fix(category-builder): support hosts with only Android/ScreenTime buckets

[ErikBjare]

The category builder unconditionally queried aw-watcher-window_<host> + aw-watcher-afk_<host>, so on aw-android it failed with:

BucketQueryError("Failed to query bucket: NoSuchBucket(\"aw-watcher-window_POCO F8 Ultra\")")

since the phone only has an aw-watcher-android_<host> bucket (same problem for iOS ScreenTime imports).

Changes:

• CategoryBuilder.fetchWords(): when the selected host has no window/AFK bucket pair but has an android-style bucket, query it via bid_android (resolving the actual bucket id from the buckets store, preferring the ScreenTime bucket when both exist — mirrors query_android in the activity store).
• findCommonPhrases(): fall back to data.app when data.title is missing — Android events carry only an app name (and the android query path merges by app), so the old code would have thrown on undefined.split.
• The "Show events" table likewise falls back to the app name.
• Added a unit test for the app-name fallback.

Reported by @ErikBjare while testing aw-android 0.14.0b1.

[ErikBjare]

@greptileai review

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 42.53%. Comparing base (266a714) to head (83aa9e4).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #932      +/-   ##
==========================================
+ Coverage   42.50%   42.53%   +0.02%     
==========================================
  Files          44       44              
  Lines        2416     2417       +1     
  Branches      518      490      -28     
==========================================
+ Hits         1027     1028       +1     
- Misses       1313     1368      +55     
+ Partials       76       21      -55     

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[greptile-apps]

Greptile Summary

The PR enables the category builder for Android-only and ScreenTime-only hosts while preserving the desktop window/AFK query path.

• Resolves Android-style bucket IDs from the buckets store, preferring ScreenTime imports.
• Falls back from event titles to app names when generating and displaying category suggestions.
• Adds unit coverage for app-only events.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete changed-code defect identified.

The Android bucket parameters match the canonical query contract, ScreenTime preference mirrors the established activity-store behavior, and app-only events are handled consistently by phrase extraction.

Important Files Changed

Filename	Overview
src/views/settings/CategoryBuilder.vue	Selects a real Android or preferred ScreenTime bucket when no desktop bucket pair exists and displays app names when titles are unavailable.
src/util/categorization.ts	Centralizes title-to-app fallback for both word and bigram extraction.
test/unit/categorization.test.node.ts	Verifies that durations are accumulated correctly for app-only Android events.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
  A[Category builder fetches words] --> B{Window and AFK buckets available?}
  B -->|Yes| C[Query desktop window and AFK buckets]
  B -->|No| D{Android or ScreenTime bucket available?}
  D -->|Yes| E[Prefer ScreenTime, otherwise Android bucket]
  D -->|No| C
  C --> F[Canonical events query]
  E --> F
  F --> G[Filter selected category]
  G --> H[Extract title or app text]
  H --> I[Generate common words and phrases]

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Fall back to the app when the title is empty

For an Android/ScreenTime event containing title: '' and a valid app, the nullish-coalescing expression selects the empty title, so the event contributes no words even though the event table displays its app via title || app. Treat an empty title as missing here as well; otherwise such app activity silently disappears from the category-builder suggestions.

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[ErikBjare]

Good catch — fixed in 83aa9e4 (switched to || and added an empty-title case to the test).