Add Rank Tracking metric filters and fix null-last sort ordering

[A-S-Manoj]

Closes #69

Changes

• Added min/max range filters for Volume, Keyword Difficulty, and CPC in the Rank Tracking filter panel, alongside the existing position filters.
• Fixed null-last sorting: the previous custom comparator returned a fixed +1/-1 to push nulls last, but TanStack Table negates the entire comparator result when sorting descending — so nulls ended up first instead of last in that direction. Switched to TanStack's built-in sortUndefined: "last" column option, which handles this independently of sort direction.
• Split RankTrackingFilters.tsx into a UI component file and a RankTrackingFilters.logic.ts file to stay under the project's file-length lint limit. The public import path (./RankTrackingFilters) is unchanged via a re-export, so no other files needed updates.

Testing

• pnpm ci:check passes locally
• pnpm test passes locally
• Added unit tests covering:
  • Metric range filtering (Volume, KD, CPC)
  • Null metric handling when filters are active
  • Zero-value edge cases (e.g. KD 0)

Greptile Summary

This PR adds metric filters and updates null-last sorting for rank tracking. The main changes are:

• Adds min/max filters for volume, keyword difficulty, and CPC.
• Moves rank-tracking filter logic into RankTrackingFilters.logic.ts while preserving the existing import path.
• Updates numeric columns to use sortUndefined: "last" so missing values stay last in both sort directions.
• Adds unit tests for metric range filtering, null metric handling, and zero-value cases.

Confidence Score: 5/5

Safe to merge with low risk.

Changes are contained to client-side rank tracking filters, sorting accessors, and focused tests. No correctness, security, or behavioral coverage issues were identified in the changed paths.

No files require special attention.

T-Rex Logs

What T-Rex did

• The local rank-tracking seed initialization completed with exit code 0, as shown in the seed log.
• Dev-server start attempts and blockers are documented across the start-retry, server-ci, and server-final logs.
• The focused filter logic test suite passed, as verified in the filters vitest log.

_{Ran code and verified through T-Rex}

Important Files Changed

Filename	Overview
src/client/features/rank-tracking/RankTrackingColumns.tsx	Replaces custom null-last numeric comparators with undefined accessors and TanStack sortUndefined: "last" for metric and position columns.
src/client/features/rank-tracking/RankTrackingFilters.logic.ts	Extracts filter helper logic and adds metric range matching for volume, keyword difficulty, and CPC.
src/client/features/rank-tracking/RankTrackingFilters.tsx	Keeps the public filter module export while adding UI controls for metric min/max filters.
src/client/features/rank-tracking/RankTrackingFilters.test.ts	Adds focused unit coverage for metric filters, null metric exclusion when bounded, and zero-value edge cases.

Sequence Diagram

%%{init: {'theme': 'neutral'}}%%
sequenceDiagram
participant User
participant FilterPanel
participant Logic as RankTrackingFilters.logic
participant Table as RankTrackingTable
participant Columns as RankTrackingColumns

User->>FilterPanel: Enter min/max metric filters
FilterPanel->>Logic: Update Filters state
Logic->>Logic: applyFilters(rows, filters)
Logic-->>Table: Filtered rows
User->>Columns: Toggle numeric column sort
Columns-->>Table: Accessor value or undefined
Table-->>User: Render sorted rows with undefined values last

Loading

%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
sequenceDiagram
participant User
participant FilterPanel
participant Logic as RankTrackingFilters.logic
participant Table as RankTrackingTable
participant Columns as RankTrackingColumns

User->>FilterPanel: Enter min/max metric filters
FilterPanel->>Logic: Update Filters state
Logic->>Logic: applyFilters(rows, filters)
Logic-->>Table: Filtered rows
User->>Columns: Toggle numeric column sort
Columns-->>Table: Accessor value or undefined
Table-->>User: Render sorted rows with undefined values last

Loading

_{Reviews (1): Last reviewed commit: "Merge branch 'every-app:main' into fix/r..." | Re-trigger Greptile}

[bensenescu]

Thanks for this, hope you join the discord! https://discord.com/invite/c9uGs3cFXr

[A-S-Manoj]

Thanks! Glad to contribute, and I'll definitely check out the Discord.