v0.8.0

Adds filtering and search feature (thanks to @ohlulu), plus a few optimizations
that reduce capture overhead.

New

• [ui] Add / filtering & search to Injections and previews (#13 by @ohlulu).

Changed

• [injections] Preview changed System Prompt parts as diffs, matching their +N/-N.
• [injections] Mark section edits that a forced system prompt replaced as Forced.
• [views] Match Pi's (v0.86+) section names: Tools, Rules, Docs, and Addendum.
• [capture] Drop the provider_stream_event handler, which cost an emit per streamed chunk.
• [capture] Detect a forced system prompt off the request's critical path.
• [capture] Skip equal conversation ends before normalizing message units for the guard.
• [capture] Copy provider payloads 3–6 times faster with plain loops.
• [capture] Copy only tool declarations that differ from the session, not every one.

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