Refactor panes and filesystem; replace FUSE with 9P

Consolidate pane, layout, memory and host code. Serve 9P by default over Unix sockets, with runtime mounts and optional TCP/QUIC transports. Remove FUSE and obsolete proof-of-concept examples.

Fix highlighting and terminal-history performance, expand differential and stress-test infrastructure, sort navigation results while preserving the next occurrence, add syntax-colored Braille minimaps, remove SPC-k, and document 9P interaction as a repository skill.

1 files changed, 195 insertions, 0 deletions

diff --git a/test/snapshots/ninep.golden b/test/snapshots/ninep.golden
new file mode 100644
index 00000000..c0e90e3f
--- /dev/null
+++ b/test/snapshots/ninep.golden
@@ -0,0 +1,195 @@
+== snap opened grid=90x14 cursor=7,2
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/ninep/cwd/demo.zig              Save New Newtty Del
+|     1 const greeting = "café λ 界 é";
+|     2
+|     3 pub fn choose(ok: bool) u32 {
+|     4     if (ok) return 42;
+|     5     return 7;
+|     6 }
+|     7
+== style opened grid=90x14
+|0: 0-74 #949494,#121212, 75-89 d,#121212,
+|1: 0-1 #ffffff,#626262, 2-69 #949494,#121212, 70-89 d,#121212,
+|2: 0-0 d,#444444, 1-1 d,#080808, 2-6 #949494,#121212, 7-23 #bdbdbd,#080808, 24-32 #e3c78a,#080808, 33-33 d,d, 34-36 #e3c78a,#080808, 37-37 #bdbdbd,#080808, 38-89 d,#080808,
+|3: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-89 d,#080808,
+|4: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-10 #bdbdbd,#080808, 11-12 #cf87e8,#080808,b 13-35 #bdbdbd,#080808, 36-89 d,#080808,
+|5: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-10 #bdbdbd,#080808, 11-12 #cf87e8,#080808,b 13-18 #bdbdbd,#080808, 19-24 #cf87e8,#080808,b 25-25 #bdbdbd,#080808, 26-27 #e3c78a,#080808, 28-28 #bdbdbd,#080808, 29-89 d,#080808,
+|6: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-10 #bdbdbd,#080808, 11-16 #cf87e8,#080808,b 17-17 #bdbdbd,#080808, 18-18 #e3c78a,#080808, 19-19 #bdbdbd,#080808, 20-89 d,#080808,
+|7: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-7 #bdbdbd,#080808, 8-89 d,#080808,
+|8: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-89 d,#080808,
+|9: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-89 d,#080808,
+|10: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-89 d,#080808,
+|11: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-89 d,#080808,
+|12: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-89 d,#080808,
+|13: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-89 d,#080808,
+== 9p opened grid=90x14 cursor=7,2,block
+|0: New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+@0: 0-74 #949494,#121212,,tagline 75-89 d,#121212,,tagline
+|1:   /tmp/pardes-snap/ninep/cwd/demo.zig              Save New Newtty Del
+@1: 0-1 #ffffff,#626262,,tagline 2-69 #949494,#121212,,tagline 70-89 d,#121212,,tagline
+|2:      1 const greeting = "café λ 界 é";
++2: 28="é" 30="λ" 32="界" 33="" 35="é"
+@2: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #949494,#121212,,body 7-23 #bdbdbd,#080808,,body 24-36 #e3c78a,#080808,,body 37-37 #bdbdbd,#080808,,body 38-89 d,#080808,,body
+|3:      2
+@3: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-89 d,#080808,,body
+|4:      3 pub fn choose(ok: bool) u32 {
+@4: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-10 #bdbdbd,#080808,,body 11-12 #cf87e8,#080808,b,body 13-35 #bdbdbd,#080808,,body 36-89 d,#080808,,body
+|5:      4     if (ok) return 42;
+@5: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-10 #bdbdbd,#080808,,body 11-12 #cf87e8,#080808,b,body 13-18 #bdbdbd,#080808,,body 19-24 #cf87e8,#080808,b,body 25-25 #bdbdbd,#080808,,body 26-27 #e3c78a,#080808,,body 28-28 #bdbdbd,#080808,,body 29-89 d,#080808,,body
+|6:      5     return 7;
+@6: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-10 #bdbdbd,#080808,,body 11-16 #cf87e8,#080808,b,body 17-17 #bdbdbd,#080808,,body 18-18 #e3c78a,#080808,,body 19-19 #bdbdbd,#080808,,body 20-89 d,#080808,,body
+|7:      6 }
+@7: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-7 #bdbdbd,#080808,,body 8-89 d,#080808,,body
+|8:      7
+@8: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-89 d,#080808,,body
+|9:
+@9: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-89 d,#080808,,body
+|10:
+@10: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-89 d,#080808,,body
+|11:
+@11: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-89 d,#080808,,body
+|12:
+@12: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-89 d,#080808,,body
+|13:
+@13: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-89 d,#080808,,body
+== style colors-off grid=90x14
+|2: 0-0 d,#444444, 1-1 d,#080808, 2-6 #949494,#121212, 7-32 #bdbdbd,#080808, 33-33 d,d, 34-37 #bdbdbd,#080808, 38-89 d,#080808,
+|4: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-35 #bdbdbd,#080808, 36-89 d,#080808,
+|5: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-28 #bdbdbd,#080808, 29-89 d,#080808,
+|6: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-19 #bdbdbd,#080808, 20-89 d,#080808,
+== 9p colors-off grid=90x14 cursor=7,2,block
+|2:      1 const greeting = "café λ 界 é";
++2: 28="é" 30="λ" 32="界" 33="" 35="é"
+@2: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #949494,#121212,,body 7-37 #bdbdbd,#080808,,body 38-89 d,#080808,,body
+|4:      3 pub fn choose(ok: bool) u32 {
+@4: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-35 #bdbdbd,#080808,,body 36-89 d,#080808,,body
+|5:      4     if (ok) return 42;
+@5: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-28 #bdbdbd,#080808,,body 29-89 d,#080808,,body
+|6:      5     return 7;
+@6: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-19 #bdbdbd,#080808,,body 20-89 d,#080808,,body
+== snap edited-with-colors-off grid=90x14 cursor=7,3
+|1:   /tmp/pardes-snap/ninep/cwd/demo.zig *            Save New Newtty Del
+|2:      1 // café λ 界
+|3:      2 const greeting = "café λ 界 é";
+|4:      3
+|5:      4 pub fn choose(ok: bool) u32 {
+|6:      5     if (ok) return 42;
+|7:      6     return 7;
+|8:      7 }
+|9:      8
+== 9p edited-with-colors-off grid=90x14 cursor=7,3,block
+|1:   /tmp/pardes-snap/ninep/cwd/demo.zig *            Save New Newtty Del
+@1: 0-1 #ffffff,#626262,,tagline 2-69 #949494,#121212,,tagline 70-89 d,#121212,,tagline
+|2:      1 // café λ 界
++2: 13="é" 15="λ" 17="界" 18=""
+@2: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-18 #bdbdbd,#080808,,body 19-89 d,#080808,,body
+|3:      2 const greeting = "café λ 界 é";
++3: 28="é" 30="λ" 32="界" 33="" 35="é"
+@3: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #949494,#121212,,body 7-37 #bdbdbd,#080808,,body 38-89 d,#080808,,body
+|4:      3
+@4: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-89 d,#080808,,body
+|5:      4 pub fn choose(ok: bool) u32 {
+@5: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-35 #bdbdbd,#080808,,body 36-89 d,#080808,,body
+|6:      5     if (ok) return 42;
+@6: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-28 #bdbdbd,#080808,,body 29-89 d,#080808,,body
+|7:      6     return 7;
+@7: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-19 #bdbdbd,#080808,,body 20-89 d,#080808,,body
+|8:      7 }
+@8: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-7 #bdbdbd,#080808,,body 8-89 d,#080808,,body
+|9:      8
+@9: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-89 d,#080808,,body
+== style colors-on grid=90x14
+|2: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-17 #ffffff,#080808,b 18-18 d,d, 19-89 d,#080808,
+|3: 0-0 d,#444444, 1-1 d,#080808, 2-6 #949494,#121212, 7-23 #bdbdbd,#080808, 24-32 #e3c78a,#080808, 33-33 d,d, 34-36 #e3c78a,#080808, 37-37 #bdbdbd,#080808, 38-89 d,#080808,
+|4: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-89 d,#080808,
+|5: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-10 #bdbdbd,#080808, 11-12 #cf87e8,#080808,b 13-35 #bdbdbd,#080808, 36-89 d,#080808,
+|6: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-10 #bdbdbd,#080808, 11-12 #cf87e8,#080808,b 13-18 #bdbdbd,#080808, 19-24 #cf87e8,#080808,b 25-25 #bdbdbd,#080808, 26-27 #e3c78a,#080808, 28-28 #bdbdbd,#080808, 29-89 d,#080808,
+|7: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-10 #bdbdbd,#080808, 11-16 #cf87e8,#080808,b 17-17 #bdbdbd,#080808, 18-18 #e3c78a,#080808, 19-19 #bdbdbd,#080808, 20-89 d,#080808,
+|8: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-7 #bdbdbd,#080808, 8-89 d,#080808,
+== 9p colors-on grid=90x14 cursor=7,3,block
+|2:      1 // café λ 界
++2: 13="é" 15="λ" 17="界" 18=""
+@2: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-18 #ffffff,#080808,b,body 19-89 d,#080808,,body
+|3:      2 const greeting = "café λ 界 é";
++3: 28="é" 30="λ" 32="界" 33="" 35="é"
+@3: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #949494,#121212,,body 7-23 #bdbdbd,#080808,,body 24-36 #e3c78a,#080808,,body 37-37 #bdbdbd,#080808,,body 38-89 d,#080808,,body
+|5:      4 pub fn choose(ok: bool) u32 {
+@5: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-10 #bdbdbd,#080808,,body 11-12 #cf87e8,#080808,b,body 13-35 #bdbdbd,#080808,,body 36-89 d,#080808,,body
+|6:      5     if (ok) return 42;
+@6: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-10 #bdbdbd,#080808,,body 11-12 #cf87e8,#080808,b,body 13-18 #bdbdbd,#080808,,body 19-24 #cf87e8,#080808,b,body 25-25 #bdbdbd,#080808,,body 26-27 #e3c78a,#080808,,body 28-28 #bdbdbd,#080808,,body 29-89 d,#080808,,body
+|7:      6     return 7;
+@7: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-10 #bdbdbd,#080808,,body 11-16 #cf87e8,#080808,b,body 17-17 #bdbdbd,#080808,,body 18-18 #e3c78a,#080808,,body 19-19 #bdbdbd,#080808,,body 20-89 d,#080808,,body
+== style resized grid=105x19
+|0: 0-74 #949494,#121212, 75-104 d,#121212,
+|1: 0-1 #ffffff,#626262, 2-84 #949494,#121212, 85-104 d,#121212,
+|2: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-17 #ffffff,#080808,b 18-18 d,d, 19-104 d,#080808,
+|3: 0-0 d,#444444, 1-1 d,#080808, 2-6 #949494,#121212, 7-23 #bdbdbd,#080808, 24-32 #e3c78a,#080808, 33-33 d,d, 34-36 #e3c78a,#080808, 37-37 #bdbdbd,#080808, 38-104 d,#080808,
+|4: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+|5: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-10 #bdbdbd,#080808, 11-12 #cf87e8,#080808,b 13-35 #bdbdbd,#080808, 36-104 d,#080808,
+|6: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-10 #bdbdbd,#080808, 11-12 #cf87e8,#080808,b 13-18 #bdbdbd,#080808, 19-24 #cf87e8,#080808,b 25-25 #bdbdbd,#080808, 26-27 #e3c78a,#080808, 28-28 #bdbdbd,#080808, 29-104 d,#080808,
+|7: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-10 #bdbdbd,#080808, 11-16 #cf87e8,#080808,b 17-17 #bdbdbd,#080808, 18-18 #e3c78a,#080808, 19-19 #bdbdbd,#080808, 20-104 d,#080808,
+|8: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-7 #bdbdbd,#080808, 8-104 d,#080808,
+|9: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+|10: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+|11: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+|12: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+|13: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+|14: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+|15: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+|16: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+|17: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+|18: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-104 d,#080808,
+== 9p resized grid=105x19 cursor=7,3,block
+|0: New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+@0: 0-74 #949494,#121212,,tagline 75-104 d,#121212,,tagline
+|1:   /tmp/pardes-snap/ninep/cwd/demo.zig *                           Save New Newtty Del
+@1: 0-1 #ffffff,#626262,,tagline 2-84 #949494,#121212,,tagline 85-104 d,#121212,,tagline
+|2:      1 // café λ 界
++2: 13="é" 15="λ" 17="界" 18=""
+@2: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-18 #ffffff,#080808,b,body 19-104 d,#080808,,body
+|3:      2 const greeting = "café λ 界 é";
++3: 28="é" 30="λ" 32="界" 33="" 35="é"
+@3: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #949494,#121212,,body 7-23 #bdbdbd,#080808,,body 24-36 #e3c78a,#080808,,body 37-37 #bdbdbd,#080808,,body 38-104 d,#080808,,body
+|4:      3
+@4: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+|5:      4 pub fn choose(ok: bool) u32 {
+@5: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-10 #bdbdbd,#080808,,body 11-12 #cf87e8,#080808,b,body 13-35 #bdbdbd,#080808,,body 36-104 d,#080808,,body
+|6:      5     if (ok) return 42;
+@6: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-10 #bdbdbd,#080808,,body 11-12 #cf87e8,#080808,b,body 13-18 #bdbdbd,#080808,,body 19-24 #cf87e8,#080808,b,body 25-25 #bdbdbd,#080808,,body 26-27 #e3c78a,#080808,,body 28-28 #bdbdbd,#080808,,body 29-104 d,#080808,,body
+|7:      6     return 7;
+@7: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-10 #bdbdbd,#080808,,body 11-16 #cf87e8,#080808,b,body 17-17 #bdbdbd,#080808,,body 18-18 #e3c78a,#080808,,body 19-19 #bdbdbd,#080808,,body 20-104 d,#080808,,body
+|8:      7 }
+@8: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-7 #bdbdbd,#080808,,body 8-104 d,#080808,,body
+|9:      8
+@9: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+|10:
+@10: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+|11:
+@11: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+|12:
+@12: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+|13:
+@13: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+|14:
+@14: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+|15:
+@15: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+|16:
+@16: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+|17:
+@17: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+|18:
+@18: 0-0 d,#444444,,body 1-1 d,#080808,,body 2-6 #626262,#080808,,body 7-104 d,#080808,,body
+== snap resized grid=105x19 cursor=7,3
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/ninep/cwd/demo.zig *                           Save New Newtty Del
+|     1 // café λ 界
+|     2 const greeting = "café λ 界 é";
+|     3
+|     4 pub fn choose(ok: bool) u32 {
+|     5     if (ok) return 42;
+|     6     return 7;
+|     7 }
+|     8
+== 9p unchanged grid=105x19 cursor=7,3,block