Add AI Connections CRM, Flow chat, and a UI overhaul

[diego-sandy]

What & why

Turns inflow's Connections into an AI-assisted CRM, adds a dedicated network AI ("Flow"), and gives the app a visual refresh.

Connections + AI

• Full connection pagination (was capped at 40); re-sync preserves AI fields (mergeConnections).
• AI categorization — fixed roles + user interest tags, auto/manual mode, ~6-month staleness re-scan, throttle/backoff + circuit breaker, per-row refresh, right-click context menu, colored role/tag badges.
• Connection detail — AI one-line summary, plus a Conversation card: shows whether you've messaged someone, jumps to the thread, and AI-summarizes the history (markdown, with an "outdated" flag).
• Insights — animated charts (bar / column / 3D pie) with an icon-only type switcher and click-to-drill-in; reliable Customize (move/hide) replacing the broken drag; AI suggestions as its own card.

Providers

• Add Anthropic (Claude) as a selectable provider with fast/quality model tiers; Gemini still supported. Configured in Settings → AI (api.anthropic.com host permission added).

Flow (network AI chat)

• Dedicated Flow nav section: persistent, multi-conversation chat with a history sidebar, grounded in connections + their AI summaries. Answers render as markdown, unencapsulated, copyable.

Messaging

• Send file/photo attachments (paperclip + photo buttons; drag/paste already worked) with a 20 MB guard; emoji picker.

UI / design

• Purple theme; translucent glassy primary buttons + message bubbles.
• Gradient inflow wordmark + ƒ monogram lockup.
• Nav rail: back/forward section-history arrows, hover section tooltips, edge-handle collapse.
• Settings modal (replaces the ⌘K-only AI modal); folder-based, migration-aware backup/restore; What's-new modal; 4-part build versioning.

Testing

• npx vitest run — 1023 passing
• npx tsc --noEmit — clean
• npm run build — OK

Reviewer notes

• New DB tables/migrations: connections (v13/v14) and insightChats (v15) — additive.
• Sending attachments hits LinkedIn's media-upload endpoint; the register-response shape is defensive and worth confirming against live traffic.
• Provider defaults to Gemini for back-compat; switch to Claude in Settings.

🤖 Generated with Claude Code