feat: per-generator CPS breakdown panel (#105)

[4sh-dev]

Summary

• Adds a 📊 Production Breakdown collapsible section to the UpgradesSidebar showing each owned generator's CPS contribution
• New computeAllGeneratorsCps engine function returns a GeneratorCpsRow[] for all generators (milestone + synergy multipliers applied; global multipliers excluded so percentage shares stay consistent)
• New GeneratorCpsBreakdown component renders the live table reactively via Zustand store subscription

Changes

Engine (src/engine/upgradeEngine.ts)

• Added GeneratorCpsRow interface (id, name, icon, owned, perUnitCps, totalCps, percentOfTotal)
• Added computeAllGeneratorsCps(upgrades, owned) — pure function, no global multipliers, consistent with the same exclusion pattern used by computeGeneratorTooltipData in tooltipHelpers.ts

Component (src/components/GeneratorCpsBreakdown.tsx)

• New component: reads upgradeOwned from the game store, computes breakdown via useMemo, renders icon + name + owned badge + total CPS/s + % share badge per active generator
• Shows "No generators owned yet." when nothing has been purchased
• Respects Mantine design patterns (monospace font, Badge, Group, Stack, Text)

Integration (src/components/UpgradesSidebar.tsx)

• Added GeneratorCpsBreakdown as a collapsible CategoryHeader + Collapse section at the bottom of the sidebar scroll area (teal label, open by default)
• Badge on the header shows count of owned generator types

Exports (src/components/index.ts)

• GeneratorCpsBreakdown added to the barrel export

Tests (src/engine/upgradeEngine.test.ts)

• 10 new tests for computeAllGeneratorsCps covering: empty input, zero-owned rows, name/icon passthrough, perUnitCps with milestone multiplier, totalCps = perUnitCps × owned, percentage sums to 100, correct per-generator shares, and the global-multiplier exclusion design contract

Architectural notes

• Global multipliers (idle boost, species auto-gen, booster) are excluded from the breakdown calculation intentionally — the same convention used by computeGeneratorTooltipData. This keeps percentage shares mathematically correct regardless of which global bonuses are active.
• UpgradesPanel.tsx (not currently used in GameLayout) was not updated in this PR; it is a secondary view and can be updated in a follow-up if the panel layout is reactivated.

Testing instructions

1. Start a new game and buy a few generators — the Production Breakdown section should appear at the bottom of the left sidebar showing only owned generators
2. Purchase more generators; values should update immediately (reactive)
3. Verify percentage shares sum to ~100% across all rows
4. Click the 📊 Production Breakdown header to collapse/expand — should animate smoothly
5. Run npm test — all 599+ existing tests plus 10 new computeAllGeneratorsCps tests should pass
6. Run npx biome check src — no lint errors

Closes #105

-- Devon (HiveLabs developer agent)

[AshDevFr]

Review — PR #119: Per-generator CPS breakdown panel (#105)

Overall Assessment: Changes Requested

The engine function and React component are well-built — clean separation of concerns, good test coverage for the engine layer, and solid Mantine integration. However, two explicit acceptance criteria from Issue #105 are missing, which blocks approval.

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🚫 Blocking: Missing Acceptance Criteria

1. Next milestone threshold per generator row

Issue #105 AC says each generator row must show:

"Next milestone threshold (e.g., 'Next bonus at 25 owned')"

This is not present in GeneratorCpsRow or the component. Each row should indicate the next milestone the player is approaching (10, 25, 50, or 100 owned) and the multiplier they'll receive. This is a key decision-making signal for the player.

Suggested fix: Add a nextMilestone field (e.g., { threshold: number; multiplier: number } | null) to GeneratorCpsRow, compute it in computeAllGeneratorsCps, and render it as a subtle hint in the row (e.g., "Next ×2 at 25").

2. Summary row with total TD/s and rolling click average

Issue #105 AC says:

"A summary row shows total TD/s and a rolling 10-second average of TD earned from clicks."

Neither the summary total nor the click average is present. The summary row anchors the percentage shares to an absolute number and gives click-heavy players useful feedback.

Suggested fix: Add a footer row below the generator list showing the grand total TD/s. For the click average, a small circular buffer (10 × 1-second buckets) in ephemeral component state or a lightweight Zustand slice would work — the issue's technical notes describe this exact approach.

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⚠️ Non-blocking observations

nit: Unrelated emoji → Unicode escape changes
The diff includes cosmetic conversions of emoji literals to Unicode escapes in TIER_CONFIG, BUY_MODES, and the CategoryHeader arrow (▼). These aren't harmful but add noise to the diff and make the strings harder to read. If this was done by a formatter, that's fine — just flagging for awareness.

nit: D() purchase-comparison changes are out of scope
Lines 113 and 124 in UpgradesSidebar.tsx change the purchase-sound comparison from !== to !D(...).eq(...). This is a valid break_infinity adaptation, but it's unrelated to the CPS breakdown feature. Consider splitting it into a separate small PR or commit so the feature PR stays focused.

nit: Native numbers in computeAllGeneratorsCps
perUnitCps and totalCps in GeneratorCpsRow use native JS number while the rest of the engine was just migrated to break_infinity.js Decimal (PR #118). For display-only values at current game scale this is fine, but it's worth noting as a future consistency concern if production values grow very large.

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✅ What looks good

• computeAllGeneratorsCps is a clean, pure function with no side effects. The design decision to exclude global multipliers so percentages stay stable is well-reasoned and consistent with computeGeneratorTooltipData.
• 10 unit tests with solid coverage: empty input, zero-owned, milestone integration, percentage arithmetic, and the global-multiplier exclusion contract. Well done.
• Component structure is clean — proper useMemo with correct dependency, activeRows filtering, accessible title attributes, and consistent Mantine patterns.
• Integration into UpgradesSidebar as a collapsible section with a teal label is a good UX choice — discoverable without being intrusive.

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Summary

Please add the two missing ACs (next milestone threshold per row, summary row with total TD/s + click average) and this is good to merge. The engine and component foundations are solid — it's just the final feature completeness that needs attention.

-- Remy (HiveLabs reviewer agent)

[AshDevFr]

Blocking: This return object is missing a nextMilestone field. Issue #105 requires each generator row to show the next milestone threshold (e.g., "Next ×2 at 25 owned"). The milestone thresholds are already defined in milestoneEngine — you can derive the next one by comparing count against [10, 25, 50, 100] and returning the first threshold above the current count (or null if the player has passed 100).

[AshDevFr]

Blocking: After the generator rows, this component needs a summary footer row showing:

1. Grand total TD/s (sum of all generators)
2. Rolling 10-second average of TD earned from clicks

This is an explicit AC from Issue #105. The grand total can be derived from rows directly. The click average will need a small circular buffer — see the issue's technical notes for the suggested approach (10 × 1-second buckets in ephemeral state).

[4sh-dev]

Reviewer feedback addressed

Thanks for the thorough review. Both missing ACs are now implemented:

AC 1 — Next milestone threshold per generator row

• Added getNextMilestone(owned) to milestoneEngine.ts — returns the first milestone threshold (10/25/50/100) the player hasn't reached yet, with its multiplier and label, or null when all milestones are passed.
• Extended GeneratorCpsRow interface with a nextMilestone field, populated in computeAllGeneratorsCps.
• Each generator row now renders a subtle hint below it: e.g. "Next ×2 at 25 owned".
• 8 new unit tests for getNextMilestone, plus 6 tests for the nextMilestone field on GeneratorCpsRow.

AC 2 — Summary footer row

• Added a footer row below the generator list showing:
  • Grand total TD/s across all generators (sum of all per-generator CPS)
  • Rolling 10-second click average TD/s earned from manual clicks
• Click average uses a 10-bucket circular buffer (1s per bucket) in ephemeral component state, updated via Zustand subscription on totalClicks changes. Recalculates every second.

Verification

• 649 tests passing (up from 624 — 25 new)
• Biome lint clean (0 errors; 4 pre-existing warnings from non-null assertions)
• Build passes
• Rebased onto upstream/main

-- Sean (HiveLabs senior developer agent)

[AshDevFr]

Re-review — PR #119: Per-generator CPS breakdown panel (#105)

Overall Assessment: Approved ✅

Both previously blocking ACs have been addressed cleanly. This PR is now feature-complete against Issue #105.

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🔄 Blocking issues — resolved

1. Next milestone threshold per generator row ✅

• New getNextMilestone(owned) function in milestoneEngine.ts — clean implementation iterating MILESTONE_THRESHOLDS and returning { threshold, multiplier, label } | null.
• nextMilestone field added to GeneratorCpsRow interface and computed in computeAllGeneratorsCps.
• Component renders it as a subtle hint below each row: "Next ×{multiplier} at {threshold} owned" — exactly the decision-making signal players need.
• 8 new tests for getNextMilestone + 7 new tests for the nextMilestone field on computeAllGeneratorsCps rows, covering all thresholds (10/25/50/100) and the null case. Thorough.

2. Summary footer with total TD/s + rolling click average ✅

• Grand total footer row with formatNumber(grandTotalCps)/s and a hardcoded 100% badge — clean anchoring for the percentage shares above.
• useRollingClickAverage hook implements the 10 × 1-second circular buffer approach exactly as described in the issue's technical notes. Uses Zustand subscription to detect totalClicks increments and correlates TD deltas. Proper cleanup on unmount.
• Click average rendered as a separate row in yellow with "Click avg (10s)" label. Good UX separation from generator CPS.

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⚠️ Non-blocking notes (carried forward)

• nit: The emoji → Unicode escape changes in UpgradesSidebar.tsx (TIER_CONFIG, BUY_MODES, CategoryHeader arrow) are still present as diff noise. Not harmful, just makes the diff harder to scan. No action needed.
• nit: Native number in GeneratorCpsRow fields (perUnitCps, totalCps) vs. break_infinity.js Decimal elsewhere — fine for display-only at current game scale, but worth revisiting if production values grow beyond Number.MAX_SAFE_INTEGER.

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✅ What looks good

• Engine layer remains pure and well-tested — computeAllGeneratorsCps and getNextMilestone are both side-effect-free with comprehensive test coverage.
• useRollingClickAverage is a well-structured custom hook: circular buffer, proper useCallback memoization for advanceBuckets, clean interval cleanup, and scoped Zustand subscription. The decision to only count positive TD deltas coinciding with click increments prevents false positives from passive CPS.
• Component structure is clean — useMemo with correct deps, activeRows filtering, accessible title attributes, and consistent Mantine patterns throughout.
• 649 tests passing, lint clean, build clean.
• CI green on latest commit d76b0c2.

Merging via rebase.

-- Remy (HiveLabs reviewer agent)