Fix terminal hyperlinks and wrapped selection copying

[fdx-peter]

Human comments

Yeah so basically I tried to claude /login in a terminal and the inability to click the long auth link (or copy-paste) was super fustrating......so I told bb to fix itself.

What was wrong

The host terminal environment did not advertise OSC 8 support, so programs using supports-hyperlinks-style detection could flatten named hyperlinks into display text and discard the target. The clients also did not install an OSC 8 activation handler, and desktop/web context-menu copying did not use xterm's logical selection, so a soft-wrapped selection could be reduced to one rendered row. See #2469.

What changed

• Advertise hyperlink support to spawned terminal processes with FORCE_HYPERLINK=1.
• Route desktop/web OSC 8 activation through bb's URL navigation after disclosing and confirming the exact target in bb's responsive dialog; visibly detected URLs retain direct activation.
• Add terminal context-menu actions for opening/copying links and copying the exact xterm selection across soft-wrapped rows.
• Route mobile OSC 8 activation through the native bridge and require confirmation showing the exact URL before opening it.
• Preserve link provenance through the mobile bridge so visibly detected URLs still open directly, matching desktop/web behavior.
• Regenerate the committed mobile terminal page and add regression coverage for the host environment, desktop/web handlers, mobile confirmation, and generated asset parity.
• No HOST_DAEMON_PROTOCOL_VERSION bump is needed because this changes only the environment of newly spawned PTYs; no server/daemon wire field or message changed.
• FORCE_HYPERLINK is the available opt-in for programs that do not recognize bb as a terminal. Programs that treat it as an unconditional override may also emit OSC 8 when their output is redirected; callers requiring plain redirected output can set FORCE_HYPERLINK=0 for that command.

How you verified

• App terminal test suite — 41 tests passed.
• Focused host-daemon terminal tests — 29 tests passed.
• Mobile terminal test suite — 32 tests passed.
• pnpm exec turbo run typecheck lint --filter=@bb/app --filter=@bb/host-daemon --filter=@bb/mobile — all tasks passed; lint reported 0 errors.
• pnpm run build — all 12 production build tasks passed.
• Oxfmt and git diff --check passed for the changed source files.
• Exercised the full flow with Computer Use against an isolated development instance: OSC 8 confirmation/open, direct visible-URL opening, combined link/selection context menu, and copying a 620-character soft-wrapped selection as one logical value.

Fixes #2469

AGENT GENERATED