Add Phase 2 NPCs, aging/wisdom bonuses, simstagram helpers, organic encounter summaries, and tests

[Earnest-Williams]

Motivation

• Extend the world with a second phase of NPCs and wire them into encounters, schedules, dates, and reputation while improving UX for organic encounters and Simstagram posting rules.
• Introduce life-progression mechanics that reward older characters with small "wisdom" bonuses to eligible stat gains and add birthday progression when time advances.
• Factor out small UI and simulation helpers to centralize logic for organic encounter reward summaries and Simstagram eligibility/stat multipliers.

Description

• Added a new Phase 2 NPC set and romance arcs and integrated them into NPCS, DATE_PREFERENCES, NPC_SCHEDULE, and REPUTATION_CIRCLES by updating src/data/npcs.js, src/data/dates.js, src/data/townTexture.js, and src/sim/reputation.js.
• Implemented an aging/wisdom system with applyWisdomBonus and birthday progression in simulateTicks, and applied the bonus across stat gains in action.js (routines, actions, cooking, and course completion).
• Extracted organic encounter reward formatting to src/components/organicEncounterRewards.js and updated OrganicEncounterUI.jsx to show reward summaries inline with choices.
• Added Simstagram helper functions in src/sim/simstagram.js and integrated them into SimstagramApp.jsx and the socialMedia reducer to unify energy checks and stat multiplier math.
• Small refactors and cleanup across components to remove unused imports and standardize logic (e.g. TimeControls speed constants, selector adjustment in selectors.js, and minor fixes in dashboard components).
• Added comprehensive unit tests validating aging/wisdom behavior, Phase 2 NPC integration, Simstagram consistency, organic encounter summary formatting, relationship memory constraints, romance arc shape, and UI privacy checks under test/*.test.js.

Testing

• Ran the test suite via the project test runner (npm test / node:test) which executed the new unit tests in test/agingWisdom.test.js, test/phase2NpcIntegration.test.js, test/simstagramConsistency.test.js, test/organicEncounterUI.test.js, test/relationshipMemory.test.js, test/romanceArc.test.js, and test/compatibilityPrivacy.test.js.
• All new and existing automated tests passed successfully without regressions.

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Codex Task

[gemini-code-assist]

Code Review

This pull request introduces Phase 2 NPCs with complete romance arcs, schedules, and preferences, alongside a new birthday progression system and a 'wisdom bonus' that boosts stat gains for characters over age 30. It also refactors Simstagram logic into a dedicated utility module and adds extensive test coverage. The review feedback focuses on enhancing robustness by adding defensive checks to several new functions to prevent potential runtime crashes when dealing with null or undefined inputs.

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