refactor(mobile): share session presentation semantics

[richardsolomou]

Problem

Desktop and mobile independently parse PostHog MCP exec commands and maintain duplicate thinking-activity catalogs. Tool rows and generating indicators can therefore present the same session differently.

Changes

Move PostHog exec recognition, command parsing, labels, and body formatting into core and consume it from both renderers. Move thinking activities and deterministic next-activity selection into core while retaining host-specific animation timing.

How did you test this?

• Focused core thinking-activity tests
• Mobile PostHog exec and session-view tests
• Core and UI typechecks
• Biome on changed files
• Host-boundary check

Automatic notifications

• Publish to changelog?
• Alert Sales and Marketing teams?

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Created with PostHog Code

[github-actions]

React Doctor found 1 issue in 1 file · 1 warning.

1 warning

src/features/chat/components/AgentMessage.tsx

• ⚠️ src/features/chat/components/AgentMessage.tsx:113 Time or random value in JSX rendering-hydration-mismatch-time

_{Reviewed by React Doctor for commit 436f795.}