feat(web-app-ai-doc-summary): add AI document summary extension

[LukasHirt]

Summary

Introduces a new web extension that summarises PDF, TXT and MD files using any OpenAI-compatible LLM endpoint.

• Adds a sidebar panel (Summary tab) and a context-menu "Summarise" action for supported file types
• Accepts endpoint, model and optional API key via application config; probes LLM capabilities (structured output, tool use, streaming, context window) on first use and caches the result
• Extracts text from PDFs via pdf.js in fake-worker mode to avoid CSP/Web Worker restrictions
• Generates a 2–3 sentence overview and 3–4 key points; responds in the user's preferred language (BCP 47)
• Adds unit and E2E test suites covering composables and the full summarise flow
• Wires an Ollama service into the dev docker-compose stack with a Traefik config for local LLM testing

Screenshots

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[LukasHirt]

@dj4oC this is the implementation of the first candidate. I am keeping it as a draft for now because we need to merge #443 first.

[dj4oC]

@dj4oC this is the implementation of the first candidate. I am keeping it as a draft for now because we need to merge #443 first.

Merged

[dj4oC]

• please always add all web extensions to ocis_full as well
• does the deployment include the model?

[LukasHirt]

• please always add all web extensions to ocis_full as well

Sure, once we have a release, I'll add it there.

• does the deployment include the model?

We can add the ollama into docker compose.