📝 Update More API Document

docs/api/build-application-logger.md

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+---
+name: build-application-logger
+group: api
+category: facade
+update-time: 20260520
+description: Build the application-facing configured logger facade from a LoggerConfig.
+key-word:
+    - application
+    - facade
+    - logger
+    - public
+---
+
+## Build-application-logger
+
+Build an `ApplicationLogger` from `LoggerConfig`. This facade is the application-oriented sync entry point and currently aliases the configured runtime logger shape returned by `build_logger(...)`.
+
+### Interface
+
+```moonbit
+pub fn build_application_logger(config : LoggerConfig) -> ApplicationLogger {
+```
+
+#### input
+
+- `config : LoggerConfig` - Fully assembled sync logger config.
+
+#### output
+
+- `ApplicationLogger` - Application-facing configured runtime logger.
+
+### Explanation
+
+Detailed rules explaining key parameters and behaviors
+
+- This API delegates to `build_logger(...)`.
+- The returned value keeps the same public logging, queue, and file runtime helper surface as `ConfiguredLogger`.
+- Use this facade when application boot code wants an app-specific entry name without exposing lower-level builder naming in its own code.
+
+### How to Use
+
+Here are some specific examples provided.
+
+#### When Need An App-level Sync Builder Entry
+
+When boot code assembles config values before runtime construction:
+```moonbit
+let logger = build_application_logger(
+  LoggerConfig::new(target="app", sink=SinkConfig::new(kind=SinkKind::Console)),
+)
+```
+
+In this example, the application facade builds the same configured runtime logger shape as `build_logger(...)`.
+
+### Error Case
+
+e.g.:
+- If the config uses file output on a backend without native file support, backend runtime limitations still apply after construction.
+
+- If queueing is not configured, queue helper values simply reflect the non-queued runtime shape.
+
+### Notes
+
+1. This is a facade API, not a separate runtime implementation.
+
+2. Use `parse_and_build_application_logger(...)` when starting from JSON text.