Triggers appear here after you publish the version that contains them.	Triggers appear here after you publish.
deployTab.undeployConfirmWarning	After confirmation, this environment will enter the undeploying state and actions will be temporarily disabled.	(removed)

zh-Hans and ja-JP are updated by hand in this PR; remaining locales carry only the key removal and follow the i18n sync.

Screenshots

Before	After
...	...

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran make lint && make type-check (backend) and vp staged (frontend) to appease the lint gods

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.75%. Comparing base (5ef8bec) to head (c095886).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #40886      +/-   ##
==========================================
- Coverage   86.76%   86.75%   -0.01%     
==========================================
  Files        5204     5204              
  Lines      292478   292477       -1     
  Branches    58181    58181              
==========================================
- Hits       253755   253747       -8     
- Misses      33726    33733       +7     
  Partials     4997     4997              

Flag	Coverage Δ
dify-ui	93.45% <ø> (ø)
web	86.67% <ø> (-0.01%)	⬇️

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