improved completion

AGENTS.md

@@ -61,7 +61,7 @@ Last verified state (all green, `./jaigradle check` and `verifyPlugin` too):
 ```text
 dev.hgh.HarnessSmokeTest                       tests=2
 dev.hgh.jai.JaiFileTypeTest                    tests=4
-dev.hgh.jai.completion.JaiCompletionTest      tests=6
+dev.hgh.jai.completion.JaiCompletionTest      tests=19
 dev.hgh.jai.editor.JaiEditorSupportTest       tests=7
 dev.hgh.jai.editor.JaiFoldingBuilderTest      tests=3
 dev.hgh.jai.findusages.JaiFindUsagesTest      tests=2
@@ -76,8 +76,8 @@ dev.hgh.jai.refactoring.JaiRenameTest          tests=3
 dev.hgh.jai.reference.JaiReferenceTest         tests=9
 dev.hgh.jai.structure.JaiStructureViewTest     tests=3
 dev.hgh.jai.settings.JaiProjectSettingsTest    tests=3
-dev.hgh.jai.settings.JaiConfiguredRootTest     tests=4
--> total 78, failures+errors 0
+dev.hgh.jai.settings.JaiConfiguredRootTest    tests=6
+-> total 93, failures+errors 0
 ```
 
 The corpus gates report what they actually did; check both lines are still there:
@@ -120,10 +120,10 @@ Tier 3: parsed 714 files, 714 clean (100.0%), 0 with errors, 0 PsiErrorElements
   `#import`/`#load` path references with standard go-to-definition resolution.
   Headless tests cover source-ordered declarations, nested structure members,
   folding ranges, local `#load`, and Jai module directories.
-- **Phase 5** — basic completion for keywords, directives, and module/file
-  paths; same-file and imported symbol navigation; rename; and find-usages for
-  declaration names. Symbol-aware identifier/member completion remains future
-  work.
+- **Phase 5** — completion for keywords, directives, module/file paths, visible
+  same-file or imported declarations, procedure parameters, and module aliases;
+  same-file and imported symbol navigation; rename; and find-usages for
+  declaration names. Struct-field completion remains future work.
 - **Phase 5a** — persistent project settings for Jai module/import roots,
   shared root-aware resolution and completion, and indexed external Jai library
   sources. Headless tests cover state round-tripping, the Settings panel,
@@ -190,11 +190,10 @@ Tier 3: parsed 714 files, 714 clean (100.0%), 0 with errors, 0 PsiErrorElements
 
 ### Known code-insight gaps
 
-- Completion currently offers keywords, compiler directives, and module/file
-  paths, but not declarations, imported symbols, parameters, struct fields, or
-  module-qualified members.
-- Module-qualified members, procedure parameters, and struct fields also do
-  not yet have symbol resolution.
+- Completion currently offers keywords, compiler directives, module/file paths,
+  visible same-file or imported declarations, procedure parameters, and members
+  of imported aliases, but not struct fields.
+- Struct fields do not yet have symbol resolution or completion.
 
 ### In progress — pick up here