Add rule-based feedback tag ordering and usage tracking

[hoorak17]

Motivation

• Improve relevance of feedback tag suggestions by making them block-aware and prioritizing tags using title keyword rules and historical usage counts.

Description

• Add feedbackUsageCounts and a recordFeedbackUsage call from updateTodayFeedback to track tag selection frequency.
• Introduce keywordTagRules and change feedbackOptionsFor to accept a TimeBlock and produce an ordered List<String> that prioritizes keyword-matched tags, then frequently used tags, then the remaining base tags.
• Preserve and reuse consolidated tag lists (commonCauseTags, sleepSpecificTags, exerciseSpecificTags, studySpecificTags) and update the UI integration by changing HomeViewModel.feedbackOptionsFor and its use in HomeScreen to pass a TimeBlock instead of a Category.
• Ensure the final suggestion list deduplicates prioritized tags while keeping all base tags available.

Testing

• No automated tests were executed for this change.

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Codex Task

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Restore ETC feedback options

For Category.ETC, feedbackOptionsFor now returns only commonCauseTags (Category.ETC -> commonCauseTags). The previous ETC options (GOOD/OKAY/BAD/FAIL) are no longer part of any base tag list, so ETC blocks can no longer surface those generic sentiment tags in the suggestion sheet. If those tags are still expected for ETC blocks, they need to be added back to the ETC base list or a new ETC-specific list, otherwise this is a user-visible regression in available feedback choices.

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